(Gas / LPG) Rider Scrubber Operator Manualassets.tennantco.com/globalassets/technicalassets/operator and... · Operator Manual 331470 Rev. 16 (5-2016) (Gas / LPG) ... It provides

T20

*331470*

Rider ScrubberOperator Manual

331470Rev. 16 (5-2016)

(Gas / LPG)

The Safe Scrubbing AlternativeR

ESR Extended Scrub SystemTennantTrueR Parts

HygenicR Fully Cleanable TanksFloorSmartR Integrated Cleaning System

IRISR a Tennant Technology

North America / International

R

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www.tennantco.com/manuals

INTRODUCTION

This manual is furnished with each new model. It provides necessary operation and maintenance instructions.

Read this manual completely and understand the machine before operating or servicing it.

This machine will provide excellent service. However, the best results will be obtained at minimum costs if:

� The machine is operated with reasonable care.

� The machine is maintained regularly - per the machine maintenance instructions provided.

� The machine is maintained with manufacturer supplied or equivalent parts.

Model No. −

Serial No. −

Installation Date −

Please fill out at time of installation

for future reference.

MACHINE DATAPROTECT THE ENVIRONMENT

Please dispose of packagingmaterials, used componentssuch as batteries and fluids inan environmentally safe wayaccording to local wastedisposal regulations.

Always remember to recycle.

INTENDED USE

The T20 is an industrial rider machine designed to scrub hard surfaces (concrete, asphalt, stone, synthetic, etc).Typical applications include industrial warehouses, manufacturing facilities, distribution facilities, stadiums, arenas,convention centers, parking facilities, transportation terminals, and construction sites. Do not use this machine on soil,grass, artificial turf, or carpeted surfaces. Do not use where excessive debris is present such as leaves, paper, etc.This machine can be used both indoors and outdoors, but ensure there is adequate ventilation if used indoors. Thismachine is not intended for use on public roadways. Do not use this machine other than described in this OperatorManual.

Tennant CompanyPO Box 1452Minneapolis, MN 55440Phone: (800) 553−8033 or (763) 513−2850www.tennantco.com

CALIFORNIA PROPOSITION 65 WARNING: Engine exhaust from this product contains chemicals known to the State of California to cause cancer,birth defects, or other reproductive harm.

Thermo−Sentry, Touch−N−Go, 1−STEP, Clean−Wedge, Variable Drain Valve, EasyOpen, Grip−n−Go, MaxPro, Dura−Track, SmartRelease, InstantAccess, Duramer, FaST−PAK, ErgoSpace, Insta−Fit, and Lower Total Cost of Ownership are trademarks of Tennant Company.

Specifications and parts are subject to change without notice.

Original Instructions, copyright � 2006 − 2012, 2014, 2015, 2016 TENNANT Company, Printed in U.S.A.

CONTENTS

1T20 Gas/LPG 331470 (12−2012)

CONTENTS

PageImportant Safety Instructions − Save

These Instructions 3. . . . . . . . . . . . . . . . . . . . .Operation 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Machine Components 7. . . . . . . . . . . . . . . . . .Controls And Instruments 8. . . . . . . . . . . . . . .Touch Panel 9. . . . . . . . . . . . . . . . . . . . . . . . . .Symbol Definitions 10. . . . . . . . . . . . . . . . . . . . .Operation Of Controls 11. . . . . . . . . . . . . . . . . .

Charging System Indicator 11. . . . . . . . . . .Engine Oil Pressure Indicator 11. . . . . . . .Check Engine Indicator 11. . . . . . . . . . . . . .Parking Brake Indicator (Option) 11. . . . . .Setting The Engine Speed 12. . . . . . . . . . .Side Brush (Option) 12. . . . . . . . . . . . . . . . .Fuel Indicator 12. . . . . . . . . . . . . . . . . . . . . . .Gasoline Machines 12. . . . . . . . . . . . . . . . .Lpg Machines 12. . . . . . . . . . . . . . . . . . . . . . .Hour Meter 13. . . . . . . . . . . . . . . . . . . . . . . . .Supervisor Control Buttons 13. . . . . . . . . . .Operating Lights 13. . . . . . . . . . . . . . . . . . . .Hazard Light (Option) 13. . . . . . . . . . . . . . .Operator Seat 14. . . . . . . . . . . . . . . . . . . . . . .Seat Belts 14. . . . . . . . . . . . . . . . . . . . . . . . . .Steering Column Tilt Knob 14. . . . . . . . . . .Brake Pedal 15. . . . . . . . . . . . . . . . . . . . . . . .Parking Brake Pedal 15. . . . . . . . . . . . . . . .Directional Pedal 15. . . . . . . . . . . . . . . . . . .Squeegee Protectors (Option) 15. . . . . . . .

How The Machine Works 16. . . . . . . . . . . . . . .Brush And Pad Information 17. . . . . . . . . . . . .While Operating The Machine 18. . . . . . . . . . .Pre−Operation Checklist 19. . . . . . . . . . . . . . . .Changing The Lpg Tank 20. . . . . . . . . . . . . . . .Starting The Machine 21. . . . . . . . . . . . . . . . . .Turning Off The Machine 21. . . . . . . . . . . . . . .Filling The Solution Tank 22. . . . . . . . . . . . . . . .

Foam Scrubbing (Fast Mode) / Ec−H2o Scrubbing (Ec−H2o Mode) 22. . . . . . . . .

Conventional Scrubbing Mode 22. . . . . . . .Es (Extended Scrub) Mode With

Auto−Fill 23. . . . . . . . . . . . . . . . . . . . . . . .Es (Extended Scrub) Mode − Manually

Filling Tank 23. . . . . . . . . . . . . . . . . . . . . . .

PageSetting Scrub Modes 24. . . . . . . . . . . . . . . . . . .

Setting Fast Mode 24. . . . . . . . . . . . . . . . . .Setting Es (Extended Scrub) Mode 24. . . .Setting Ec−H2o Mode 24. . . . . . . . . . . . . . .Setting Brush Pressure 24. . . . . . . . . . . . . .Setting Solution Flow 25. . . . . . . . . . . . . . . .Conventional, Fast, And Ec−H2o

Solution Flow 25. . . . . . . . . . . . . . . . . . . .Es (Extended Scrub) Solution Flow 25. . .

Scrubbing 26. . . . . . . . . . . . . . . . . . . . . . . . . . . .Double Scrubbing 27. . . . . . . . . . . . . . . . . . . . .Water Pickup Mode (No Scrubbing) 28. . . . . .Emptying And Cleaning The Debris Tray −

Cylindrical Scrub Heads Only 29. . . . . . . .Draining And Cleaning The Recovery Tank 31Draining The Recovery Tank With The

Drain Hose 31. . . . . . . . . . . . . . . . . . . . . . . .Draining The Recovery Tank With

The Drain Plug 32. . . . . . . . . . . . . . . . . . . . .Draining And Cleaning The Solution Tank 34.Fault Indicator(S) 36. . . . . . . . . . . . . . . . . . . . . .Conditions / Warnings 37. . . . . . . . . . . . . . . . . .Options 38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Spray Nozzle (Option) 38. . . . . . . . . . . . . . .Vacuum Wand (Option) 39. . . . . . . . . . . . . .Power Wand (Option) 40. . . . . . . . . . . . . . .

Machine Troubleshooting 42. . . . . . . . . . . . . . .

CONTENTS

T20 Gas/LPG 331470 (5−2016)2

PageMaintenance 44. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Maintenance Chart 45. . . . . . . . . . . . . . . . . . . .Lubrication 48. . . . . . . . . . . . . . . . . . . . . . . . . . .

Engine Oil 48. . . . . . . . . . . . . . . . . . . . . . . . .Squeegee Caster Bearings 48. . . . . . . . . .Front Wheel Support Bearing 48. . . . . . . . .Steering Cylinder Bearing 48. . . . . . . . . . . .Rear Wheel Bearings 48. . . . . . . . . . . . . . .Torque Tubes−Cylindrical Brushes 49. . . .Torque Tubes−Disk Brushes 49. . . . . . . . .Pivot Shaft−Disk Brushes 49. . . . . . . . . . . .

Hydraulics 50. . . . . . . . . . . . . . . . . . . . . . . . . . . .Hydraulic Fluid 51. . . . . . . . . . . . . . . . . . . . .Hydraulic Hoses 51. . . . . . . . . . . . . . . . . . . .

Engine 52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Cooling System 52. . . . . . . . . . . . . . . . . . . .Air Filter 53. . . . . . . . . . . . . . . . . . . . . . . . . . .Fuel Filter (Lpg) 53. . . . . . . . . . . . . . . . . . . .Electronic Pressure Regulator (Lpg)

(S/N 001500 − 004999) 54. . . . . . . . . . .Lpg Vaporizer 54. . . . . . . . . . . . . . . . . . . . . .Fuel Filter (Gasoline) 54. . . . . . . . . . . . . . . .Engine Belt 55. . . . . . . . . . . . . . . . . . . . . . . .Pcv System 55. . . . . . . . . . . . . . . . . . . . . . . .Spark Plugs − Gm Engines

(S/N 000000 − 004999) 55. . . . . . . . . .Spark Plugs − Mitsubishi Engines

(S/N 005000 − ) 55. . . . . . . . . . . . . .Timing Belt − Gm Engines

(S/N 000000 − 004999) 56. . . . . . . . . .Camshaft And Balance Shaft Belts −

Mitsubishi Engines (S/N 005000 − ) 56Battery 56. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Fuses And Relays 56. . . . . . . . . . . . . . . . . . . . .

Relay Panel Fuses And Relays 56. . . . . . .Engine Harness Fuses And Relays 57. . .Circuit Breakers (Ec−H2o) 57. . . . . . . . . . .

Scrub Brushes And Pads 58. . . . . . . . . . . . . . .Disk Brushes 58. . . . . . . . . . . . . . . . . . . . . . .

Replacing Disk Brushes Or Pad Driver 58. . . . . . . . . . . . . . . . . . .

Replacing Disk Pads 59. . . . . . . . . . . . .Checking The Disk Scrub Head

Stop Bumpers 60. . . . . . . . . . . . . . . .Cylindrical Brushes 60. . . . . . . . . . . . . . . . .

Replacing Or Rotating Cylindrical Brushes 60. . . . . . . . . . . . . . . . . . . . .

Checking Cylindrical Brush Pattern 62.Adjusting The Cylindrical Brush

Taper 63. . . . . . . . . . . . . . . . . . . . . . . .Adjusting The Cylindrical Brush

Width 63. . . . . . . . . . . . . . . . . . . . . . .Side Brush (Option) 64. . . . . . . . . . . . . . . . .

Replacing The Side Brush 64. . . . . . . .

PageFast System 65. . . . . . . . . . . . . . . . . . . . . . . . . .

Replacing The Fast−Pak Carton 65. . . . . .Cleaning The Fast Supply Hose

Connector 66. . . . . . . . . . . . . . . . . . . . . .Cleaning The Fast System Filter Screen 66Cleaning The Fast System Air Pump

Filter (S/N 000000 − 001742) 66. . . . . .Replacing The Fast System Filters

(S/N 001743− ) 66. . . . . . . . . . . . .Ec−H2o Module Flush Procedure 67. . . . . . . .

Cleaning The Ec−H2o Filter Screen 68. . .Squeegee Blades 69. . . . . . . . . . . . . . . . . . . . . .

Replacing (Or Rotating) The Rear Squeegee Blades 69. . . . . . . . . . . . . . . .

Replacing Or Rotating The Side Squeegee Blades 71. . . . . . . . . . . . . . . .

Replacing The Side Brush Squeegee Blade (S/N 000000−002115) (Option) 73

Replacing Or Adjusting The Side Brush Squeegee Blade (S/N 002116− )

(Option) 74. . . . . . . . . . . . . . . . . . . . .Leveling The Rear Squeegee 75. . . . . . . . . . .Adjusting The Rear Squeegee Blade

Deflection 76. . . . . . . . . . . . . . . . . . . . . . . . .Skirts And Seals 77. . . . . . . . . . . . . . . . . . . . . . .

Scrub Head Skirt 77. . . . . . . . . . . . . . . . . . .Recovery Tank Seal 77. . . . . . . . . . . . . . . . .Solution Tank Seals 77. . . . . . . . . . . . . . . . .

Brakes And Tires 78. . . . . . . . . . . . . . . . . . . . . .Brakes 78. . . . . . . . . . . . . . . . . . . . . . . . . . . .Tires 78. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Front Wheel 78. . . . . . . . . . . . . . . . . . . . . . .

Propelling Motor 78. . . . . . . . . . . . . . . . . . . . . . .Pushing, Towing, And Transporting The

Machine 79. . . . . . . . . . . . . . . . . . . . . . . . . . .Pushing Or Towing The Machine 79. . . . . .Transporting The Machine 79. . . . . . . . . . .

Machine Jacking 81. . . . . . . . . . . . . . . . . . . . . .Storage Information 81. . . . . . . . . . . . . . . . . . . .

Freeze Protection (Machines Without Ec−H2o System) 82. . . . . . . . . . . . . . . .

Freeze Protection (Machines With Ec−H2o System) 82. . . . . . . . . . . . . . . .

Priming The Ec−H2o System 84. . . . . . . . .Specifications 85. . . . . . . . . . . . . . . . . . . . . . . . . . . .

General Machine Dimensions/Capacities 85.General Machine Performance 85. . . . . . . . . .Hydraulic System 85. . . . . . . . . . . . . . . . . . . . . .Braking System 87. . . . . . . . . . . . . . . . . . . . . . .Tires 87. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Steering 87. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Fast System 88. . . . . . . . . . . . . . . . . . . . . . . . . .Ec−H2o System 88. . . . . . . . . . . . . . . . . . . . . . .Machine Dimensions 89. . . . . . . . . . . . . . . . . . .

Index 89. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SAFETY PRECAUTIONS

3T20 Gas/LPG 331470 (10−2015)

IMPORTANT SAFETY INSTRUCTIONS − SAVE THESE INSTRUCTIONS

The following precautions are used throughoutthis manual as indicated in their description:

WARNING: To warn of hazards orunsafe practices that could result insevere personal injury or death.

CAUTION: To warn of unsafe practicesthat could result in minor or moderatepersonal injury.

FOR SAFETY: To identify actions that must befollowed for safe operation of equipment.

The following information signals potentiallydangerous conditions to the operator. Know whenthese conditions can exist. Locate all safetydevices on the machine. Report machinedamage or faulty operation immediately.

WARNING: Flammable materials cancause an explosion or fire. Do not useflammable materials in tank.

WARNING: Flammable materials orreactive metals can cause an explosionor fire. Do not pickup.

WARNING: Moving belt and fan. Keepaway.

WARNING: Engine emits toxic gases.Serious injury or death can result.Provide adequate ventilation.

WARNING: Burn hazard. Hot surface. DoNOT touch.

CAUTION: LPG engine will run for afew seconds after key is turned off.Apply parking brake before leavingmachine.

WARNING: This machine containschemicals known to the State ofCalifornia to cause cancer, birth defects,or other reproductive harm.

This machine may be equipped withtechnology that automatically communicatesover the cellular network. If this machine willbe operated where cell phone use is restrictedbecause of concerns related to equipmentinterference, please contact a Tennantrepresentative for information on how todisable the cellular communicationfunctionality.

FOR SAFETY:

1. Do not operate machine:− Unless trained and authorized.− Unless operator manual is read and

understood.− Unless mentally and physically

capable of following machineinstructions.

− If it is not in proper operatingcondition.

− In areas where flammablevapors/liquids or combustible dustsare present.

− In areas that are too dark to safely seethe controls or operate the machineunless operating / headlights areturned on.

− In areas with possible falling objectsunless equipped with overhead guard.

2. Before starting machine:− Check for fuel, oil, and liquid leaks.− Keep sparks and open flame away

from refueling area.− Make sure all safety devices are in

place and operate properly.− Check brakes and steering for proper

operation.− Adjust seat and fasten seat belt.

3. When starting machine:− Keep foot on brake and directional

pedal in neutral.

SAFETY PRECAUTIONS

T20 Gas/LPG 331470 (12−2012)4

4. When using machine:− Use only as described in this manual.− Use brakes to stop machine.− Go slow on inclines and slippery

surfaces.− Reduce speed when turning.− Keep all parts of body inside operator

station while machine is moving.− Use care when reversing machine.− Never allow children to play on or

around machine.− Do not carry passengers on machine.− Always follow safety and traffic rules.− Report machine damage or faulty

operation immediately.− Follow mixing, handling and disposal

instructions on chemical containers.− Follow safety guidlines concerning

wet floors.

5. Before leaving or servicing machine:− Do not park near combustible

materials, dusts, gases, or liquids.− Stop on level surface.− Set parking brake.− Turn off machine and remove key.

6. When servicing machine:− All work must be done with sufficient

lighting and visibility.− Avoid moving parts. Do not wear loose

clothing, jewelry and secure long hair.− Block machine tires before jacking

machine up.− Jack machine up at designated

locations only. Support machine withjack stands.

− Use hoist or jack that will support theweight of the machine.

− Do not power spray or hose offmachine near electrical components.

− Disconnect battery connections beforeworking on machine.

− Avoid contact with battery acid.− Avoid contact with hot engine coolant.− Do not remove cap from radiator when

engine is hot.− Allow engine to cool.− Keep flames and sparks away from

fuel system service area. Keep areawell ventilated.

− Use cardboard to locate leakinghydraulic fluid under pressure.

− All repairs must be performed by atrained service mechanic.

− Do not modify the machine from itsoriginal design.

− Use Tennant supplied or approvedreplacement parts.

− Wear personal protective equipmentas needed and where recommended inthis manual.

For Safety: wear hearing protection.

For Safety: wear protective gloves.

For Safety: wear eye protection.

For Safety: wear protective dust mask.

7. When loading/unloading machineonto/off truck or trailer:− Drain tanks before loading machine.− Lower scrub head and squeegee

before tying down machine.− Turn off machine and remove key.− Use ramp, truck or trailer that will

support the weight of the machine andoperator.

− Use winch. Do not drive the machineonto/off the truck or trailer unless theload height is 380 mm (15 in) or lessfrom the ground.

− Set parking brake after machine isloaded.

− Block machine tires.− Tie machine down to truck or trailer.

SAFETY PRECAUTIONS

5T20 Gas/LPG 331470 (9−06)

The following safety labels are mounted on themachine in the locations indicated. If these or anylabels become damaged or illegible, install a newlabel in its place.

EMISSIONS LABEL − Located on theside of the operator compartment.

FOR SAFETY LABEL −Located on the side of theoperator compartment.

FLAMMABLE SPILLS LABEL −Located on the side of theoperator compartment.

LPG ENGINE LABEL − Locatednext to the ignition switch on theinstrument panel.(LPG machines only)

SAFETY PRECAUTIONS

T20 Gas/LPG 331470 (9−06)6

FAN AND BELT LABEL −Located on enginecompartment panel.

FLAMMABLEMATERIALSLABEL − Locatednext to thesolution tankcovers and on thedetergent tank.

HOT SURFACE LABEL − Located on theside of the bumper, on the exhaust shield,on the hydraulic reservoir, and on thescrub head (disk head machines only).

OPERATION

7T20 Gas/LPG 331470 (4−10)

OPERATION

MACHINE COMPONENTS

S

R

T

U

P

V

Q

W

C

G

F

KB

A

E

D

L

I

M

H

N

J

O

A. Overhead guard (option)B. Instrument panelC. Front shroudD. HeadlightsE. Side brush (option)F. Side squeegeeG. Scrub head access doorH. Debris tray carriage release leverI. Fuel tankJ. Seat shroudK. FaST carton, or ES detergent tank

compartment (option), or ec−H2O System Module compartment (option)

L. Solution tank coverM. Operator seatN. Spray wand − nozzle behind seat (option)O. Flashing light (option)P. Audible backup alarm (option)Q. Recovery tank drain hoseR. Recovery tank coverS. Solution tank drain hoseT. Debris tray carriageU. TaillightsV. Rear squeegeeW. Engine cover

OPERATION

8 T20 Gas/LPG 331470 (4−10)

CONTROLS AND INSTRUMENTS

B

I

F

EG

KA

C

D

HJ

L

A. Steering wheelB. Ignition switchC. Horn buttonD. Steering column tilt knobE. Directional pedalF. Brake pedalG. Parking brake pedalH. Touch panelI. Operating / Hazard Lights switchJ. Spray nozzle switch (option)K. Engine indicator lightsL. ec−H2O system indicator light (option)

OPERATION

9T20 Gas/LPG 331470 (4−10)

TOUCH PANEL

C

B

E

F DG

H

I

J

K

L

M

A

A. Fault indicator lightB. Hour meter / fuel indicator / fault code

indicatorC. 1−STEP scrub buttonD. Scrub vacuum fan / squeegee buttonE. ES (Extended Scrub) button (option)F. FaST button (option)

ec−H2O button (option)G. Solution increase button (+)H. Solution decrease button (−)I. Brush pressure increase button (+)J. Brush pressure decrease button (−)K. Side brush button (option)L. Engine speed buttonM. Supervisor control buttons

OPERATION

10 T20 Gas/LPG 331470 (12−2012)

SYMBOL DEFINITIONS

These symbols are used on the machine toidentify controls, displays, and features.

Hazard light Main brush pressure

Operating lights Solution flow

Spray nozzle Increase

Fault indicator Decrease

Scrub vac fan/squeegee Charging system

1−STEP scrub Engine oil pressure (000000−001997)

ES (extended scrub) Engine oil pressure (001998− )

FaST (foam scrubbing) Check engine

Engine speed Horn

Side brush Jack point

Unleaded fuel only Parking Brake (001998− )

ec−H2O (option)

OPERATION

11T20 Gas/LPG 331470 (5−09)

OPERATION OF CONTROLS

CHARGING SYSTEM INDICATOR

The Charging system indicator comes on whenthe alternator is not operating within the normalrange. If this indicator comes on, stop themachine immediately and correct the problem.

ENGINE OIL PRESSURE INDICATOR

The Engine oil pressure indicator comes on whenthe engine oil pressure falls below the normaloperating pressure. If this indicator comes on,stop the machine immediately and correct theproblem.

CHECK ENGINE INDICATOR

The Check engine indicator comes on when theengine control system detects a fault duringmachine operation.

If this indicator comes on, contact a Tennantservice representative.

PARKING BRAKE INDICATOR (OPTION)

The parking brake indicator comes on when theparking brake is engaged.

OPERATION

12 T20 Gas/LPG 331470 (9−06)

SETTING THE ENGINE SPEED

The engine speed is controlled automaticallywhen the 1−STEP Scrub button is pressed. Whennot scrubbing, press the Engine Speed button toincrease the engine RPM for increased travelspeed. Press the Engine Speed button again toreduce the engine RPM. The two lights above thebutton indicate engine speed setting. When onelight is lit the engine is in the low setting. Whentwo lights are lit the engine is in the high setting.

SIDE BRUSH (OPTION)

The side brush allows users to scrub difficult toreach corners and areas near walls. The sidebrush also widens the scrubbing path.

With the 1−STEP Scrub button activated, pressthe Side brush button to lower and start the sidebrush. The light next to the button will come on.When finished using the side brush, press thebutton again to raise and stop the side brush. Thelight next to the button will turn off. The machinewill default to the last setting used when it ispowered on or off.

FUEL INDICATOR

GASOLINE MACHINES

For gasoline machines, the Fuel indicator displaysthe amount of fuel left in the tank. The faultindicator will flash and a low fuel message willappear when the tank is near empty.

NOTE: Do not use leaded fuels. Leaded fuels willpermanently damage the system oxygen sensorand catalytic converter.

LPG MACHINES

For LPG machines, the Fuel indicator does NOTdisplay the amount of fuel in the LPG tank. It willdisplay all the indicator bars to show that somefuel is in the tank. When the LPG tank is nearempty, the fault indicator will flash and a low fuelmessage will appear.

The LPG fuel gauge on the tank displays theamount of fuel in the LPG tank.

OPERATION

13T20 Gas/LPG 331470 (9−06)

HOUR METER

The Hour meter records the hours the machinewas operated. Use this information to determinemachine service intervals.

SUPERVISOR CONTROL BUTTONS

The Supervisor Control buttons are for accessingthe configuration and diagnostic modes. Onlyproperly trained service personnel and TENNANTrepresentatives should access these modes.

OPERATING LIGHTS

Push the top of the Operating / hazard light switchto turn on the headlights and taillights. Return thelight switch to the center position to turn off thelights.

HAZARD LIGHT (OPTION)

Press the bottom of the Operating / hazard lightswitch to turn on the hazard light, headlights, andtaillights. Return the light switch to the centerposition to turn off the lights.

OPERATION

14 T20 Gas/LPG 331470 (9−06)

OPERATOR SEAT

The operator seat has three adjustments:backrest angle, operator weight, and front toback.

The backrest adjustment knob adjusts the angleof the backrest.

Increase angle: Turn the angle adjustment knobcounterclockwise.

Decrease angle: Turn the angle adjustment knobclockwise.

The weight adjustment knob controls the firmnessof the operator seat.

Increase firmness: Turn the weight adjustmentknob clockwise.

Decrease firmness: Turn the weight adjustmentknob counterclockwise.

Use the gauge next to the weight adjustment knobto help determine seat firmness for the operator.

The front−to−back adjustment lever adjusts theseat position.

Adjust: Pull the lever out and slide the seat to thedesired position. Release the lever to lock theseat into place.

SEAT BELTS

Always fasten and adjust the seat belts beforeoperating the machine.

STEERING COLUMN TILT KNOB

1. Pull the Steering column tilt knob and adjustthe steering column to the desired height.

2. Release the Steering column tilt handle.

OPERATION

15T20 Gas/LPG 331470 (9−06)

BRAKE PEDAL

Press the Brake pedal to stop the machine.

PARKING BRAKE PEDAL

Press the Brake pedal down as far as possibleand use toe to lock the Parking brake pedal intoplace. Press the Brake pedal to release theparking brake. The Parking brake pedal will returnto the unlocked position.

DIRECTIONAL PEDAL

Press the top of the Directional pedal to moveforward and the bottom of the pedal to movebackward. The backup lights will come on whenthe machine is in reverse. The pedal returns tothe neutral position when it is released.

NOTE: An audible alarm will sound and thebackup light will flash when backing the machine ifequipped with the optional backup alarm.

SQUEEGEE PROTECTORS (OPTION)

The rear and side squeegee protectors helpprotect the rear squeegee from being damaged.

To engage the rear squeegee protector, pull thepin, lower the protector bar, and reinsert the pin.

OPERATION

16 T20 Gas/LPG 331470 (5−2016)

HOW THE MACHINE WORKS

This machine can effectively scrub dirty floors.The 1−STEP Scrub button makes it possible toimmediately begin scrubbing by operating all thescrubbing functions.

When in the conventional Scrub mode, a waterand detergent mixture is used to scrub the floor.

When in the optional FaST (Foam scrubbing)mode, the FaST scrubbing system mixes theFaST−PAK concentrate with a small amount ofwater, creating a large volume of expanded wetfoam. The FaST system can be used with allscrubbing applications.

When in the optional ES (Extended Scrub) mode,the dirty solution in the recovery tank is filteredthrough the ES system and returned to thesolution tank for reuse. Detergent is then injectedinto the returned solution to revitalize the cleaningcapability of the solution.

When in the optional ec−H2O (electricallyconverted water) mode, normal water passesthrough a module where it is oxygenated andcharged with an electric current. The electricallyconverted water changes into a blended acidicand alkaline solution forming a neutral pH cleaner.The converted water attacks the dirt, breaks it intosmaller particles, and pulls it off the floor surfaceallowing the machine to easily scrub away thesuspended soil. The converted water then returnsto normal water in the recovery tank. The ec−H2Osystem can be used while double scrubbing.

OPERATION

17T20 Gas/LPG 331470 (12−2012)

BRUSH AND PAD INFORMATION

For best results, use the correct brush type for thecleaning application. Listed below are the brushesand the applications for which each is best suited.

NOTE: The amount and type of soilage play animportant role in determining the type of brushesto use. Contact a Tennant representative forspecific recommendations.

Nylon brush (Disk)* − Softer nylon bristles arerecommended for scrubbing coated floors. Cleanswithout scuffing.

Polyester brush (Cylinderical) − Softer generalpurpose polyester bristles gently clean whilescrubbing. Perfect for sensitive floor surfaces.Polyester does not absorb water so it is preferredover Nylon in wet applications.

PolyPro brush (Cylinderical) − Heavy dutypolypropylene bristles provide a more aggressivecleaning performance and can more easily liftcompacted dirt, debris, and sand while offeringexcellent scrubbing performance.

Polypropylene brush (Cylinderical and Disk)*− General purpose polypropylene bristles liftlightly compacted dirt without scuffing high-glosscoated floors.

Super AB brush (Cylinderical and Disk)* −Nylon fiber impregnated with abrasive grit toremove stains and compacted dirt. Aggressiveaction on any surface. Performs well on buildup,grease, or tire marks.

* This brush is also available for the side brush.

Stripping pad − This brown pad is for strippingfloors. Quickly and easily cuts through old finish toprepare the floor for recoating.

Scrubbing pad − This blue pad is for scrubbingfloors. Removes dirt, spills, and scuffs. Leaves aclean surface ready for re-coating.

Buffing pad − This red pad is for buffing floors.Quickly cleans and removes scuff marks whilepolishing the floor to a high gloss.

Polishing pad − This white pad is for polishingfloors. Maintains a high gloss. Use for buffing verysoft finishes and lower traffic areas, and polishingsoft waxes on wood floors.

High productivity pad − This black pad is foraggressively stripping floor finishes/sealers or forvery heavy−duty scrubbing. This pad can only beused with the grip pad driver, not the tufted paddriver.

Surface preparation pad − This maroon pad isfor very aggressive floor stripping withoutchemicals.

Grip pad driver − The grip−face backing allowspads to be fully used and holds pads in placewithout penetrating the pad. The spring−activatedcentering device works with all Tennant pads andallows for fast, easy pad replacement.

Tufted pad driver − Standard pad driver hasshort bristles, or “tufts,” on the back to hold thepad in place. This driver works with all Tennantpads except the black high productivity pad.

OPERATION

18 T20 Gas/LPG 331470 (2−2016)

WHILE OPERATING THE MACHINE

Pick up oversized debris before scrubbing. Pickup wire, string, plastic wrap, twine, large pieces ofwood, or any other debris that could becomewrapped around or tangled in the brushes. Do notuse where excessive debris is present such asleaves, paper, etc.

Drive as straight a path as possible. Avoidbumping into posts or scraping the sides of themachine. Overlap the scrub paths by severalcentimeters (a few inches).

Avoid turning the steering wheel too sharply whenthe machine is in motion. The machine is veryresponsive to the movement of the steering wheel.Avoid sudden turns, except in emergencies.

Adjust the machine speed, brush pressure, andsolution flow as required when scrubbing. Use thelowest brush pressure and solution flow settingsfor best performance. If the machine is equippedwith the FaST or ec−H20 system, use the FaSTor ec−H20 system for the best scrubbing results.

Keep the machine moving to prevent damagingfloor finishes.

If poor cleaning performance is observed, stopcleaning and refer to MACHINETROUBLESHOOTING in this manual.

Perform the Daily Maintenance Procedures aftereach use (see MACHINE MAINTENANCE in thismanual).

Drive the machine slowly on inclines. Use thebrake pedal to control machine speed ondescending inclines. Scrub with the machine upinclines rather than down inclines.

FOR SAFETY: When using machine, go slowlyon inclines and slippery surfaces.

Do not operate machine in areas where theambient temperature is above 43� C (110� F). Donot operate scrubbing functions in areas wherethe ambient temperature is below freezing 0� C(32� F).

The maximum rated incline for scrubbing with themachine is 14%. The maximum rated inclineduring transport of the machine is 18%.

OPERATION

19T20 Gas/LPG 331470 (12−2012)

PRE−OPERATION CHECKLIST

� Check the hydraulic fluid level.

� Check the fuel level.

� Check the machine for fluid leaks.

� Check the condition of the main brushes.Remove string, banding, plastic wrap, or otherdebris wrapped around the brushes.

� Cylinderical brushes: Check that the debristray is empty and clean.

� Check the main brush compartment rightskirts, seals, and squeegee for damage andwear.

� Side Brush Option: Check the condition of thebrush. Remove string, banding, plastic wrap,or other debris wrapped around the brush.

� Side Brush Option: Check the condition of theside brush squeegee.

� Check the radiator and hydraulic cooler finsfor debris.

� Check the engine coolant level.

� Check the engine oil level.

� Check the main brush compartment left skirts,seals, and squeegee for damage and wear.

� Check the left solution tank cover seal fordamage and wear.

� Check the recovery tank cover seal fordamage and wear.

� Clean the vacuum fan debris filter.

� Drain and clean the recovery tank.

� ES Option: Drain and clean the solution tank,float sensor, and ES filter.

� Check the right solution tank cover seal fordamage and wear.

� Check the squeegee hose for debris orblockage.

� Check the squeegees for damage, wear, anddeflection adjustment.

� FaST Scrubbing: Check the FaST−PAKconcentrate agent level. Replace carton asneeded. See the INSTALLING THEFaST−PAK CARTON section of the manual.

� FaST Scrubbing: Ensure all conventionalcleaning agents are drained and rinsed fromthe solution tank.

� FaST Scrubbing: Ensure the solution tank isfilled with clear cool water only.

� Check the headlights, taillights, and safetylights.

� Check the brakes and steering for properoperation.

� Check the service records to determinemaintenance requirements.

OPERATION

20 T20 Gas/LPG 331470 (12−2012)

CHANGING THE LPG TANK

FOR SAFETY: Before leaving or servicingmachine, stop on level surface, set parkingbrake, turn off machine, and remove key.

1. Open the side access door.

2. Close the LPG tank service valve.

3. Start the machine and operate the engineuntil it stops from lack of fuel. Turn off themachine.

4. Lift the operator seat open and engage theseat latch so the seat remains open.

FOR SAFETY: When servicing machine, keepflames and sparks away from fuel systemservice area. Keep area well ventilated.

5. Put on gloves and remove the quickdisconnect tank coupling.

6. Disengage the mounting strap and removethe empty LPG fuel tank.

7. Align the hole in the tank collar with thecentering pin and carefully place the full LPGtank onto the tray. Secure the tank withmounting strap.

8. Connect the LPG fuel line to the tank servicecoupling. Make sure the tank service couplingis clean and undamaged and that it matchesthe fuel line coupling.

9. Slowly open the tank service valve and checkfor leaks. If a leak is found, immediately closethe service valve and inform the appropriatepersonnel.

OPERATION

21T20 Gas/LPG 331470 (12−2012)

STARTING THE MACHINE

1. LPG powered machines: Slowly open theliquid service valve.

NOTE: Opening the service valve too quickly maycause the service check valve to stop the flow ofLPG fuel. If the check valve stops the fuel flow,close the service valve, wait a few seconds, andslowly open the valve again.

2. Sit in the operator seat and press the brakepedal or set the parking brake.

FOR SAFETY: When starting machine, keepfoot on brake and directional pedal in neutral.

3. Turn the ignition switch key until the enginestarts.

NOTE: Do not operate the starter motor for morethan 10 seconds at a time or after the engine hasstarted. Allow the starter to cool 15−20 secondsbetween starting attempts or damage to thestarter motor may occur.

4. Allow the engine and hydraulic system towarm up for three to five minutes.

WARNING: Engine emits toxic gases.Severe respiratory damage orasphyxiation can result. Provideadequate ventilation. Consult with yourregulatory authorities for exposurelimits. Keep engine properly tuned.

5. Turn on lights.

TURNING OFF THE MACHINE

1. Stop the machine and turn off all scrubbingfunctions.

2. Turn the ignition switch key counter clockwiseto turn off the machine. Remain in theoperator seat until the engine is off.

CAUTION: LPG engine will run for a fewseconds after key is turned off. Applyparking brake before leaving machine.

NOTE: To protect engine emission componentson LPG powered machines, the engine willcontinue to operate for a few seconds after theignition switch is turned off.

FOR SAFETY: Before leaving or servicingmachine, do not park near combustiblematerials, dust, gases, or liquids. Stop onlevel surface, set parking brake, turn offmachine, and remove key.

OPERATION

22 T20 Gas/LPG 331470 (12−2012)

FILLING THE SOLUTION TANK

FOAM SCRUBBING (FaST MODE) / ec−H2OSCRUBBING (ec−H2O MODE)


1. Open either the left or right solution tank fillcover.

2. Fill the solution tank with only clean COOLWATER (less than 21°C / 70°F). DO NOT usehot water or add any conventional floorcleaning detergents or FaST system failuremay result.

WARNING: Flammable materials cancause an explosion or fire. Do not useflammable materials in tank(s).

NOTE: To install or change the FaST−PAKcarton, see the REPLACING THE FaST−PAKCARTON section of the manual.

NOTE: Do not use the FaST or ec−H2O systemwhen there are conventional cleaning detergentsin the solution tank. Drain, rinse, and refill thesolution tank with clear cool water beforeoperating the FaST or ec−H2O system.Conventional cleaning detergents may cause aFaST or ec−H2O system failure.

CONVENTIONAL SCRUBBING MODE


1. Open either the left or right solution tank fillcover.

2. Partially fill solution tank with water (not toexceed 60°C / 140°F). Pour the requiredamount of detergent into the solution tank. Fillthe solution tank with water until the level isjust below the indicator tab.


ATTENTION: For Conventional Scrubbing,only use recommended cleaning detergents.Machine damage due to improper detergentusage will void the manufacturer’s warranty.

NOTE: Pour a recommended foam controlsolution into the recovery tank if excessive foamappears. For specific detergentrecommendations, contact a TENNANTrepresentative.

OPERATION

23T20 Gas/LPG 331470 (9−06)

ES (EXTENDED SCRUB) MODE WITHAUTO−FILL

FOR SAFETY: Before leaving or servicingmachine, stop on level surface, set parkingbrake, and turn off machine.

1. Connect the hose from the water source (notto exceed 60°C / 140°F) to the auto−fillconnection.

2. Turn the ignition switch to the on position(without starting) and turn on the watersource. The auto−fill automatically fills thetanks to the proper level.

3. Fill the detergent tank with the properdetergent.

ATTENTION: For ES Scrubbing, only userecommended low−foaming cleaningdetergents. Machine damage due to the use ofimproper detergent will void themanufacturer’s warranty.

ES (EXTENDED SCRUB) MODE − MANUALLYFILLING TANK


1. Open either the left or right solution tankcover and fill the solution tank with water (notto exceed 60°C / 140°F) until the level is justbelow the indicator tab.

2. Open the recovery tank cover and fill therecovery tank with water (not to exceed 60°C/ 140°F) until the recovery tank isapproximately half full.


OPERATION

24 T20 Gas/LPG 331470 (4−10)

SETTING SCRUB MODES

Before scrubbing, determine which scrub modewill be used (FaST, ES or conventional). Then setthe scrub brush pressure and adjust the solutionflow levels.

SETTING FaST MODE

The FaST button enables the FaST system tocome on when the 1−STEP Scrub button isactivated. The light next to the button will comeon. The machine will default to the last settingused when it is powered on or off.

SETTING ES (EXTENDED SCRUB) MODE

The ES button enables the ES system to come onwhen the 1−STEP Scrub button is activated. Thelight next to the button will come on. The machinewill default to the last setting used when it ispowered on or off.

NOTE: When the ES system is turned on there isa slight delay before the ES pump beginsoperating.

SETTING ec−H2O MODE

The ec−H2O button enables the ec−H2O systemto come on when the 1−STEP Scrub button isactivated. The light next to the button will comeon. The machine will default to the last settingused when it is powered on or off.

NOTE: Storage or transporting machinesequipped with ec−H2O in freezing temperaturesrequires special procedures. Follow the freezeprotection procedure located in the STORAGEINFORMATION section.

SETTING BRUSH PRESSURE

Under normal cleaning conditions, the brushpressure should be set to the minimum setting(the bottom light). Under heavy grime conditions,the brush pressure can be set to a higher setting.Travel speed and floor conditions will affectcleaning performance.

With the 1−STEP Scrub button activated, presseither the Brush Pressure increase button (+) orthe Brush Pressure decrease button (−) to set thebrush pressure for the surface being cleaned. Ifbrushes are worn, it may be necessary toincrease the brush pressure. The machine willdefault to the last setting used when it is poweredon or off.

OPERATION

25T20 Gas/LPG 331470 (4−10)

SETTING SOLUTION FLOW

With the 1−STEP Scrub button activated, presseither Solution increase button (+) or Solutiondecrease button (−) to set the solution flow level.Travel speed and floor conditions will affectscrubbing performance. The machine will defaultto the last setting used when the machine ispowered on or off.

NOTE: In the ES and FaST modes, the solutionflow buttons control both the solution ANDdetergent flow levels.

To turn off all solution and detergent flow, pressthe Solution decrease button (−) until all indicatorlights are off.

CONVENTIONAL, FaST, AND ec−H2OSOLUTION FLOW

Under normal soilage conditions the solution flowlevel should be set to the lowest setting (thebottom light). Under heavy grime conditions, thesolution flow level should be set to the highersettings (middle or top lights).

ES (EXTENDED SCRUB) SOLUTION FLOW

For ES machines, the detergent flow is turnedoff when the solution flow is in the lowestsetting (one light). Under normal soilageconditions, the solution flow level should bealternated between the middle and lowest setting.The middle setting (two lights) allows solutionAND detergent flow. The lowest setting (one light)allows solution flow WITHOUT adding detergent.Detergent does not have to be continuouslyadded with the solution flow to attain effectivescrubbing results.

OPERATION

26 T20 Gas/LPG 331470 (4−10)

SCRUBBING

The 1−STEP Scrub button operates all thescrubbing functions.

FOR SAFETY: Do not operate machine, unlessoperator manual is read and understood.

1. Start the machine.

NOTE: Make sure the scrub modes / settings areset before scrubbing.

2. Press the 1−STEP Scrub button. The light onthe button will come on. All the presetscrubbing functions will turn on.

NOTE: DO NOT turn on the FaST or ec−H2Osystem during conventional scrubbing.Conventional cleaning detergents could cause aFaST or ec−H2O system failure. Drain, rinse, andrefill the solution tank with cool clean water beforeoperating the FaST or ec−H2O system.

3. Release the parking brake, then press theDirectional pedal to begin scrubbing.

WARNING: Flammable materials orreactive metals can cause an explosionor fire. Do not pick up.

FOR SAFETY: When using machine, go slowon inclines and slippery surfaces.

NOTE: The squeegee automatically rises whenthe machine is driven backwards. This preventsdamaging the squeegee.

NOTE:The ec−H2O system indicator light will notturn on until the machine starts scrubbing.

ec−H2O Model: If an alarm sounds and theec−H2O system indicator light begins to blink red,the ec−H2O module must be flushed to resumeec−H2O operation (See ec−H2O MODULEFLUSH PROCEDURE).

NOTE: When the alarm sounds and the lightblinks red, the machine will bypass the ec−H2Osystem. To continue scrubbing, press the ec−H2Obutton to turn off the ec−H2O system.

ATTENTION: (ec−H2O model) Do not allowsolution tank to run dry. ec−H2O modulefailure may result if operated without water foran extended period.

ec−H2O SYSTEMINDICATOR LIGHTCODE

CONDITION

Solid green Normal operation

Blinking red Flush ec−H2O module

Solid red Contact Service Center

4. Release the directional pedal and press thebrake pedal to stop the machine.

5. Press the 1−STEP Scrub button to stopscrubbing. The light next to the button will gooff and scrubbing functions will stop after ashort delay.

OPERATION

27T20 Gas/LPG 331470 (4−10)

DOUBLE SCRUBBING

For heavily soiled areas, use the double scrubbingmethod.

Double scrubbing can be performed using the FaST SCRUBBING SYSTEM (option), ec−H2O SCRUBBING SYSTEM (option) or CONVENTIONAL SCRUBBING methods.

Side brush option (S/N 000000−002115): Beforedouble scrubbing, manually lock the side brushsqueegee into the raised position. Pull the pinfrom the side brush squeegee bracket, manuallyraise the side squeegee to the upper position,then reinsert the brush pin.

Side brush option (S/N 002116− ): Beforedouble scrubbing, remove the side brush bumper.Pull the pins and remove the squeegee bumper.

Press the 1−STEP Scrub button, and then theScrub vacuum fan/squeegee button. The lightabove the Scrub vacuum fan/squeegee button willturn off, the squeegee will rise, and the vacuumfan will stop operating. Scrub the heavily soiledarea.

FOR SAFETY: When using machine, go slowon inclines and slippery surfaces.

Let the cleaning solution soak on the floor for5−15 minutes. Then place the side squeegee intothe lower position and lock into place with the pin.

Press the Scrub vacuum fan/squeegee buttonagain to lower the squeegee and turn on thevacuum fan. The light above the button will comeon. Scrub the floor a second time to pick up thecleaning solution.


NOTE: To turn off the solution flow whenscrubbing the area a second time, repeatedlypress the Solution decrease button (−) until alllights above the button are off.

NOTE: Double scrubbing is not recommended inareas where the cleaning solution will run underracks or damage products.

OPERATION

28 T20 Gas/LPG 331470 (9−06)

WATER PICKUP MODE (NO SCRUBBING)

The machine can be used to pick up water ornon−flammable liquid spills without scrubbing.

To pick up water or non−flammable liquid spills,make sure the 1−STEP Scrub button is notactivated. The light next to the button must be off.


Press the Scrub vacuum fan/squeegee button.The light above the button will come on, thesqueegee will lower, and the vacuum fan will startoperating. Pick up the water or non−flammableliquid spill.

OPERATION

29T20 Gas/LPG 331470 (12−2012)

EMPTYING AND CLEANING THE DEBRISTRAY − CYLINDRICAL SCRUB HEADS ONLY

1. Drive the machine to a debris dump site.


2. Press the debris tray carriage release lever.

3. Pull the debris tray carriage open.

4. Pull the debris tray from the carriage.

5. Empty the contents from the debris tray.

6. Remove the debris screen from the debristray.

7. Rinse the debris screen and the debris tray.

OPERATION

30 T20 Gas/LPG 331470 (9−06)

8. Disconnect the vacuum hose from the rearcoupling.

9. Spray water through the port located insidethe vacuum coupling to rinse debris from thedebris tray coupling.

10. Reconnect the vacuum hose to the rearcoupling.

11. Reinstall the debris screen into the debristray.

12. Align the debris tray with the debris traycarriage, use the handle to guide the debristray into the debris tray carriage, and slide thehandle back into the debris tray.

13. Lift slightly on the debris tray carriage handleand push the debris tray carriage closed untilit locks shut.

OPERATION

31T20 Gas/LPG 331470 (12−2012)

DRAINING AND CLEANING THE RECOVERYTANK

Drain and clean the recovery tank daily or whenthe recovery tank full indicator comes on.

Clean the outside of the recovery tank with vinylcleaner.


DRAINING THE RECOVERY TANK WITH THEDRAIN HOSE

1. Lift the recovery tank cover.

2. Place the recovery tank drain hose nozzlenext to a floor drain.

3. Open the recovery tank Variable Drain Valve.

4. Rinse dirt and debris down through the drainhole in the demister tray and flush thevacuum hose.

NOTE: DO NOT use steam to clean tanks.Excessive heat can damage tanks andcomponents.

5. Remove the vacuum screen from therecovery tank and rinse the screen.

OPERATION

32 T20 Gas/LPG 331470 (12−2012)

6. Rinse the float sensor.

7. ES machines: Rinse the ES filter. Ifnecessary, remove the ES filter from therecovery tank.

8. Rinse dirt and debris towards the recoverytank drain. Allow the recovery tank to drain.

9. Close the recovery tank Variable Drain Valve.

10. Reinstall the recovery tank drain hose ontothe back of the recovery tank and close therecovery tank cover.

DRAINING THE RECOVERY TANK WITH THEDRAIN PLUG

Use the drain plug to drain the recovery tank if thetank is draining slowly or if the drain hose isplugged.

1. Park the machine so the larger drain in therecovery tank is positioned over the disposaldrain. Set the parking brake.


2. Machines equipped with cylindrical scrubheads only: To avoid water and debris fromgetting in the debris tray, open the debriscarriage and remove the debris tray.

OPERATION

33T20 Gas/LPG 331470 (12−2012)

3. Lift the drain plug handle and remove thedrain plug from the tank.

4. Open the recovery tank Variable Drain Valve.

5. Remove the recovery tank drain hose fromthe back of the recovery tank, then rinse thedirt and debris from the hose into the tank.

6. Rinse dirt and debris out the open drain.

7. Clean the drain hole, then reinsert the drainplug. Push the handle down to tighten. Besure the drain plug is fully seated beforetightening.

NOTE: If necessary, turn the handle clockwise fora tighter fit and counterclockwise for a looser fit.

OPERATION

34 T20 Gas/LPG 331470 (12−2012)

8. Close the recovery tank Variable Drain Valve.

9. Reinstall the recovery tank drain hose ontothe back of the recovery tank.

10. Machines equipped with cylindrical scrubheads only: Reinstall the debris tray into thedebris tray carriage and close the carriage.

11. Close the recovery tank cover.

DRAINING AND CLEANING THE SOLUTIONTANK

The solution tank on non−ES machines does notrequire regular maintenance. If deposits form onthe bottom of the tank, rinse the tank with astrong blast of warm water.

The solution tank on machines with the ES optionshould be drained and cleaned daily.

Clean the outside of the solution tank with vinylcleaner.


1. Open the solution tank cover(s).

2. Place the solution tank drain hose nozzle nextto a floor drain.

OPERATION

35T20 Gas/LPG 331470 (12−2012)

3. Open the solution tank Variable Drain Valve.

4. Rinse the solution tank. Flush dirt and debristoward the solution tank drain.

5. Rinse the float sensor and the screen filter.Allow the solution tank to drain.

6. Close the solution tank Variable Drain Valve.

7. Reinstall the solution tank drain hose onto theback of the recovery tank.

8. Close the solution tank cover(s).

OPERATION

36 T20 Gas/LPG 331470 (12−2012)

FAULT INDICATOR(S)

This machine is equipped with two visualindicators, a red indicator light and an LCD (liquidcrystal display).

The red indicator light will blink continuouslyindicating that a fault has occurred.

The LCD will display a fault code. If there is morethan one fault, each fault will alternately display.

All faults are also accompanied by an audiblealarm to alert the operator a fault has occurred.

To reset the fault indicators, turn the machine off,then eliminate the cause of the fault. The faultindicator will reset when the machine is restarted.

Refer to the table below to determine the causeand remedy for the fault.

Fault Code(Displayed in LCD)

Cause(s) Result Remedy

F3: Clogged Hyd Hydraulic filter is clogged − Replace hydraulic filter.F6: Sol. Tank E. Solution tank is empty − Fill solution tank.F7: Rec. Tank Full Recovery tank is full Terminates scrubbing

functionsPress the Scrub vacuumfan/squeegee button for oneminute of extended waterpickup. Empty recoverytank.ES models: activate the ESsystem to prevent this.

F8: High Eng Temp*GM engine (S/N000000−004999)

Engine temperature is high − Shut off machine.Contact TENNANT servicerepresentative.

F9: High Hyd Temp Hydraulic fluid temperatureis high

− Shut off machine.Contact TENNANT servicerepresentative.

F10: Low Fuel Low fuel − Fill fuel tank (gasoline).Replace fuel tank (LPG)

F11: Open Scb Vac(Optional)

Scrub vacuum hose is notconnected

− Connect vacuum hose tosqueegee assembly.

F12: Seat Sw Open(Optional)

Operator not in the seatwhile engine is running andparking brake not engaged

Engine will shut off Engage parking brakebefore leaving the machine.

*NOTE: Mitsubishi engines machine serial number 005000 and above will display a “check engine”indicator and will automatically shut the machine off if the coolant is too hot.

OPERATION

37T20 Gas/LPG 331470 (9−06)

CONDITIONS / WARNINGS

Condition codes are typically caused by theoperator attempting to activate modes that areunavailable. The code will appear in the LCD.

Refer to the table below to determine the cause ofthe condition.

Condition Code(Displayed in LCD)

Condition(s) Description

C3: No FaST Mode FaST mode unavailable Only machines equipped with FaSTsystem can be operated in FaST mode.

C4: No ES Mode ES mode unavailable Only machines equipped with ES systemcan be operated in ES mode.

C5: No ES/FaST ES and FaST systems unavailable Only machines equipped with ES or FaSTsystem can be operated in these modes.

C6: No Side Brush Side brush unavailable Side brush not allowed tooperate by itself.

OPERATION

38 T20 Gas/LPG 331470 (12−2012)

OPTIONS

SPRAY NOZZLE (OPTION)

The spray nozzle is used to clean the machineand surrounding areas. The solution tank providesa water/solution supply for the spray nozzle. Awand is included with the spray nozzle.

NOTE: Do NOT get water on electroniccomponents when using the spray nozzle to cleanthe machine.


1. Turn the key to the on position (withoutstarting the machine).

NOTE: The spray nozzle can be operated whilethe engine is running, but it is recommended toturn the engine off while using the spray nozzle.

2. Press the top of the Spray nozzle switch toturn on the water supply. The light on theswitch will come on when the spray nozzle isactivated.

3. Remove the spray nozzle from the storagearea and clean as required.

FOR SAFETY: When using pressurized air orwater, wear eye protection.

4. If cleaning a hard to reach area, install thewand onto the spray nozzle.

5. Twist the off/on knob to turn on the wand.

6. When finished cleaning, place the spraynozzle and wand back into their storagelocations.

7. Press the bottom of the Spray nozzle switchto turn off the water supply.

OPERATION

39T20 Gas/LPG 331470 (12−2012)

VACUUM WAND (OPTION)


1. Remove the vacuum wand sections and hosefrom the storage bag located on top therecovery tank cover.

2. Disconnect the vacuum hose from the rearcoupling and attach the wand hose.

3. Assemble the wand and nozzle.



5. Verify that the 1−STEP Scrub button is off.The light next to the button will be off.

6. Press the Scrub vacuum fan/squeegeebutton. The light above the button will turn onand the vacuum fan will start operating.

NOTE: The squeegee will lower.

7. Clean the spill or debris.

8. When finished vacuuming, press the Scrubvacuum fan/squeegee button to turn off thevacuum. The light above the button will turnoff.

9. Turn off the machine.

10. Disassemble the vacuum wand sections andhose and return them to the storage bag.

11. Reattach the vacuum hose to the rearcoupling.

OPERATION

40 T20 Gas/LPG 331470 (12−2012)

POWER WAND (OPTION)

The power wand uses both the vacuum andsolution systems. The power wand allows theuser to scrub floors that are out of reach of themachine.


1. Remove the power wand equipment from thestorage bag on top the recovery tank cover.

2. Remove the squeegee suction hose from thetop of the rear squeegee assembly.

3. Connect the vacuum wand hose and thesqueegee vacuum hose with the adapter.

4. Attach the solution hose to thequick−disconnect fitting. Push the connectorin until it stops. Pull on the hose to ensure it isconnected.

5. Attach the other ends of the solution andvacuum hoses to the power wand.



7. Verify that the 1−STEP Scrub button is off.The light next to the button will be off.

8. Press the Scrub vacuum fan/squeegeebutton. The light above the button will turn onand the vacuum fan will start operating.

NOTE: The squeegee will also lower.

OPERATION

41T20 Gas/LPG 331470 (9−06)

9. Press the top of the Spray nozzle switch toturn on the water supply.

10. Squeeze the solution lever on the powerwand to spray solution onto the floor. Scrubthe floor with the brush side of the cleaningtool.

11. Vacuum up the solution by turning over thecleaning tool so the squeegee side is down.

If the cleaning tool is hard to push or is notpicking up the solution very well, adjust theroller wheels on the tool by turning the blackadjustment knob.

NOTE: The wheels are properly adjusted whenthe squeegee blade deflects slightly while thecleaning tool is pushed back and forth.

12. When finished scrubbing, press the Scrubvacuum fan/squeegee button to turn off thevacuum and press the bottom of the Spraynozzle switch to turn off the water supply.

13. Turn off the machine.

14. Disconnect the power wand vacuum hosefrom the squeegee suction hose and thesolution hose from the quick−disconnectfitting.

15. Reconnect the vacuum hose to the rearsqueegee assembly.

16. Disassemble the power wand assembly andreturn it to the storage bag.

OPERATION

42 T20 Gas/LPG 331470 (9−06)

MACHINE TROUBLESHOOTING

Problem Cause Remedy

Trailing water−poor or nowater pickup

Scrub vacuum fan turned off Turn on vacuum fan

Worn squeegee blades Rotate or replace squeegee blades

Squeegee out of adjustment Adjust squeegee

No detergent in solution tankcausing squeegee to chatter

Add detergent to solution tank

Vacuum hose clogged Flush vacuum hoses

Vacuum screen dirty Clean vacuum screen

Recovery tank cover seals worn Replace seals

Debris caught in squeegee Remove debris

Vacuum hose to squeegee orrecovery tank disconnected ordamaged

Reconnect or replace vacuum hose

Recovery tank cover notcompletely closed

Check for obstructions and makesure cover is closed properly

Scrub vacuum fan will notturn on

Vacuum fan / squeegee buttonturned off

Turn on Vacuum fan / squeegeebutton

Recovery tank full Drain recovery tank

Foam filling recovery tank Empty recovery tank

Use less detergent/or usedefoamer

Recovery tank sensor dirty or stuck Clean or replace sensor

Little or no solution flow tothe floor (ConventionalScrubbing Mode)

Solution tank empty Fill solution tank

Solution flow turned off Turn on solution flow

Solution supply lines plugged Flush solution supply lines

Poor scrubbing performance 1−STEP Scrub button not on Turn on 1−STEP Scrub button

Improper detergent or brushes Call Tennant service representative

Solution tank empty Fill solution tank

Debris caught on main brushes Remove debris

Worn main brushes Replace brushes

Brush pressure set too light Increase brush pressure

OPERATION

43T20 Gas/LPG 331470 (9−10)

Problem Cause Remedy

FaST System does notoperate

FaST button is turned off Turn on the FaST button

Clogged FaST−PAK supply hoseand/or connector

Soak connector and hose in warmwater and clean

FaST−PAK carton is empty or notconnected

Replace FaST−PAK carton and/orconnect supply hose

FaST system is not primed To prime, operate the FaSTsolution system for a few minutes

Clogged filter screen Drain solution tank, remove andclean filter screen

Blown fuse Call Tennant service representative

Faulty solution pump Call Tennant service representative

ES System does not operate ES button is turned off Turn on ES button

ES sensor in tank dirty Clean sensor

Clogged ES pump filter Clean ES filter

Water level in recovery tank toolow

Fill recovery tank about half full

Water level in solution tank too low Fill solution tank

ec−H2O Model:ec−H2O system indicatorlight blinks red and the alarmsounds

Mineral deposit build−up in module Flush module (See ec−H2OMODULE FLUSH PROCEDURE),if indicator light starts flashingwithin 1−10 seconds, repeat flushprocedure. If indicator light startsflashing after a minute ofscrubbing, the water may have lowconductivity.

Low water conductivity Add 8ml of salt to every 40 L ofwater.

ec−H2O Model: ec−H2O system indicatorlight solid red

Defective module Contact Service Center

ec−H2O Model: ec−H2O system indicatorlight does not turn on

Defective light or module Contact Service Center

ec−H2O Model: No water flow

Clogged module Contact Service Center

Defective solution pump Replace solution pump

Clogged filter screen Clean filter screen

MAINTENANCE

44 T20 Gas/LPG 331470 (9−06)

MAINTENANCE

1

2

3

4

5

6

7

89

19

10

12

14

13

15

16

11

17

18

7

20

20

MAINTENANCE

45T20 Gas/LPG 331470 (5−2015)

MAINTENANCE CHART

The table below indicates the Person Responsible for each procedure.O = Operator.T = Trained Personnel.

IntervalPersonResp. Key Description Procedure

Lubricant/Fluid

No. ofServicePoints

Daily O 1 Engine Check oil level EO 1Check coolant level in reser-voir

WG 1

Check belt tension − 1O 10 Hydraulic fluid reservoir Check fluid level HYDO 1O 8, 9 Tank cover seals Check for damage or wear − 3O 3, 14 Main brushes (Cylindri-

cal)Check for damage and wear − 2

O 3, 14 Main brushes or pads(Disk)

Check for damage and wear − 3

O 4 Side brush (option) Check for damage and wear − 1Check squeegee blade fordamage and wear

− 1

O 6 Rear squeegee blade Check for damage and wear − 1Check deflection − 1

O 7 Side squeegee blades Check for damage and wear − 2O 8 Recovery tank Clean − 1O 8 Recovery tank, ES

mode (option)Clean ES filter − 1

O 9 Solution tank, ES mode(option)

Clean − 1

O 5 Debris tray Clean debris tray, screen,and hose

− 1

NOTE: Change the hydraulic fluid, filter, and suction strainer, indicated (*), after every 800 hours formachines NOT originally equipped with TennantTrue premium hydraulic fluid. (See Hydraulics section).

LUBRICANT/FLUID

EO Engine oil, 5W30 SAE−SG/SH only.. . . .HYDO TennantTrue premium hydraulic fluid or equivalent.WG Water and ethylene glycol anti-freeze, −34� C (−30� F). . . NOTE: More frequent maintenance intervals may be required in extremely dusty conditions.

MAINTENANCE

46 T20 Gas/LPG 331470 (5−2015)

The table below indicates the Person Responsible for each procedure.O = Operator.T = Trained Personnel.


Lubricant/Fluid

No. ofServicePoints

50Hours

O 16 FaST / ec−H2O filterscreen (Option)

Clean − 1

O 3, 14 Main brushes (Cylindrical)

Rotate front to rear − 2

T 3, 14 Main brushes (Cylindrical)

Check brush pattern andadjust if needed

− 2

T 13 Front wheel Torque wheel nuts (after initial 50 hours only)

− 1

T 15 Battery Clean and tighten batterycable connections (after initial 50 hours only)

− 1

T 1 Engine Check belt tension − 1100Hours

T 19 Radiator Clean core exterior − 1T 19 Hydraulic cooler Clean core exterior − 1T 1 Engine Change oil and filter EO 1

Drain LPG vaporizer oilbuildup

− 1

Engine, GM (S/N001500−004999)

Drain oil from electronicpressure regulator (EPR)

− 1

O 13, 20 Tires Check for damage − 3T 6 Rear squeegee casters Lubricate SPL 2T 6 Rear squeegee Check leveling − 1O 2 Scrub head skirt Check for damage or wear − 1

T 3, 14 Disk scrub head stopbumper

Check for damage or wear − 2

200Hours

T 12 Front wheel supportbearings

Lubricate SPL 2

T 17, 18 Torque tube (Cylindricalbrushes)

Lubricate SPL 4

T 3, 14 Torque tube (Diskbrushes)

Lubricate SPL 4

T 3 Pivot shaft (Diskbrushes)

Lubricate SPL 4

T 12 Steering cylinder Lubricate SPL 1T 1, 19 Radiator hoses and

clampsCheck for tightness andwear

− 2

T 11 Brake pedal Check adjustment − 1

T 16 FaST air filter (Option)(S/N 000000−001742)

Clean − 1

400Hours

T 1 Engine, GM (S/N000000−004999)

Clean and re−gap or replacespark plugs

− 4

T 1 Engine Replace air filter − 1Replace fuel filter − 1

T 20 Rear wheel bearings Check, lubricate, and adjust SPL 2

MAINTENANCE

47T20 Gas/LPG 331470 (5−2015)


Lubricant/Fluid

No. ofServicePoints

800Hours

T 10 Hydraulic reservoir Replace filler cap HYDO 1T 1 Engine, GM (S/N

000000−004999)Check timing belt − 1

T − Hydraulic hoses Check for wear and damage − AllT 1, 19 Cooling system Flush WG 2T 13 Propelling motor Torque shaft nut − 1T 13 Front wheel Torque wheel nuts − 1

T 15 Battery Clean and tighten batterycable connections

− 1

1000Hours

T 16 FaST system filters(S/N 001743− )

Replace − 2

T 1 Engine, Mitsubishi (S/N 005000− )

Replace spark plugs − 4

T 1 Engine Inspect PCV system − 1T 1, 19 Radiator hoses Check for cracks or

deterioration− 2

1200Hours

T 10 Hydraulic fluid filter * Replace fluid filter − 1

2000Hours

T 1 Engine, GM (S/N000000−004999)

Replace timing belt − 1

2400Hours

T 10 Hydraulic fluid reservoir * Replace strainer outlet − 1* Change hydraulic fluid HYDO 1

5000Hours

T 1 Engine, Mitsubishi (S/N 005000− )

Replace camshaft andbalance shaft belts

− 2

NOTE: Change the hydraulic fluid, filter, and suction strainer, indicated (*), after every 800 hours formachines NOT originally equipped with TennantTrue premium hydraulic fluid. (See Hydraulics section).

LUBRICANT/FLUID

EO Engine oil, 5W30 SAE−SG/SH only.. . . .HYDO TennantTrue premium hydraulic fluid or equivalent.WG Water and ethylene glycol anti-freeze, −34� C (−30� F). . .SPL Special lubricant, Lubriplate EMB grease (Tennant part number 01433−1). . . NOTE: More frequent maintenance intervals may be required in extremely dusty conditions.

MAINTENANCE

48 T20 Gas/LPG 331470 (5−2015)

LUBRICATION


ENGINE OIL

Check the engine oil level daily. Change the oiland oil filter after every 100 hours of operation.

Fill the engine with oil until the oil is between theindicator marks on the dipstick. DO NOT fill pastthe top indicator mark.

The engine oil capacity for GM engines(machines serial number 004999 and below) is3.5 L (3.7 qt) with oil filter.

The engine oil capacity for Mitsubishi engines(machines serial number 005000 and above) is4.7 L (5 qt) with oil filter.

SQUEEGEE CASTER BEARINGS

Lubricate the squeegee caster bearings afterevery 100 hours of operation.

FRONT WHEEL SUPPORT BEARING

Lubricate the front wheel support bearings afterevery 200 hours of operation. Both front wheelsupport grease fittings are located underneath theframe support plate.

STEERING CYLINDER BEARING

Lubricate the steering cylinder after every 200hours of operation. The steering cylinder bearingis located next to the front wheel support.

REAR WHEEL BEARINGS

Inspect the rear wheel bearings for seal damage,and repack and adjust every 400 hours ofoperation. Use Lubriplate EMB grease (Tennantpart number 01433−1).

MAINTENANCE

49T20 Gas/LPG 331470 (9−06)

TORQUE TUBES−CYLINDRICAL BRUSHES

Lubricate the torque tubes after every 200 hoursof operation. The torque tube grease fittings onthe operator side of the machine are locatedbeneath the fuel tank.

On the other side of the machine the torque tubegrease fittings are located beneath the propelpump.

TORQUE TUBES−DISK BRUSHES

Lubricate the three torque tube fittings after every200 hours of operation. The first two fittings arelocated on each side of the machine and the thirdis located above the center brush.

PIVOT SHAFT−DISK BRUSHES

Lubricate the pivot shaft after every 200 hours ofoperation.

MAINTENANCE

50 T20 Gas/LPG 331470 (12−2012)

HYDRAULICS


Check the hydraulic fluid level at operatingtemperature daily. The hydraulic fluid level shouldbe between the two lines on the hydraulic gauge.

ATTENTION! Do not overfill the hydraulic fluidreservoir or operate the machine with a lowlevel of hydraulic fluid in the reservoir.Damage to the machine hydraulic system mayresult.

Drain and refill the hydraulic fluid reservoir withnew TennantTrue premium hydraulic fluid afterevery 2400 hours of operation. Machines have ablue colored drop (left photo) on the hydraulic fluidlabel if originally equipped with TennantTruepremium hydraulic fluid.

WARNING: Burn hazard. Hot surface. DoNOT touch.

TennantTrue Fluid Previous Fluid

Replace the filler cap after every 800 hours ofoperation. Apply a light film of hydraulic fluid ontothe filler cap gasket before installing the cap ontothe reservoir.

Replace the hydraulic fluid filter after every 1200hours of operation or if the hydraulic reservoirgauge is in the yellow/red zone when the reservoirhydraulic fluid is approximately 32�C (90� F).

Replace the hydraulic strainer outlet after every2400 hours of operation.

MAINTENANCE

51T20 Gas/LPG 331470 (12−2012)

HYDRAULIC FLUID

There are three fluids available for differentambient air temperature ranges:

TennantTrue premium hydraulic fluid (Extended Life)

PartNumber

Capacity ISOGradeViscosityIndex (VI)

Ambient AirTemperatureRanges

1057710 3.8 L

(1 gal)

ISO 100

VI 126 orhigher

19� C(65� F) orhigher

1057711 19 L

(5 gal)

1069019 3.8 L (1 gal)

ISO 68

VI 155 orhigher

7 to 43� C

(45 to110� F)1069020 19 L

(5 gal)

1057707 3.8 L

(1 gal)

ISO 32

VI 163 orhigher

16� C(60� F) orlower

1057708 19 L (5 gal)

If using a locally-available hydraulic fluid, be surethe specifications match Tennant hydraulic fluidspecifications. Substitute fluids can causepremature failure of hydraulic components.

ATTENTION! Hydraulic components dependon system hydraulic fluid for internallubrication. Malfunctions, accelerated wear,and damage will result if dirt or othercontaminants enter the hydraulic system.

HYDRAULIC HOSES

Check the hydraulic hoses after every 800 hoursof operation for wear or damage.

FOR SAFETY: When servicing machine, usecardboard to locate leaking hydraulic fluidunder pressure.

High pressure fluid escaping from a very smallhole can almost be invisible, and can causeserious injuries.

00002

Consult a physician immediately if injury resultsfrom escaping hydraulic fluid. Serious infection orreaction can occur if proper medical treatment isnot given immediately.

Contact a mechanic or supervisor if a leak isdiscovered.

MAINTENANCE

52 T20 Gas/LPG 331470 (12−2012)

ENGINE


COOLING SYSTEM

FOR SAFETY: When servicing machine, avoidcontact with hot engine coolant. Do notremove cap from radiator when engine is hot.Allow engine to cool.

Check the coolant level in the reservoir daily. Thecoolant level must be between the indicator markswhen the engine is cold. Refer to the coolantmanufacture for water/coolant mixing instructions.

Flush the radiator and the cooling system afterevery 800 hours of operation.

The cooling system must be completely filled withcoolant to keep the engine from overheating.When filling the cooling system, open the draincocks to bleed the air from the system.

Location of drain cock on LPG machines formachines serial number 001499 and below.

Location of drain cock on gasoline machines formachines serial number 001500 and below.Remove the panel from operators compartment toaccess the drain cock.

MAINTENANCE

53T20 Gas/LPG 331470 (12−2012)

Check the radiator hoses and clamps after every200 hours of operation. Tighten loose clamps.Replace damaged hoses and clamps.

Check the radiator hoses for cracks anddeteriation after every 1000 hours of operation.

Check the radiator core exterior and hydrauliccooler fins for debris after every 100 hours ofoperation. Blow or rinse all dust through the grilleand radiator fins, in the opposite direction ofnormal air flow. Be careful to not bend the coolingfins when cleaning. Clean thoroughly to preventthe fins from becoming encrusted with dust. Toavoid cracking the radiator, allow the radiator andcooler fins to cool before cleaning.

AIR FILTER

Replace the air filter after every 400 hours ofoperation.

FUEL FILTER (LPG)

Replace the LPG fuel filter after every 400 hoursof operation.

Disassemble the fuel lock off valve to access theLPG fuel filter.


MAINTENANCE

54 T20 Gas/LPG 331470 (12−2012)

ELECTRONIC PRESSURE REGULATOR (LPG)(S/N 001500 − 004999)

Remove the sensor and drain the oil from theLPG electronic pressure regulator after every 100hours of operation.


LPG VAPORIZER

Drain oil buildup in the LPG vaporizer after every100 hours of operation.


FUEL FILTER (Gasoline)

Replace the gasoline fuel filter after every 400hours of operation.


Location of fuel filter on machines serial number001499 and below.

Location of fuel filter on machines serial number001500 and above.

MAINTENANCE

55T20 Gas/LPG 331470 (12−2012)

ENGINE BELT

Check the belt tension after every 50 hours ofoperation. Adjust tension as necessary. Properbelt tension is 13 mm (0.50 in) from a force of 4 to5 kg (8 to 10 lb) applied at the mid-point of thelongest span.

WARNING: Moving belt and fan. Keepaway.

PCV SYSTEM

Inspect the PCV system after every 100 hours ofoperation.

SPARK PLUGS − GM ENGINES (S/N 000000 − 004999)

Clean or replace, and set the gap of the sparkplugs after every 400 hours of operation. Theproper spark plug gap is 1 mm (0.042 in).

SPARK PLUGS − MITSUBISHI ENGINES (S/N 005000 − )

Replace the spark plugs after every 1000 hours ofoperation.

MAINTENANCE

56 T20 Gas/LPG 331470 (12−2012)

TIMING BELT − GM ENGINES (S/N 000000 − 004999)

Check the timing belt after every 800 hours ofoperation.

Replace the timing belt after every 2000 hours ofoperation.

CAMSHAFT AND BALANCE SHAFT BELTS −MITSUBISHI ENGINES (S/N 005000 − )

Replace the camshaft and balance shaft beltsafter every 5000 hours of operation.

BATTERY

Clean and tighten the battery connections afterthe first 50 hours of operation and after every 800hours after that. Do not remove the vent plugsfrom the battery or add water to the battery.

FOR SAFETY: When servicing machine, avoidcontact with battery acid.

FUSES AND RELAYS

RELAY PANEL FUSES AND RELAYS

Fuses are one-time protection devices designedto protect the wire harness by stopping the flow ofcurrent in the event of a circuit overload. Relaysswitch the electrical power going to the machineelectrical systems on/off. Remove the relay panelcover to access fuses and relays.

NOTE: Always replace a fuse with a fuse of thesame amperage. Extra 15 Amp fuses areprovided inside the relay panel drawer on therelay panel.

Refer to the diagram below for locations of thefuses and relays on the relay panel. The M10relay for the optional spray nozzle is locatedbehind the battery.

MAINTENANCE

57T20 Gas/LPG 331470 (4−10)

Refer to the table below for the fuses and circuitsprotected.

Fuse Rating Circuit Protected

FU1 15 A Auxiliary Relays/Engine Controls

FU2 15 A Not Used

FU3 15 A Horn

FU4 15 A Not Used

FU5 15 A Scrub Vacuum/Main Brush/Squeegee Down

FU6 15 A Enable/Side Brush

FU7 15 A Solution/Auto Fill/Reverse

FU8 15 A ES/FaST/Detergent/Spray Wand

FU9 15 A Lights

FU10 15 A Unswitched B+ for controller board

FU11 15 A Not Used: Options

FU12 15 A Spray Nozzle Pump

FU13 15 A Not Used

FU14 15 A Not Used

− 20 A ec−H2O (near ignition switch)

Refer to the table below for the relays and circuitscontrolled.

Relay Rating Circuit Controlled

M1 12 VDC, 40 A Auxiliary 1

M2 12 VDC, 40 A Auxiliary 2

M3 12 VDC, 40 A Not Used

M4 12 VDC, 40 A Reverse

M5 12 VDC, 40 A Horn

M6 12 VDC, 40 A Shutdown

M7 12 VDC, 40 A Starter



M10 12 VDC. 40 A Not Used

M11 12 VDC. 40 A FaST Water Pump (located inFaST harness)

M12 12 VDC. 40 A Spray Wand (located in Spraywand harness)

ENGINE HARNESS FUSES AND RELAYS

The engine harness fuses and relays are locatedin the fuse box inside the engine compartment.Refer to the fuse box cover for locations of engineharness fuses and relays.

NOTE: Always replace a fuse with a fuse of thesame amperage.

CIRCUIT BREAKERS (ec−H2O)

Circuit breakers are resettable electrical circuitprotection devices that stop the flow of current inthe event of a circuit overload. Once a circuitbreaker is tripped, allow breaker to cool and thenpress the reset button to manually reset thebreaker.

MAINTENANCE

58 T20 Gas/LPG 331470 (12−2012)

SCRUB BRUSHES AND PADS

The machine can be equipped with either disk orcylindrical scrub brushes, or cleaning pads. Checkscrub brushes or pads daily for wire or stringtangled around the brush or brush drive hub. Alsocheck brushes or pads for damage and wear.

DISK BRUSHES

Replace the brushes when they no longer cleaneffectively.

Cleaning pads must be placed on pad driversbefore they are ready to use. The cleaning pad isheld in place the center disk.

Cleaning pads need to be cleaned immediatelyafter use with soap and water. Do not wash thepads with a pressure washer. Hang pads, or laypads flat to dry.

NOTE: Always replace brushes and pads in sets.Otherwise one brush or pad will be moreaggressive than the other.

REPLACING DISK BRUSHES OR PAD DRIVER

1. Raise the scrub head.


2. Open the right outer brush door.

3. Hold down the release lever and rotate theadjustable disk brush head until it is possibleto access the center brush.

MAINTENANCE

59T20 Gas/LPG 331470 (12−2012)

4. Turn the brushes until the spring handles arevisible.

5. Squeeze the spring handles and let thebrushes drop to the floor.

6. Remove the brushes from underneath thescrub head.

7. Place the new brushes underneath the scrubhead and lift each brush up onto the hub untilthe brush locks onto the hub.

8. Rotate the disk brush head back to the scrubposition until the head locks into place.

9. Close the right outer brush door.

10. Open the left outer brush door and repeat theprocedure for the left brush.

NOTE: The center brush can only be accessedfrom the right side of the machine.

REPLACING DISK PADS


1. Remove the pad driver from the machine.

2. Squeeze the spring clip together to removethe center disk.

3. Flip or replace the scrub pad, center the scrubpad on the pad driver. Then reinstall thecenter disk to secure the pad in place on thepad driver.

4. Reinsert the pad driver into the machine.

MAINTENANCE

60 T20 Gas/LPG 331470 (12−2012)

CHECKING THE DISK SCRUB HEAD STOPBUMPERS

The disk scrub head stop bumpers keep the scrubhead parallel with the floor when in the raisedposition. This protects the brushes whentransporting. Check the lift stop bumpers afterevery 100 hours of operation for wear or damage.



2. Open the right and left outer brush doors.

3. Inspect the scrub head stop bumpers. Adjustthe bumpers if the scrub head is not parallelwith the floor. Replace worn or damagedbumpers.

CYLINDRICAL BRUSHES


Check the main brushes daily for tangled wire orstring, wear, and damage.

Replace the brushes when they no longer cleaneffectively.

Rotate the brushes from front to rear after every50 hours of machine operation for maximumbrush life and best scrubbing performance.

NOTE: Replace brushes in sets of two. Otherwiseone scrub brush may scrub more aggressivelythan the other.

REPLACING OR ROTATING CYLINDRICALBRUSHES

The front brush can be accessed on the left sideof the machine and rear brush can be accessedon the right side of the machine.



2. Open the outer brush doors.

MAINTENANCE

61T20 Gas/LPG 331470 (12−2012)

3. Open the inner brush doors.

4. Remove the brush idler plates.

5. Pull the brushes out from the scrub head.

6. Install the new or rotated brushes by pushingdown on the ends while sliding them onto thedrive motor hubs.

7. If rotating the brushes, always rotate the frontwith the back so that they wear evenly. Theymay be rotated end−for−end as well.

Before After

A B B A

8. Reinstall the brush idler plates.

9. Close the inner and outer brush doors.

10. Check the brush pattern and adjust if neededafter rotating them. Refer to CHECKING ANDADJUSTING THE MAIN BRUSH PATTERN.

11. Check the brush pattern and adjust if neededafter rotating them. Refer to CHECKINGCYLINDRICAL BRUSH PATTERN.

MAINTENANCE

62 T20 Gas/LPG 331470 (12−2012)

CHECKING CYLINDRICAL BRUSH PATTERN

1. Apply chalk, or a similar marking material, toa smooth and level section of the floor.

NOTE: If chalk or other material is not available,allow the brush to spin on the floor for twominutes. A polish mark will remain on the floor.

2. Raise the scrub head, then position thebrushes over the chalked area.

3. Set the parking brake.

4. Press the 1−STEP Scrub button to lower thescrub head. Set the brush pressure to thelowest setting and allow the brushes tooperate for 15 to 20 seconds. Keep the scrubhead in one spot in the chalked area.

5. Raise the scrub head, release the parkingbrake, and drive the machine away from thechalked area.


6. Observe the brush patterns. If the brushpattern is the same width across the entirelength of each brush and both brushes are thesame width, no adjustment is necessary.

10355

7. If the brush patterns are tapered, seeADJUSTING THE CYLINDRICAL BRUSHTAPER section of this manual.

10652

8. The brush patterns should be 50 to 75 mm (2 to 3 in) wide with the brushes in thelowered position and both patterns should bethe same width. If the width of the brushes isnot the same, see ADJUSTING THECYLINDRICAL BRUSH WIDTH section of thismanual.

10653

MAINTENANCE

63T20 Gas/LPG 331470 (12−2012)

ADJUSTING THE CYLINDRICAL BRUSH TAPER

1. Loosen the four mounting bolts on the brushdrive housing.

2. Move the brush drive housing up to decreasethe pattern width on that side of the scrubhead or down to increase the pattern width onthat side of the scrub head.

3. Tighten the mounting bolts.

4. Recheck the pattern. Readjust if necessary.

ADJUSTING THE CYLINDRICAL BRUSHWIDTH

1. Adjust the length of the drag links on bothsides of the scrub head. Lengthen the draglinks to increase the rear brush pattern width.Shorten the drag links to increase the frontbrush pattern. Always adjust the nut on eachdrag link an equal number of turns.

NOTE: Two full turns of the drag link adjustmentbolt will change the brush pattern approximately25 mm (1 in).

2. Recheck the pattern. Readjust if necessary.

MAINTENANCE

64 T20 Gas/LPG 331470 (10−2015)

SIDE BRUSH (OPTION)


Check the side brush daily for wear or damage.Remove any tangled string or wire from the sidebrush or side brush drive hub.

REPLACING THE SIDE BRUSH

Replace the brush when it no longer cleanseffectively or when the bristles are worn down tothe yellow indicators.

1. If necessary, raise the side brush.

2. Turn the brush until the spring handles arevisible through the access hole in the sidebrush assembly.

3. Squeeze the spring handles and let the sidebrush drop to the floor.

4. Remove the side brush from underneath theside brush assembly.

5. Set the brush spring open on the new brushto make installation easier.

6. Place the new side brush underneath the sidebrush assembly and lift the side brush up ontothe side brush hub until the brush locks ontothe hub.

MAINTENANCE

65T20 Gas/LPG 331470 (12−2012)

FaST SYSTEM

REPLACING THE FaST−PAK CARTON


1. Open the side access door.

2. Slide the seat completely forward.

3. Squeeze the button on the FaST supply hoseconnector, then pull the empty FaST−PAKcarton out from the compartment and discard.

4. Remove the perforated knock outs from thenew FaST−PAK carton. Do Not remove thebag from the carton. Pull out the hoseconnector located on the bottom of the bagand remove the hose cap from the connector.

NOTE: The FaST−PAK Floor CleaningConcentrate is specially designed for use with theFaST system scrubbing application. NEVER usea substitute. Other cleaning solutions may causeFaST system failure.

5. Slide the FaST−PAK carton into theFaST−PAK bracket.

6. Connect the FaST supply hose to theFaST−PAK hose connector.

7. Scrub with the FaST system for a fewminutes to allow the detergent to reachmaximum foaming.

MAINTENANCE

66 T20 Gas/LPG 331470 (12−2012)

CLEANING THE FaST SUPPLY HOSECONNECTOR

Soak the connector in warm water if detergentbuildup is visible. When a FaST−PAK carton is notinstalled, store the supply hose connector on thestoring plug to prevent the hose from clogging.

CLEANING THE FaST SYSTEM FILTERSCREEN

The FaST system filter screen filters water fromthe solution tank as the water flows into the FaSTsystem.

Remove the filter screen bowl and clean the filterscreen after every 50 hours of operation. Emptythe solution tank before removing the filter.

CLEANING THE FaST SYSTEM AIR PUMPFILTER (S/N 000000 − 001742)

Remove and clean the air filter with compressedair after every 200 hours of FaST scrubbing.

REPLACING THE FaST SYSTEM FILTERS (S/N 001743− )

Replace the FaST system filters after every 1000hours of operation. Empty the solution tank beforereplacing the filters.

MAINTENANCE

67T20 Gas/LPG 331470 (12−2012)

ec−H2O MODULE FLUSH PROCEDURE

This procedure is only required when an alarmsounds and the ec−H2O system indicator lightbegins to blink red.

FOR SAFETY: Before leaving or servicingmachine, stop on level surface, set parkingbrake, turn off machine.

1. Remove both flush hoses from the storagebag located behind the operator seat.

2. Lock the operator seat cover open.

3. Disconnect the ec−H2O system intake hosefrom the solution supply hose and connect theintake flush hose (gray connector) to theec−H2O system intake hose.

4. Disconnect the ec−H2O system outlet hosefrom the hose to the scrub head and connectthe outlet flush hose (black connector) to theec−H2O system outlet hose.

5. Place the ec−H2O system intake hose into acontainer containing 5 gallons (19 liters) ofwhite or rice vinegar. Place the outlet hoseinto an empty bucket.

6. Turn the key to the on position without startingthe engine.

7. Press and release the ec−H2O module flushswitch to start the flush cycle.

NOTE: The module will automatically shut offwhen the flush cycle is complete (approx. 7minutes). The module must run the full 7 minutecycle in order to reset the system indicator lightand alarm.

MAINTENANCE

68 T20 Gas/LPG 331470 (4−10)

8. After the 7 minute flush cycle, remove thesiphon hose from the container of vinegar andplace the siphon hose into a container of coolclean water. Press the flush switch again torinse out any remaining vinegar from themodule. After 1−2 minutes, press the flushswitch to turn off the module.

9. Disconnect the flush hoses from the ec−H2Osystem intake hose and outlet hose andreturn the flush hoses to the storage bag.

10. Reconnect ec−H2O intake and outlet hoses. Ifthe ec−H2O system indicator light continuesto flash, repeat the flush procedure. If theproblem persists, contact an AuthorizedService Center.

11. Insert the outlet and intake hoses between theec−H2O assembly and the bracket.

NOTE: The outlet and intake hoses must be downbetween the ec−H2O assembly and the bracket sothey are not pinched or damaged when the operatorseat cover is closed.

12. Close the operator seat cover.

CLEANING THE ec−H2O FILTER SCREEN

Remove and clean the ec−H2O filter screen afterevery 50 hours of operation.

MAINTENANCE

69T20 Gas/LPG 331470 (12−2012)

SQUEEGEE BLADES

Check the squeegee blades for damage and weardaily. When the blades become worn, rotate theblades end−for−end or top−to−bottom to a newwiping edge. Replace blades when all edges areworn.

Check the deflection of the squeegee blades dailyor when scrubbing a different type of surface.Check the leveling of the rear squeegee every100 hours of operation.

REPLACING (OR ROTATING) THE REARSQUEEGEE BLADES

1. Lower the scrub head.


2. Disconnect the vacuum hose from the rearsqueegee assembly.

3. Remove both mounting knobs from the rearsqueegee assembly.

4. Turn on the machine, raise the scrub head,and turn off the machine.

5. Remove the rear squeegee assembly fromthe machine.

6. Loosen the rear retaining band tension latchand open the retaining band.

7. Remove the rear squeegee.

MAINTENANCE

70 T20 Gas/LPG 331470 (12−2012)

8. Install the new rear squeegee blade or rotatethe existing blade to the new edge. Be sure allthe holes in the squeegee blade are hookedonto the tabs.

9. Reinstall the rear retaining band aligning thetabs with the holes.

10. Tighten the rear retaining band tension latch.

11. Loosen the front retaining band tension latchand open the retaining band.

12. Remove the front squeegee.

13. Install the new front squeegee blade or rotatethe existing blade to the new edge. Be surethe holes in the squeegee blade are hookedonto the tabs.

MAINTENANCE

71T20 Gas/LPG 331470 (12−2012)

14. Reinstall the front retaining band aligning thetabs with the notches.

15. Tighten the front retaining band tension latch.

16. Reinstall the rear squeegee assembly ontothe machine.

17. Check and adjust the rear squeegee ifnecessary. Refer to ADJUSTING THE REARSQUEEGEE BLADE DEFLECTION andLEVELING THE REAR SQUEEGEE sectionsof this manual.

REPLACING OR ROTATING THE SIDESQUEEGEE BLADES

1. If necessary, raise the scrub head.


2. Open the outer brush doors.

3. Unhook the latch on the side squeegeeretaining band from the side squeegeeassembly.

4. Remove the retaining band from the sidesqueegee assembly.

MAINTENANCE

72 T20 Gas/LPG 331470 (12−2012)

5. Remove the side squeegee blade. If the outeredge of the squeegee blade is not worn,rotate the squeegee blade with the blade fromthe other side of the machine. Discard thesqueegee blade if both edges are worn.

6. Install the new or rotated squeegee blades.

7. Reattach the side squeegee retaining band tothe side squeegee assembly.

8. Hook the latch on the side squeegee retainingband.

9. Close the outer brush door.

MAINTENANCE

73T20 Gas/LPG 331470 (12−2012)

REPLACING THE SIDE BRUSH SQUEEGEEBLADE (S/N 000000−002115) (OPTION)

Check the side brush squeegee blade for damageand wear daily. Replace the blade if the leadingedge is torn or worn half-way through thethickness of the blade.

1. If necessary, raise the scrub head.

FOR SAFETY: Before leaving or servicingmachine, stop on level surface, set parkingbrake, turn off machine and remove key.

2. Pull the pin from the squeegee bumper andopen the squeegee bumper.

3. Remove the clevis pin and squeegee retainer.

4. Pull the squeegee out from the side brushassembly.

5. Slide the new squeegee into the side brushassembly.

6. Reinstall the squeegee retainer and clevis pin.

7. Close the squeegee bumper and reinsert thepin.

MAINTENANCE

74 T20 Gas/LPG 331470 (12−2012)

REPLACING OR ADJUSTING THE SIDEBRUSH SQUEEGEE BLADE (S/N 002116− )(OPTION)


Check the side brush squeegee blade for damageand wear daily. Replace the blade if the leadingedge is torn or worn half-way through thethickness of the blade.


2. Pull the pins and remove the squeegeebumper.

3. Open the retaining band tension latch.

4. Remove the squeegees, spacer, and retainerfrom the squeegee bumper.

NOTE: The side brush squeegee blades havedifferent holes for changing height adjustment.

5. Reinstall the squeegees, spacer, and retainerto the squeegee bumper by aligning theappropriate holes to the pins on the bumper.

6. Reinstall the retaining band tension latch.

7. Reinstall the squeegee bumper and reinsertthe pins.

MAINTENANCE

75T20 Gas/LPG 331470 (12−2012)

LEVELING THE REAR SQUEEGEE

Leveling the squeegee assures the entire lengthof the squeegee blade is in even contact with thesurface being scrubbed. Perform this adjustmenton an even and level floor.

1. Lower the squeegee and drive the machineforward a few meters (feet).


2. Look at the deflection of the squeegee overthe full length of the squeegee blade.

3. If the deflection is not the same over the fulllength of the blade, turn the squeegeelevelling nut to make adjustments.

DO NOT disconnect the suction hose fromthe squeegee frame when leveling squeegee.

4. Turn the squeegee leveling nutcounter-clockwise to decrease the deflectionat the ends of the squeegee blade.

Turn the squeegee leveling nut clockwise toincrease the deflection at the ends of thesqueegee blade.

5. Drive the machine forward with the squeegeedown to recheck the squeegee bladedeflection if adjustments were made.

6. Readjust the squeegee blade deflection ifnecessary.

MAINTENANCE

76 T20 Gas/LPG 331470 (12−2012)

ADJUSTING THE REAR SQUEEGEE BLADEDEFLECTION

Deflection is the amount of curl the overallsqueegee blade has when the machine movesforward. The best deflection is when thesqueegee wipes the floor dry with a minimalamount of deflection.

NOTE: Make sure the squeegee is level beforeadjusting the deflection. See LEVELING THEREAR SQUEEGEE.

1. Lower the squeegee and drive the machineforward a few meters (feet).


2. Look at the amount of deflection or “curl” ofthe squeegee blade. The correct amount ofdeflection is 12 mm (0.50 in) for scrubbingsmooth floors and 15 mm (0.62 in) for roughfloors.

12 mm(0.50 in)

3. To adjust the overall squeegee bladedeflection, turn the adjustment knobscounterclockwise to increase deflection orclockwise to decrease deflection.

4. Drive the machine forward again to recheckthe squeegee blade deflection afteradjustments are made.

5. Readjust the squeegee blade deflection ifnecessary.

MAINTENANCE

77T20 Gas/LPG 331470 (12−2012)

SKIRTS AND SEALS


SCRUB HEAD SKIRT

Check the skirt for damage and wear after every100 hours of operation.

The skirts should be between 0 to 6 mm(0 to 0.25 in) from the floor when the scrub headis down.

RECOVERY TANK SEAL

Check the recovery tank cover seal for damageand wear daily.

SOLUTION TANK SEALS

Check each solution tank cover seal for damageand wear daily.

MAINTENANCE

78 T20 Gas/LPG 331470 (12−2012)

BRAKES AND TIRES

BRAKES

The mechanical brakes are located on the rearwheels. The brakes are operated by the footbrake pedal and connecting cables.

Check the brake adjustment after every 200 hoursof operation.

To check the brake adjustment, measure thedistance from the stationary brake pedal to thepoint where there is resistance in the pedalmovement. The distance must be between 6 mm(0.25 in) and 19 mm (0.75 in). Adjust the brakes ifrequired.

TIRES

Check tires for damage and wear after every 100hours of operation.

FRONT WHEEL

Torque the front wheel nuts twice in the patternshown to 122 to 149 Nm (90 to 110 ft lb) after thefirst 50 hours of operation, and after every 800hours there after.

2

3

4

1

5

PROPELLING MOTOR

Torque the shaft nut to 508 Nm (375 ft lb)lubricated, 644 Nm (475 ft lb) dry, after every 800hours of operation.

MAINTENANCE

79T20 Gas/LPG 331470 (12−2012)

PUSHING, TOWING, AND TRANSPORTINGTHE MACHINE

PUSHING OR TOWING THE MACHINE

If the machine becomes disabled, it can bepushed from the front or rear, but only towed fromthe front.

The propelling pump has a bypass valve toprevent damage to the hydraulic system when themachine is being pushed or towed. This valveallows a disabled machine to be moved for a veryshort distance and at a speed to not exceed 1.6kp/h (1 mph). The machine is NOT intended to bepushed or towed a long distance or at a highspeed.

ATTENTION! Do not push or tow machine fora long distance or damage may occur to thepropelling system.

Turn the bypass valve located on the bottom ofthe propelling pump 90� (either direction) from thenormal position before pushing or towing themachine. Return the bypass valve back to thenormal position when through pushing or towingthe machine. Do Not use the bypass valve duringnormal machine operation.

TRANSPORTING THE MACHINE

1. Raise the squeegee, scrub head, andbrushes.

FOR SAFETY: When loading machine ontotruck or trailer, drain tanks before loadingmachine.

2. Position the rear of the machine at the loadingedge of the truck or trailer.

3. If the loading surface is not horizontal or ishigher than 380 mm (15 in) from the ground,use a winch to load machine.

If the loading surface is horizontal and 380mm (15 in) or less from the ground, themachine may be driven onto the truck ortrailer.

FOR SAFETY: When loading machine ontotruck or trailer, use winch. Do not drive themachine onto the truck or trailer unless theloading surface is horizontal AND is 380 mm(15 in) or less from the ground.

4. To winch the machine onto the truck or trailer,attach the winching chains to the holes in therear jacking brackets behind the rear tires.

MAINTENANCE

80 T20 Gas/LPG 331470 (12−2012)

5. Position the machine as close to the front ofthe trailer or truck as possible.

6. Set the parking brake and place a blockbehind each wheel to prevent the machinefrom rolling.


FOR SAFETY: When loading/unloadingmachine onto/off truck or trailer, lower scrubhead and squeegee before tying downmachine.

8. Connect the tie−down straps to the holes inthe right and left lower corners in front of themachine and the holes in the rear jackingbrackets behind the rear tires.

9. Route the tie−downs to the opposite ends ofthe machine and hook them to the bracketson the floor of the trailer or truck. Tighten thetie−down straps.

NOTE: It may be necessary to install tie-downbrackets to the floor of the trailer or truck.

10. If the loading surface is not horizontal or ishigher than 380 mm (15 in) from the ground,use a winch to unload machine.

If the loading surface is horizontal AND is 380mm (15 in) or less from the ground, themachine may be driven off the truck or trailer.

FOR SAFETY: When unloading machine offtruck or trailer, use winch. Do not drive themachine off the truck or trailer unless theloading surface is horizontal AND 380 mm (15 in) or less from the ground.

MAINTENANCE

81T20 Gas/LPG 331470 (12−2012)

MACHINE JACKING

Empty the debris tray, recovery tank, and solutiontank before jacking up the machine. Jack up themachine at the designated locations. Use a hoistor jack capable of supporting the weight of themachine. Use jackstands to support the machine.Always stop the machine on a flat, level surfaceand block the tires before jacking up the machine.

Rear jacking locations are located directly behindthe rear tires on each side of the machine.

Front jacking locations are located on the framedirectly in front of the front tire.


FOR SAFETY: When servicing machine, blockmachine tires before jacking machine up. Usea hoist or jack that will support the weight ofthe machine. Jack machine up at designatedlocations only. Support machine with jackstands.

STORAGE INFORMATION

The following steps should be taken prior tostoring the machine for extended periods.

1. Drain and clean the solution and recoverytanks. Open the recovery tank and solutiontank covers to allow the air to circulate.

2. Park the machine in a cool, dry area. Do notexpose the machine to rain. Store indoors.

3. Remove the battery, or charge battery everythree months.

MAINTENANCE

82 T20 Gas/LPG 331470 (4−10)

FREEZE PROTECTION (MACHINES WITHOUTec−H2O SYSTEM)


1. Be sure the solution tank and recovery tankare empty.

2. Pour 3.8 L (1 gal) of Propylene Glycol Based /Recreational Vehicle (RV) Antifreeze into thesolution tank.


4. Press the 1−STEP Scrub button.

5. Repeatedly press the Solution increase button(+) until the solution flow is at the highestsetting.

6. Press the directional pedal to circulate the RVantifreeze completely through the system.

7. Press the 1−STEP Scrub button to turn off thesystem.

8. Machines equipped with the optionalspray nozzle only: Turn on the pump untilRV antifreeze solution sprays from the nozzle.

9. Turn the key to the off position.

10. The remaining RV antifreeze does not need tobe drained from the solution tank.

NOTE: Storing or transporting machines equippedwith the ES or the FaST system in freezingtemperatures requires special procedures.Consult a TENNANT representative for moreinformation.

FREEZE PROTECTION (MACHINES WITHec−H2O SYSTEM)


1. Empty the solution tank and recovery tank.

2. Remove the intake flush hose and from thestorage bag behind the operator seat.

3. Disconnect the ec−H2O system intake hosefrom the solution supply hose and connect theintake flush hose (gray connector) to theec−H2O system intake hose.

4. Pull the drain tube from the between theec−H2O unit and the operator compartment,remove the cap from the tube, and place theend of the tube into an empty container. Setthe cap aside.

MAINTENANCE

83T20 Gas/LPG 331470 (12−2012)


6. Press and release the ec−H2O module flushswitch. Allow the system to drain water intothe container for 2 minutes.

7. Press the ec−H2O module flush switch toshut off the system.

8. Disconnect the ec−H2O system outlet hosefrom the hose to the scrub head.

9. Blow pressurized air (less than 344 kPa (50psi)) into the ec−H2O system outlet hose.Continue blowing compressed air into theoutlet hose until water no longer drains fromthe drain tube

10. Reinstall the cap onto the drain tube andinsert the tube back between the ec−H2Omodule and the operator compartment.

11. Reconnect the ec−H2O system intake hose tothe solution supply hose and the ec−H2Osystem outlet hose to the hose to the scrubhead.

12. Insert the intake and outlet hoses downbetween the ec−H2O assembly and thebracket.

13. Return the intake flush hose to the storagebag behind the operator seat.

MAINTENANCE

84 T20 Gas/LPG 331470 (4−10)

PRIMING THE ec−H2O SYSTEM

Prime the ec−H2O system if the machine hasbeen stored for a long period without water in thesolution tank / ec−H2O system.


1. Fill the solution tank with clean cool water.See FILLING THE SOLUTION TANK sectionof this manual.

2. Remove the outlet flush hose (blackconnector) from the storage bag behind theoperator seat.

3. Disconnect the ec−H2O system outlet hosefrom the hose to the scrub head and connectthe outlet flush hose to the ec−H2O systemoutlet hose.

4. Place the ec−H2O system outlet hose into anempty container.


6. Press and release the ec−H2O module flushswitch. Allow the system to drain water intothe container for 2 minutes.

7. Press the ec−H2O module flush switch toshut off the system.

8. Disconnect the outlet flush hose from theec−H2O system outlet hose and return theflush hose to the storage bag.

9. Reconnect the ec−H2O system outlet hose tothe hose to the scrub head.

SPECIFICATIONS

85T20 Gas/LPG 331470 (5−2016)

SPECIFICATIONS

GENERAL MACHINE DIMENSIONS/CAPACITIES

Item Dimension/capacityLength 2410 mm (95 in)Height 1470 mm (58 in)Height (with overhead guard) 2120 mm (83.5 in)Width/frame (roller to roller) 1270 mm (50 in)Width (rear squeegee) 1300 mm (51 in)Width (with side brush) 1470 mm (58 in)Cleaning path width (main brush length)−Cylindrical Brush 1020 mm (40 in)Cleaning path width (with scrubbing side brush)−Cylindrical Brush 1370 mm (54 in)Cleaning path width (with sweeping side brush)−Cylindrical Brush 1420 mm (56 in)Main brush diameter (2)−Cylindrical Brush 300 mm (12 in)Cleaning path width (main brush length)−Disk Brush 1070 mm (42 in)Main brush diameter (3)−Disk Brush 360 mm (14 in)Side brush diameter−scrubbing 410 mm (16 in)Side brush diameter−sweeping (cylindrical only) 530 mm (21 in)Solution tank capacity 303 L (80 gallons)Recovery tank capacity 360 L (95 gallons)Debris tray volume capacity 31 L (1.1 ft3)Debris tray weight capacity 50 kg (110 lbs)Weight − empty 1497 Kg (3300 lbs)GVWR 2223 Kg (4900 lbs)Transport ground clearance 80 mm (3 in)Protection Grade IPX3

Values determined as per IEC 60335−2−72 MeasureSound pressure level LpA 84 dB(A)Sound uncertainty KpA 3.0 dB(A)Sound power level LWA + Uncertainty KWA 106 dB(A)Vibration − Hand−arm < 2.5 m/s�Vibration − Whole body < 0.5 m/s�

GENERAL MACHINE PERFORMANCE

Item MeasureMinimum aisle turn 2790 mm (110 in)Travel speed forward (maximum) 12.9 Km/h (8 mph)Travel speed reverse (maximum) 4.8 Km/h (3 mph)Maximum ramp incline for loading − Empty tanks 18%Maximum ramp incline for scrubbing 10%Maximum ramp incline for transporting (GVWR) 14%Maximum ambient temperature for machine operation 43� C (110� F)Minimum temperature for operating machine scrubbing functions 0� C (32� F)

HYDRAULIC SYSTEM

System Capacity ISO Grade Viscosity Index Ambient Air Temperature Ranges

Hydraulic reservoir 38 L (10 gal) ISO 100 VI 126 or higher 19� C (65� F) or higher

Hydraulic total 45 L (12 gal) ISO 68 VI 155 or higher 7 to 43� C (45 to 110� F)

ISO 32 VI 163 or higher 16� C (60� F) or lower

SPECIFICATIONS

86 T20 Gas/LPG 331470 (5−2016)

POWER TYPE

Engine Type Ignition Cycle Aspiration Cylinders Bore StrokeGM 1.6 (S/N 000000 −004999)

Piston Distributorless-type spark

4 Natural 4 79 mm(3.11 in)

81.5 mm(3.21 in)

Displacement Tennant machine governed netpower

Engine mfgun−governed netpower

1600 cc (98 cu in) 23.2 kw (32 hp) @ 2400 rpm 39.5 kw (53 hp) @ 4000 rpm

Fuel Cooling system Electrical systemGasoline, 87 octaneminimum, unleadedFuel tank: 42 L (11.2 gal)

Water/ethylene glycol antifreeze

12 V nominal

LPG, Fuel tank: 15 kg (33 lb)

Total: 7.5 L (2 gal) 75 A alternatorRadiator: 3.8 L (1 gal)

Idle speed, no load (Fast) governed speed, underload

Firing order

950 + 50 rpm (machines serial number001999 and below)

1350 + 50 rpm(machines serial number002000 and above)

2400 + 50 rpm 1−3−4−2

Spark plug gap Valve clearance, cold Engine lubricating oilwith filter

1 mm (0.035 in) No AdjustmentOHC Engine

3.5 L (3.7 qt) 5W30SAE−SG/SH

Engine Type Ignition Cycle Aspiration Cylinders Bore StrokeMitsubishi 2.0(S/N 005000 − )

Piston Coil @ Plug 4 Natural 4 85 mm(3.35 in)

88 mm(3.46 in)

Displacement Tennant machine governed netpower

Engine mfgun−governed netpower

1997 cc (122 cu in) 37.3 kw (50 hp) @ 2300 rpm 44.7 kw (60 hp) @ 3000 rpm

Fuel Cooling system Electrical systemGasoline, 87 octaneminimum, unleadedFuel tank: 42 L (11.2 gal)

Water/ethylene glycol antifreeze

12 V nominal

LPG, Fuel tank: 15 kg (33 lb)

Total: 7.5 L (2 gal) 75 A alternatorRadiator: 3.8 L (1 gal)

Idle speed, no load (Fast) governed speed, underload

Firing order

1350 + 50 rpm 2300 + 50 rpm 1−3−4−2Spark plug gap Valve clearance, cold Engine lubricating oil

with filter

1.1 mm (0.035 in) No AdjustmentOHC Engine

4.7 L (5 qt) 5W30SAE−SG/SH

SPECIFICATIONS

87T20 Gas/LPG 331470 (12−2012)

BRAKING SYSTEM

Type Operation

Service brakes Mechanical drum brakes (2), one per rear wheel, cable actuated

Parking brake Utilize service brakes, cable actuated

TIRES

Location Type Size

Front (1) Solid 140 mm x 460 mm (5.5 in x 18 in)

Rear (2) Solid 90 mm x 410 mm (3.5 in x 16 in)

STEERING

Type Power source

Front wheel, hydraulic cylinder and rotary valve controlled Hydraulic accessory pump

SPECIFICATIONS

88 T20 Gas/LPG 331470 (4−10)

FaST SYSTEM

Item Measure

Solution pump (S/N 001743− ) 12 Volt DC, 11A, 0.7 GPM & 1.4 GPM flow, (2 spees), 75 psi high−pressure shutdown

Solution pump (S/N 000000−001742) 12 Volt DC, 11A, 11.6 LPM (3.0 GPM) open flow, 45 psi bypass setting

Low solution flow rate 2.7 LPM (0.7 GPM)

High solution flow rate 5.4 LPM (1.4 GPM)

Low concentrate flow rate 2.6 CC/Minute (0.085 Liquid Ounces/Minute)

High concentrate flow rate 5.2 CC/Minute (0.17 Liquid Ounces/Minute)

Detergent pump (S/N 000000−001742) 12 Volt DC

Air pump (S/N 000000−001742) 12 Volt DC, 0.6 Maximum Amp draw

Air pump flow rate (S/N 000000−001742) 8.7 LPM (0.3 CFM) open flow

ec−H2O SYSTEM

Item Measure

Solution pump 12 Volt DC, 11A, 0.7 GPM & 1.4 GPM flow, (2 speeds), 75 psi high−pressure shutdown

Solution flow rate 2.65 LPM (0.7 GPM) − Low

5.30 LPM (1.4 GPM) − High

SPECIFICATIONS

89T20 Gas/LPG 331470 (9−06)

MACHINE DIMENSIONS

Frame(roller to roller) 1270 mm (50 in)

1470 mm(58 in)

2410 mm(95 in)

RearSqueegee1300 mm

(51 in)

Width(with side brush)1470 mm (58 in)

INDEX

90 T20 Gas/LPG 331470 (5−2015)

Numbers

1-STEP Scrub button, 12, 16, 24, 25, 26, 27, 28

A

Adjust operator seat, 14

Adjust steering column, 14

Adjusting the Cylindrical Brush Taper, 63

Adjusting the Cylindrical Brush Width, 63

Adjusting the Rear Squeegee Blade Deflection,76

Adjusting the recovery tank drain plug, 33

Air Filter, 53

Alarms, 36Fault Indicators, 36

B

Battery, 56

Belts, Camshaft and Balance, 56

Brake pedal, 15

Brakes, 78

Brakes and Tires, 78Brakes, 78Front Wheel, 78Tires, 78

Braking System, System specifications, 87

Brush and Pad Information, 17

Brush Information, 17

Buttons1−STEP Scrub button, 26Brush Pressure decrease button (−), 24Brush Pressure increase button (+), 24ec−H20 button, 24Engine Speed Button, 12ES (Extended Scrub) button, 24FaST button, 24Scrub vacuum fan/squeegee button, 27Side Brush button (Option), 12Solution decrease button (−), 25Solution increase button (+), 25Supervisor Control Buttons, 13

Buttons, Controls, and Instruments, 9, 12

Bypass valve, 79

C

Camshaft and Balance Shaft Belts, 56

Capacities, 85

Changing the LPG Tank, 20

Charging System Indicator, 11

Check Engine Indicator, 11

Checking the Cylindrical Brush Pattern, 62

Checking the Disk Scrub Head Stop Bumpers,60

Circuit Breakers, ec-H2O, 57

Cleaning the ec-H20 fitler screen, 68

Cleaning the FaST Supply Hose Connector, 66

Cleaning the FaST System Air Pump Filter, 66

Cleaning the FaST System Check Valves, 66

Cleaning the FaST System Filter Screen, 66

Conditions / Warnings, 37

Contents, 1

Controls and Instruments, 8, 9Touch Panel, 9

Cooling System, 52

Cylinderical brushes, 60

Cylindrical Brush, Replacing or Rotating, 60

Cylindrical BrushesAdjusting the Taper, 63Adjusting the Width, 63Checking the Main Brush Pattern, 62Replacing or Rotating, 60

Cylindrical Brushes, Adjusting the Taper, 63

Cylindrical Brushes, Adjusting the Width, 63

Cylindrical Brushes, Checking the Pattern, 62

INDEX

91T20 Gas/LPG 331470 (5−2015)

D

Dimensions, 85

Directional pedal, 15

Disk Brush, Replacing, 58

Disk brushes, 58 - 63

Disk Pads, Replace, 59

Disk Scrub Brushes, Replacing, 58

Disk Scrub Head Stop Bumpers, Checking, 60

Double Scrubbing, 27

Draining and Cleaning the Recovery Tank, 31Draining the Recovery Tank with the Drain

Hose, 31Draining the Recovery Tank with the Drain Plug,

32

Draining and Cleaning the Solution Tank, 34

Draining the Recovery Tank with the Drain Hose,31

Draining the Recovery Tank with the Drain Plug,32

E

ec-H20 module flush switch, 67

ec-H20 Scrubbing System, Indicator LightCodes, 26

ec-H20 Scrubbing System Indicator LightCodes , 26

ec-H2O Module Flush Procedure, 67

ec-H2O system indicator light, 26

Electronic Pressure Regulator, 54

Emptying and Cleaning the Debris Tray(Cylindrical scrub heads only), 29

Engine, 52Air Filter, 53Camshaft and Balance Shaft Belts, 56Cooling System, 52Electronic Pressure Regulator, 54Engine Belt, 55Fuel Filter, 53, 54LPG Vaporizer, 54PCV System, 55Spark Plugs, 55Specifications, 86Timing Belt, 56

Engine Belt, 55

Engine Harness Fuses and Relays, 57

Engine Oil, 48

Engine Oil Pressure Indicator, 11

Engine Speed Button, 12

F

FaST System, 65Cleaning the FaST Supply Hose Connector, 66Cleaning the FaST System Air Pump Filter, 66Cleaning the FaST System Check Valves, 66Cleaning the FaST System Filter Screen, 66Replacing the FaST−PAK Carton, 65

Fault Indicators, 36

Filling the Solution Tank, 22Conventional Scrubbing Mode, 22ec−H20 scrubbing (ec−H20 Mode), 22ES (Extended Scrub) Mode − Manually Filling

Tank, 23ES (Extended Scrub) Mode with Auto−Fill, 23Foam scrubbing (FaST Mode), 22

FiltersEngine Air Filter, 53Gasoline Fuel Filter, 54Hydraulic Fluid Filter, 50LPG Fuel Filter, 53

Freeze Protection (Machines with ec-H20system), 82

Freeze Protection (Machines without ec-H20system), 82

Front Wheel Support Bearing, 48

Front Wheel, Torque, 78

Fuel FilterGasoline, 54LPG, 53

Fuel Indicator, 12

Fuses and Relays, 56Engine Harness Fuses and Relays, 57Relay Panel Fuses and Relays, 56

Fuses, Relays, and Circuit Breakers, Circuitbreakers (ec-H2O), 57

INDEX

92 T20 Gas/LPG 331470 (5−2015)

H

Hazard Light Switch (Option), 13

Headlights, 13

Hour Meter, 13

How the Machine Works, 16

Hydraulic Fluid, 51

Hydraulic Hoses, 51

Hydraulic System, System specifications, 86

Hydraulics, 50Drain and refill hydraulic fluid reservoir, 50Hydraulic Fluid, 51Hydraulic Hoses, 51Replace the filler cap, 50Replace the hydraulic fluid filter, 50Replace the hydraulic strainer outlet, 50

I

Incline, Rated, 18

Indicator Light Codes, ec-H20 ScrubbingSystem, 26

Indicator light, ec-H2O system, 26

IndicatorsCharging System Indicator, 11Check Engine Indicator, 11Conditions / Warnings, 37Engine Oil Pressure Indicator, 11Fault Indicators, 36Fuel Indicator, 12Hour Meter, 13

L

Leveling the Rear Squeegee, 75

LightsHazard Light Switch (Option), 13Headlights, 13Operating, 13

LPG Vaporizer, 54

Lubrication, 48Engine Oil, 48Front Wheel Support Bearing, 48Pivot Shaft (Disk Brushes), 49Rear wheel bearings, 48Squeegee Caster Bearings, 48Steering Cylinder Bearing, 48Torque Tubes (Cylindrical Brushes), 49Torque Tubes (Disk Brushes), 49

M

Machine components, 7

Machine Dimensions, 89

Machine Jacking, 81

Machine Operation, Pre-Operation Checklist, 19

Machine PerformanceAisle Turnaround Width, 85Climb and Descent Angles, 85Travel Speed (Maximum), 85

Machine Specifications, 85 - 88

Machine Troubleshooting, 42

Maintenance, 44 - 68Cylinderical brushes, 60 − 65Disk brushes, 58 − 63

Maintenance Chart, 45

O

Operating Lights, 13

Operating temperature, 18

Operation, 7 - 31

Operation of controls, 11

Operator seat, 14

Options, 38Hazard Light, 13Power Wand (Option), 40Side Brush, 12Spray Nozzle (Option), 38Squeegee protectors, 15Vacuum Wand (Option), 39

INDEX

93T20 Gas/LPG 331470 (5−2015)

P

Pad Driver, Replacing, 58

Pad Information, 17

Parking brake pedal, 15

PCV System, 55

PedalsBrake pedal, 15Directional pedal, 15Parking brake pedal, 15

Pivot Shaft (Disk Brushes), 49

Power Wand (Option), 40

Pre-Operation Checklist, 19

Priming the ec-H20 system, 84

Propelling Motor, 78Torque Shaft Nut, 78

Pushing or Towing the Machine, 79

Pushing, Towing, and Transporting the Machine,79

Pushing or Towing the Machine, 79Transporting the Machine, 79

R

Radiator, 53Check hoses and clamps, 53Clean core exterior, 53

Rated incline, 18

Rear SqueegeeAdjusting the Rear Squeegee Blade Deflection,

76Leveling the Rear Squeegee, 75

Rear Squeegee Blade, Replacing (or Rotating)the Rear Squeegee Blade, 69

Rear Squeegee, Replacing (or Rotating), 69

Rear Wheel bearings, 48

Recovery Tank Seal, 77

Relay Panel Fuses and Relays, 56

Replacing (or Rotating) the Rear SqueegeeBlades, 69

Replacing Cylindrical Scrub Brushes, 60

Replacing or Rotating Cylindrical Brushes, 60

Replacing or Rotating the Side SqueegeeBlades, 71

Replacing the FaST-PAK Carton, 65

Replacing the Side Brush (Option), 64

Replacing the Side Brush Squeegee Blade (S/N002116- ) (Option), 74

Replacing the Side Brush Squeegee Blade (S/N000000-002115) (Option), 73

Rotating Cylindrical Scrub Brushes, 60

S

SafetyInstructions, 3 − 5Labels, 5 − 7

Scrub brushes, Cylinderical brushes, 60

Scrub Brushes and Pads, 58Disk brushes, 58Replacing Disk Brushes or Pad Driver, 58Replacing Scrub Pads, 59

Scrub Head Skirt, 77

Scrub Pads, Replace, 59

Scrubbing, 26

Seals, 77Recovery Tank Seal, 77Solution Tank Seals, 77

Seat belts, 14

Seat, Operator, 14

Setting Brush Pressure, 24

Setting Conventional Solution Flow, 25

Setting ec-H20 Mode, 24

Setting ES (Extended Scrub) Mode, 24

Setting ES Solution Flow, 25

Setting FaST Mode, 24

Setting FaST Solution Flow, 25

Setting Scrub Modes, 24Setting Brush Pressure, 24Setting ec−H20 Mode, 24Setting ES (Extended Scrub) Mode, 24Setting ES Solution Flow, 25Setting FaST Mode, 24Setting Solution Flow, 25

Conventional and FaST Mode, 25ES (Extended Scrub) Mode, 25

Setting the Engine Speed, 12

Side Brush, 12

Side Brush (Option), 64Replacing the Side Brush, 64Replacing the Side Brush Squeegee (S/N

000000−002115), 73Replacing the Side Brush Squeegee (S/N

002116− ), 74

Side Brush Squeegee (S/N 002116- )(Option), Replacing, 74

Side Brush Squeegee (S/N 000000-002115)(Option), Replacing, 73

INDEX

94 T20 Gas/LPG 331470 (5−2016)

Side Brush, Replacing, 64

Side Squeegee Blades, 71Replacing or Rotating the Side Squeegee

Blades, 71

Side Squeegee Blades, Replacing or Rotating,71

Skirts and Seals, 77Recovery Tank Seal, 77Scrub Head Skirt, 77Solution Tank Seals, 77

Solution Tank Seals, 77

Spark Plugs, 55

Specifications, 85 - 88Braking system, 87ec−H20 system, 88FaST System, 88Hydraulic System, 85Machine Capacities, 85Machine Dimensions, 85Machine Performance, 85Power Type, 86Steering, 87Tires, 87

Spray Nozzle (Option), 38

Squeegee Blades, 69Adjusting the Rear Squeegee Blade Deflection,

76Leveling the Rear Squeegee, 75Replacing (or Rotating) the Rear Squeegee

Blades, 69Replacing or Rotating the Side Squeegee

Blades, 71Replacing the Side Brush Squeegee Blade (S/N

000000−002115) (Option), 73Replacing the Side Brush Squeegee Blade (S/N

002116− ) (Option), 74

Squeegee Caster Bearings, 48

Squeegee Protectors (Option), 15

Starting the Machine, 21

Steering, Specifications, 87

Steering column tilt knob, 14

Steering Cylinder Bearing, 48

Storage Information, 81Freeze Protection, 82Priming the ec−H20 system, 84Storing the Machine, 81

Supervisor Control Buttons, 13

Symbol definitions, 10 - 12

T

Temperature, Operating, 18

Timing Belt, 56

Tires, 78Specifications, 87

Torque Shaft Nut, Propelling Motor, 78

Torque Tubes (Cylindrical Brushes), 49

Torque Tubes (Disk Brushes), 49

Touch Panel, 9

Towing the Machine, 79

Transporting the Machine, 79

Turning Off the Machine, 21

V

Vacuum Wand (Option), 39

Vaporizer, 54

W

Warning Indicators, 11, 36Charging System Indicator, 11Check Engine Indicator, 11Conditions / Warnings, 37Engine Oil Pressure Indicator, 11Fault Indicators, 36

Water Pickup Mode (No Scrubbing), 28

Wheels, 78

While Operating the Machine, 18

Documents

(Gas / LPG) Rider Scrubber Operator Manualassets.tennantco.com/globalassets/technicalassets/operator and... · Operator Manual 331470 Rev. 16 (5-2016) (Gas / LPG) ... It provides