Hydraulic Scissor LiftsOperating & Maintenance Instructions

With Illustrated Parts ListPublication Part No. 021887TorkLifts and DockLifts

VerticalModel Travel CapacityNumber (In) (lb)

TorkLiftsT24-022.................................24 ...................2200T36-015.................................36 ...................1500T36-022.................................36 ...................2200T36-044.................................36 ...................4400T36-060.................................36 ...................6000T1-36-020 .............................36 ...................2000T1-36-040 .............................36 ...................4000T1-36-060 .............................36 ...................6000T1-36-080 .............................36 ...................8000T1-36-100 .............................36 .................10000T1-36-120 .............................36 .................12000T1-48-025 .............................48 ...................2500T1-48-040 .............................48 ...................4000T1-48-060 .............................48 ...................6000T1-48-080 .............................48 ...................8000T1-48-100 .............................48 .................10000T1-48-120 .............................48 .................12000T1-48-160 .............................48 .................16000T1-48-200 .............................48 .................20000T1-60-025 .............................60 ...................2500T1-60-040 .............................60 ...................4000T1-60-060 .............................60 ...................6000T1-60-090 .............................60 ...................9000T1-60-120 .............................60 .................12000T1-60-160 .............................60 .................16000T1-60-200 .............................60 .................20000T1-72-020 .............................72 ...................2000T1-72-040 .............................72 ...................4000T1-72-060 .............................72 ...................6000

DockLiftsDL-48-025.............................48 ...................2500DL-59-025.............................59 ...................2500DL-59-040.............................59 ...................4000DL-59-060.............................59 ...................6000DL-59-090.............................59 ...................9000DL-59-120.............................59 .................12000DL-59-160.............................59 .................16000DL-59-200.............................59 .................20000DL-59-300.............................59 .................30000

DANGERThis manual contains important information for correct installation,operation and maintenance of the equipment described herein. Allpersons involved in such installation, operation and maintenanceshould be thoroughly familiar with the contents. To safeguardagainst the possibility of personal injury or property damage,follow the recommendations and instructions of this manual andkeep it for further reference.

Note: The equipment shown in this manual is forcommercial use only.

1

Table of Contents

Section I General Information PageIntroduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2Unbalanced Loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4Operating Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4Raising Blocks Under Lifts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Section II Installation Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Section III Trouble Shooting/Service SuggestionsIf lift will not raise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7Lift raises slower than specified rate or will raise only partial load . . . . . . . . . . . . . . . . . .7When lift slowly settles with lowering valve closed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7If lift will not lower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7If lift will not raise to full vertical travel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7If lift does not lower smoothly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Section IV MaintenanceLubrication and Maintenance Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Section V Parts IdentificationLubrication and Maintenance Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9Exploded Drawing and Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10Typical Pump Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11Typical Hydraulic Cylinder Parts List/Repair Procedure . . . . . . . . . . . . . . . . . . . . . . . . .14

Section VI Hydraulic Schematics and Wiring DiagramsStandard Pump Unit with Integral Lowering Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15Standard Pump Unit with External Lowering Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . .15Single Phase Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17Three Phase Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

List of FiguresFig. 1 Stabilizer Hinge Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4Fig. 2 Typical Pit Mount Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5Fig. 3 Anchor Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5Fig. 4 Typical Pit Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6Fig. 5 Provide Appropriate Vertical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7Fig. 6 Lubrication and Inspection Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9Fig. 7 Exploded Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10Fig. 8 Standard Pump Unit with Integral Lowering Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11Fig. 9 Standard Pump Unit with External Lowering Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11Fig. 10 External Pump Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11Fig. 11 Parts Identification of Pump with Integral Lowering Valve . . . . . . . . . . . . . . . . . . . . . . .12Fig. 12 Parts Identification Pump with External Lowering Valve . . . . . . . . . . . . . . . . . . . . . . . . .13Fig. 13 Parts Identification of Hydraulic Cylinder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14Fig. 14 Hydraulic Schematic–External Lowering Valve Normally Closed . . . . . . . . . . . . . . . . . .15Fig. 15 Hydraulic Schematic–Integral Lowering Valve Normally Closed . . . . . . . . . . . . . . . . . . .15Fig. 16 Hydraulic Schematic–Typical Two Hydraulic Cylinder System . . . . . . . . . . . . . . . . . . . .16Fig. 17 & 18 Electrical Schematic–Single Phase Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17Fig. 19 Electrical Schematic–Three Phase Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Please record the following information and refer to it when calling your dealer or American Lifts.

Model Number:_______________Serial Number: __________________InstallationDate:_____/____/_____ ___________________

2

INTRODUCTION

GENERAL Safety Instructions: To assure maximumsafety, optimum performance, and to gain knowledgeof the product, it is essential that you or any otheroperator of this lift read and understand the contentsof this manual before it is operated. Pay particularattention to the SAFETY INFORMATION highlightedby this symbol. Following this symbol are CAUTION,WARNING or DANGER safety instructions. Failure tocomply with the instruction may result in personalinjury or death.

Safety statements, are incorporated in this manual inhope of reducing the number of industrial injuries thathappen each year. Please read and follow all safetywarnings and operate your lifts in a safe manner.

Since scissor lifts are very versatile machines, they arewell suited to customization for virtually thousands ofdifferent applications. Therefore, the statements setforth in this document are not necessarily all-inclusive,and all conceivable or unique situations may not beconsidered. In unique applications, the owner mayneed to supplement the standard statements withapplication-specific advisories. American Lifts can helpaddress these needs, but will not be responsible forinjury or damage caused by neglected or misusedequipment.

THIS UNIT CONTAINSMOBIL DTE-13 HYDRAULIC FLUIDFOR HEALTH HAZARD WARNING,SEE M.S.D.S. WITH MAINTENANCE

MANUAL ATTACHED

THIS UNIT IS EQUIPPED FOR SURFACE MOUNTING ONLY.

DO NOT INSTALL IN A PIT WITHOUT FIRST CONTACTING

AMERICAN LIFTS

▲WARNINGDo not stand sit or ride on lift.

To avoid bodily injury, stand clearwhile lift table is moving

!

▲WARNINGDo not operate this equipment without handrails and snap chains.

!

CAUTIONDAMAGE TO PUMP MAYOCCUR IF OPERATED IN

WRONG DIRECTION

003833

003827

003835

003836

▲WARNINGDo not work under liftwithout maintenance device.

!

003834

003817

021070

003744003323

B E F O R E C L E A N I N GO R S E R V I C I N G

D I S C O N N E C TP O W E R S U P P L Y

WARNING

To avoid bodily injury, read allinstructions before operatingor servicing lift.

Do not puthands or feetunder top.

Do notstand, sitor ride onlift.

Do not workunder liftwithoutmaintenancedevice.

WARNING

The serverity of the hazards in the following instructionsare identified as per ANSI Z535.4 and MH29.1

“DANGER”- Immediate hazard which will result in severe personal injury or death. (Electrical and Under the Platform.)

“WARNING”- Hazard or unsafe practice which could result insevere personal injury or death. (Top of Platform, Handrails.)

“CAUTION”- Hazard or unsafe practice which could result inminor personal injury or property damage.

WARNINGEnsure that the path of the lift is free ofobstructions and that all personnel are a safedistance away from the lift.

Ensure that all safety devices are in place andinspect for signs of disrepair (frayed wires,leaking hoses, bent members, etc.) If any partis missing or appears to be in disrepair, do notuse the lift. Use approved lockout/tagoutprocedures and contact qualified maintenancepersonnel immediatetly.

As the lift moves up and down, “pinch points”are formed. KEEP HANDS, FEET, HAIR,JEWELRY, LOOSE CLOTHING, etc. AWAYFROM THESE PINCH POINTS. If any of theseitems become caught, serious personal injuryor death could occur.

The DANGER / CAUTION / WARNING labelson the lift are there for the safety of the operators.If any label is worn, missing, or has been paintedover, REPLACE IT before resuming operation.

Ensure that the hydraulic, pneumatic andelectrical lines will not be pinched by the lift asit raises or lowers. If a line becomes pinched,the lift may not work properly. A hose maybreak, the lift table may drop suddenly, andsomeone may be injured. If an electrical lineis broken, severe personal injury or death canoccur due to electrical shock.

SAFETY AND INSTRUCTION DECALS: Thedecals shown on this page are installed on the liftas appropriate. If any become damaged orillegible, replace them.The decal part number islisted below and in your parts catalog. Replacementdecals can be ordered from American Lifts.

3

WARNINGRead the motor nameplate and record themotor full load current. Consult local electricalcodes for power supply fusing requirements.TO ADVOID FIRE HAZARDS, FOLLOWTHESE FUSING REQUIREMENTS.

DO NOT use the unit to lift people unless it hasbeen specifically equipped in accordancewith ANSI MH29.1, OSHA and all local codes.Severe personal injury or death may resultfrom using a lift without appropriate personnellifting safety equipment.

DO NOT attempt to bypass or disconnect themaximum travel limit switch if installed. Also,do not adjust the switch such that it allows thelift to raise more than its rated vertical travel. Ifyou exceed the rated vertical travel, you couldoverload the lift. This can cause the lift to failsuddenly, possibly resulting in severepersonal injury or death.

Spilled hydraulic fluid is very slippery, andmay also present a fire hazard. Clean up allspilled hydraulic fluid to reduce the risk ofslipping or fire.

Release of fluids under high pressure cancause personal injury.

DO NOT use any part of your body tocheck for leaks.

Before opening any part of the hydraulicsystem or disconnecting hoses or fittings,RELEASE THE HYDRAULIC PRESSURE(see.figure 5). Always use caution whendisconnecting any hydraulic components!Assume there may be some residualpressure remaining in the system.

If injured by high pressure fluids, seekemergency medical attention. Failure to doso could result in gangrene in effected areaor death.

Load CapacityTo prevent damage to the unit and/or severepersonal injury or death, NEVER EXCEEDTHE RATED CAPACITY OF THE LIFT. Thenominal capacity is based on a uniformlydistributed load. If the load is not uniformlydistributed, then edge or axle loads must beconsidered.

CAUTION

The user must ensure that the unit is installedin accordance with all local codes whichmay apply.

All servicing must be performed by qualifiedpersonnel only. Qualified personnel shouldbe able to read and understand electricaland hydraulic diagrams. They should beable to troubleshoot hydraulic and liveelectrical circuits safely and in accordancewith accepted practice.

Ensure that this manual is available to allpersonnel installing, using or maintaining thelift table. Require these persons to usethis manual prior to installing, operating orservicing the table.

Maintain all information and safety decals onthe table and in the proper condition.

Unauthorized modifications to the lift, itshydraulic power unit or its control systemmay compromise the performance and safetyof the system. UNDER NO CIRCUMSTANCESshould you attempt any repair or servicingthat is not covered in this manual.

IF YOU HAVE ANY QUESTIONS ABOUT ANYOF THE INSTRUCTIONS IN THIS MANUAL,PLEASE CONTACT AMERICAN LIFTS.

Edge loads:Edge capacity ratings are the maximumalong any edge of the platform. Maximumedge loads are stamped on the serialnumber plate. If the load is rolled onto thelift in any position other than the FULLYlowered, it is considered to be an axle load.

Axle Loads:For axle loads, the edge load rating must bereduced by 33%.

The capacity is displayed on the labels whichare attached to the lift, and also on the serialnumber plate. Note that the serial numberplate is only valid for the platform suppliedwith the unit in an unmodified condition. Ifyou remove, replace or modify the platform,contact American Lifts to obtain a new serialnumber plate.

The Hydraulic Scissor Lifts have the load capacityrating and serial number stamped on a metal plateattached to one end of the lift platform. Most liftsalso have the serial number stamped in the upperflange of the base frame channel near a corner. Thecapacity is a gross rated maximum capacity. Wheregravity roll sections, special tops, or other optionsare installed on the lift, deduct the weight of thesefrom the load rating to obtain the net capacity. Liftsshould not be overloaded beyond the establishedcapacity, as injury or damage may result.

Unbalanced LoadingsStabilization provided is basically for evenlydistributed loads. Allowances are not made forspecial sizes or features. For unbalanced loadratings consult the factory.

Operating CharacteristicsThe hydraulic system, usually contained in the baseof the lift table, consists of a direct coupled motorand pump combination, oil reservoir, solenoidoperated lowering valve, and all necessary piping.The pump is a positive displacement type andoperates at a design working pressure of less than2,000 psi. A preadjusted, built-in relief valve protectsthe hydraulic system from excess pressure.

The operating principle provides that the pump isoperated to raise the table, and the pump is stoppedwhen the table attains the desired elevation. Acheck valve and lowering valve between the pumpand ram holds the table at elevation. For lowering to

4

Section I. General Information

any desired level, the solenoid valve is energized toallow fluid to return from hydraulic cylinder toreservoir. A pressure compensated flow controlvalve is connected to the hydraulic cylinder tocontrol the down speed at a predetermined rateunder all load conditions.

Some units will have continuously operatingmotors. On these units, both up and down arecontrolled by solenoid valves.

All automatic controls added to the lift mustinclude provision for shutting off the pumping unit atthe end of the lift travel.

Raising Blocks Under LiftsWhere it is desired to raise the base of the lift togive a greater collapsed height to the unit, supportmembers can be placed longitudinally ortransversely. When longitudinal members are usedthey should be under all long rails of the base.When transverse supporting is necessary, it isimportant to provide members beneath the lift armhinge points and also the areas of stabilizer hingepoints and rollers. See Figure 1 below.

Call American Lifts if you have questions.

Fig. 1Proper support of lift base frame

DANGERInsure the lift is mounted on a stable surface!If the lift is mounted on an unstable surface, itmay tip over when it is in use. This couldresult in severe personal injury or death, anddamage to the unit and its payload.

CAUTION

Before operating disengage maintenancedevice. If maintenance device is engaged andlift is operated, damage to the lift will result.

5

Section II. Installation Information

Installation of hydraulic lifts may be subject tolocal codes, rules and regulations, permits andinspections. Check local regulations before youinstall the lift.

The illustration above shows the most desirableposition of the lift for greatest stability when movingloads on and off the platform when in the raisedposition.

Lifts are shipped on a skid or pallet. If your liftwas designed to be pit mounted, the platform ordeck can be lifted off of the top frame after removingthe screws located on top of the platform or deck.The lift can then be removed from the skid or palletwith slings placed around the base frame or bottom.Be careful not to deform any of the frame structure.

Lifts designed to be surface mounted are builtwith the decks welded on and should not be lifted bythe deck or top frame. Caution: Doing so may resultin damage to the cylinder base mounting straps.

If the lift is pit mounted, position the lift and alignthe frame carefully so that 1⁄2" to 11⁄4" is maintainedbetween the platform or deck and the pit wall. Levelthe unit and place solid shims under the base frameas illustrated.

Where anchor clips have been provided, the boltfit should be close to restrict shifting of lift. Thisrequires careful location of the anchor bolts withconsideration of the frame platform and pit. See Fig.(3) for installation procedure.

To Install Anchor Bolts Refer ToManufacturers Instructions.

Recommended concrete anchor bolts are:HILTI “Kwik-Bolt”, Molly Parabolt or similar.1. Be sure lift is positioned as described

above. Drill holes in concrete the samediameter as anchor bolts, using anchorbracket hole as guides. Depth is not critical– drill sufficiently deep.

2. With nut and washer on anchor bolts, driveanchor bolts into holes so that a minimumof six to seven threads are below the topsurface of the anchor clips.

3. Tighten nuts securely. Be sure enough forceis used to spread anchor bolt wedges(usually 3 or 4 turns beyond ‘finger tight’).After lift has been aligned, leveled andshimmed, and anchor bolts have beeninstalled, pour 1" of grout under entire baseframe. When set and cured, tighten nuts onanchor bolts. Run hydraulic hose orelectrical cord through conduit in pit wall.Replace platform.

Fig. 3Anchor Installation

Fig. 2 Typical Pit Mount Installation

1" OF GROUT UNDERSIDE CHANNELS ONLY

ROLLING END

WHEN ELEVATED. LOADS RAISED DOCK OR TRUCK BEDMOVE OFF OR

OVER THE EDGE OFPLATFORM NEAREST THE PINNED ARM END.

SHIMS

WARNINGPit mounted units must be equipped withbeveled toe guards or other ANSI MH29.1approved toe protection. Without approved toeprotection, a shear point can exist whichpresents an imminent danger of toe injuryor severance.

DANGERThe lift’s electrical compon-ents can create sparks.DO NOT install the lift, thepower unit, or any controlsin an area where potentiallyexplosive dusts, gases orvapors may be present.Failure to comply with thiswarning may result in anexplosion!

DANGERProtect the power unit and any electricalcomponents from rain or moisture. If electricalcomponents get wet, personnel may beseverely injured or killed by electrical shock.Also, electrical parts may fail if they are wet.

WARNINGWhen installinganchor bolts wear allnecessary safetyprotection

6

Suggestions for Installation of American Hydraulic LiftsWhen Permanently Anchored or Placed in Pit

Fig. 4Typical Pit Drawing

1 1/4

1 1/4

1 1/4 1 1/4

PITWIDTH

DECKWIDTH

ANCHORCENTERS

VERTICALTRAVEL

PITDEPTH

LOW HT.W/ DECK

1" MIN. GROUTUNDER LIFT BASEAFTER SHIMS

PIT RIM. SUGGEST MIN.L2 X 2 X 1/4BY CUSTOMER

ANCHOR CENTERSSUITABLE PIT DRAIN BY CUSTOMER

SECTION A-A

2" MIN. CONDUIT W/ SWEEP BENDFOR ELECT. OR HYD. ENTRYBY CUSTOMER, LOCATION OPTIONAL

OPTIONEXTERNAL PUMP UNIT ALCOVEBY CUSTOMER. LOCATION OPTIONALUSED ONLY WHEN CUSTOMERREQUIRES UNIT BELOW FLOOR

HOLE FOR ANCHOR BOLTINSTALL W/ LIFT IN PLACE BY CUSTOMER

DECK LENGTH

PIT LENGTH

Section II. Installation Information continued…

If lift will not raise:a. Check electric circuit (See Section VI). On new

installations of 3-phase motors, if lifts do notstart raising in approximately 10 seconds,reverse two power supply leads to reversepump rotation.

b. Check oil level.

With lift in full up position, oil level should beapproximately 11⁄4" above tank bottom.

Lift raises slower than specified rate or will raiseonly partial load:Note: Allowance must be made for slight speedvariations due to temperature which changesthe viscosity of the hydraulic oil.

a. Check line voltage under load condition. Lowvoltage affects capacity.

b. If foam is visible in tank oil, check for a looseconnection in suction line between pump andtank. Tighten connections.

Lift slowly settles with lowering valve notenergized:

a. Flush lowering valve by cycling lift up and down.This should be done with no load.

b. If lift continues to settle, replace down valvecartridge.

c. If lift continues to settle, replace pump.

If Lift will not lower:a. Look for mechanical restrictions.

b. Test valve coil for operation. Check voltage atcoil.

c. If voltage is ok, replace coil.

If lift will not raise to full vertical travel:a. Check for low oil level.

b. If necessary, add oil.

If lift does not lower smoothly:a. Run lift up and down under load a few times to

purge air.

7

Section III. Trouble Shooting/Service Procedures

CAUTIONDO NOT overfill.

Only trained and qualified personnel shouldperform service procedures. Before performinglubrication or maintenance work on the lift alwaysfollow the PROCEDURE LISTED BELOW:

1. The maintenance device has been designedfor use only when the lift is unloaded. If youengage the maintenance device with load on the platform, the device or structuralmembers could fail suddenly, causingdamage to the lift and possibly causingsevere personal injury or death.

A falling lift can cause severe personal injuryor death. Before working under the lift,RAISE THE LIFT AND ENGAGE THEMAINTENANCE DEVICE, AS SHOWN IN(applicable insert, figure 5). Do this everytime you work under the lift!

2. Provide appropriate vertical supports or usebuilt in maintenance device if available underlift deck to prevent lift from lowering.Consult the factory if there are anyquestions regarding this procedure.

3. Lower the lift onto support columns ormaintenance device until the hydraulic ramno longer supports the lift structure.

4. Follow OSHA lock-out/tag-out procedures.Disconnect and tag all electrical and/or otherpower sources to preclude untimelyactuation of the lift.

5. Inspect the condition of all pivot joints androller assemblies at each periodicmaintenance time for damage or wear.

Provide Appropriate Vertical Support

CAUTIONDO NOT run pump backwards.

Supports

MaintenanceDevice

Fig. 5Typical Built-In Maintenance Device.

Always Engage Both Sides

DANGER

DANGER• Lift must be empty (no load) before performing

maintenance work.• Maintenance devices must be engaged on

both sides prior to maintenance or lubrication.• If lift does not have built in maintenance

devices, block platform as shown on page 7,Figure. 5.

8

Section IV. Lubrication and Maintenance Instructions

We recommend that lubrication and preventivemaintenance work should be conducted on aregular schedule that is established on the basis ofexperience gained during the first few months ofoperation. The need for lubrication and inspection islargely proportional to actual service duty, environ-ment, and application, but it is also advisable toinspect and re-lubricate the lift following a prolongedperiod of non-use.

Lifts should be lubricated and completelyinspected at least once a week during the firstmonth of regular operations. It is likely that suchfrequent attention will prove unnecessary but willresult in the establishment of a realistic schedule. Asuitable lubricant, such as Mobilith AW1, should beused.

Inspection should include careful examination ofall fastenings, pivot pins, rolling surfaces and rollers,hydraulic connections, electrical systems andgeneral functions. If there is a persistentaccumulation of debris, water or other harmful

materials present in any part of the lift, resulting fromenvironment or the materials being handled, the liftshould be cleaned and consideration given to meansfor the prevention of such conditions.

The preferred pump unit hydraulic fluid should beMobil DTE-13 or any equivalent petroleum basedfluid with a viscosity index of 90 or higher.

The use of multi-grade motor oil SAE 10W-30 ispermissible where the above fluids are not readilyavailable.

Since the viscosity of the hydraulic fluid isreduced by an increase in temperature, frequent useof the lift under conditions of normal ambienttemperature, as well as even less frequent usagewith ambient temperature above 100°F or over, mayresult in fluid temperature of 150°F or more. Underthese conditions, the lift can be expected to risemore slowly. Avoid temps over 150°F.

When these conditions exist, a fluid of higherviscosity may be required such as Mobil DTE-15.Fluids with a high viscosity index in the range of140-150 will perform well at these elevatedtemperatures.

At extremely low ambient temperatures, the pourpoint of the hydraulic fluid becomes a critical factor.It is recommended that the hydraulic fluid have apour point at least 30°F lower than the lowestambient temperature expected. Consult the factory.

Do not use synthetic hydraulic fluids whichcontain elements that may swell or dissolve sealmaterials normally used in the systems designed forpetroleum based fluids. For special fluids consult thefactory.

WARNINGDO NOT GO NEAR LEAKS

• High pressure oil easily punctures skin causingserious injury, gangrene or death.

• If injured, seek emergency medical help.Immediate surgery is required to remove oil.

• Do not use finger or skin to check for leaks.• Lower load or relieve hydraulic pressure before

loosening fittings.

WARNINGDO NOT SPILL OR DUMP OIL.

• Oil burns at 350°F.• Injury could result if not cleaned up.• Oil is a regulated/hazardous waste.• Capture oil when repairing or draining systems.• Disposal must conform to state/federal regulations.• Do not overfill containers or reservoirs.• You could be seriously injured or fined for

failing to conform to instructions.

Before cleaning or servicingdisconnect power supply.

DANGER

9

Section IV. Lubrication and Maintenance Instructions continued…

Fig. 6Lubrication and Inspection Points

Lubrication Points. Lubricate with lift unloadedand meeting requirements in Fig. 5.A. Points noted, apply pressure grease gun

lubrication. Use Mobilith AW1 or equal.B. Points noted, apply oil can lubrication.C. Points noted no lubrication required (factory

lubricated and sealed)

Inspection Check Points1. Visually inspect all lift arm pivot pins to ensure

that retaining device has not loosened.2. Visually inspect all ram crank pins, pivot pins

to ensure that the set screw has not loosened,allowing pins to move.

3. Visually inspect all ram crosshead roll pins toensure that roll pin is seated correctly.

4. Visually inspect all ram base thrust pins andkeeper bolts to ensure that thrust pin is seatedin notch and keeper bolts are tight.

5. Visually inspect all lift arm rolling bearings toensure that bearing bolts are tight.

6. Visually inspect all hydraulic hoses and fittingsto ensure there are no chafed hoses or leakingfittings.

7. Visually inspect all electrical lines to ensurethere are no chafed wires or loose cords.

8. Visually inspect the entire lift structure.

C

10

Section V. Parts Identification

General Parts IdentificationTo order parts, you must includewith your order the model numberand serial number as shown onthe nameplate attached to theend of the platform on lift.

Item Description

1 Base Frame Assembly2 Top Frame/Deck Assembly3 Not Used4 Not Used5 Not Used6 Not Used7 Roller Bearing Assembly8 Not Used9 Pivot Pin /Shaft Assembly

10 Not Used11 Not Used12 Not Used13 Hydraulic Cylinder Crosshead

Assembly14 Hydraulic Cylinder Base Pin

Assembly15 Hydraulic Cylinder Assembly16 Not Used17 Flow Control18 Hydraulic Tank19 Motor20 Pump21 Solenoid Valve22 Foot Switch/Push Button (Not

Shown)23 Inner Lift Arm Assembly24 Outer Lift Arm Assembly25 Nameplate/Serial Number Plate

(Not Shown)26 Safety Label Kit (Not Shown)

Fig. 7 Exploded Drawing and Parts List

TorkLift

DO NOT ATTEMPT TO REMOVE OR LOOSENCENTER PIVOT PINS, HINGE PINS OR ARMROLLERS. Removing or loosening these partscould cause the lift to suddenly collapse, EVEN IFTHE MAINTENANCE DEVICE IS ENGAGED. Ifany of these components require service: Removeall loads from the lift platform, lock-out power to thelift and tag as unsuitable for service, clear the areasurrounding the unit, contact manufacturer forinstructions.

DANGER

DO NOT remove, adjust or tamper with the flowcontrol valves installed at the base of the hydrauliccylinder. Tampering with them could cause the flowcontrol valve to fail, which would prevent the valvesfrom slowing the descent of the lift in the event of ahose failure. A free-falling lift can cause severepersonal injury or death to persons working in itsvicinity, as well as causing damage to the liftstructure and components.

DANGER

11

Section V. Parts Identification continued…

Fig. 8Standard Pump Unit with Integral Lowering Valve

Fig. 9Standard Pump Unit with External Lowering Valve

Fig.10External Pump Unit

12

Section V. Parts Identification continued…

Fig. 11Parts Identification of Pump with Integral Lowering Valve

Adjustments

DO NOT CHANGE THE SETTING ON THE RELIEF VALVE. If the setting is changed, this maycause the lift to suddenly fail. Severe personal injuryor death may result, and/or the lift and the payloadmay be damaged. The hydraulic and structuralcomponents of the lift are designed to handle acertain amount of pressure. The relief valve hasbeen set to relieve this pressure before it becomestoo great. The relief valve has been included for theprotection of all personnel using the lift.

Service

Built in maintenance device or posts must be inplace during service (See fig. 5.)

The pump components are not serviced separately,do not attempt to replace gears, bearings, shafts orother major parts of the pump. Order a replacementpump identified by the lift serial number.

When assembling pump to motor, be sure theintermediate coupling aligns with motor shaft andpump tang.

DO NOT operate this pump against relief valveby overloading or by holding in the extremeraised position any period greater than fiveseconds. When “Automatic Return” controls areused, provision must be made to stop the pumpimmediately upon reaching the raised position.

DO NOT run the standard pumping unit continuouslyor use on applications requiring more than fivestarts per minute in continuous service. A specialpump unit, externally mounted, equipped with acontinuous duty motor and normally open by-passvalve, is available for more than five starts perminute. If the duty cycle exceeds one fully loadedcycle every five minutes, a special pump unit maybe required. Contact factory for more information.

Motor

PumpCoupling

Pump

LoweringValveCoil Lowering

ValveCartridge

Breather Vent

HydraulicReservoir

DANGER

DANGER

CAUTION

13

Section V. Parts Identification continued…

HydraulicReservoir

Lowering Valve Body

Lowering Valve Cartridge

Pump Coupling

Motor

Capacitor

Breather Vent

Lowering Valve Coil

Pump

Fig. 12Parts Identification of Pump with External Lowering Valve

Adjustments

DO NOT CHANGE THE SETTING ON THE RELIEF VALVE. If the setting is changed, this maycause the lift to suddenly fail. Severe personal injuryor death may result, and/or the lift and the payloadmay be damaged. The hydraulic and structuralcomponents of the lift are designed to handle acertain amount of pressure. The relief valve hasbeen set to relieve this pressure before it becomestoo great. The relief valve has been included for theprotection of all personnel using the lift.

Service

Built in maintenance device or posts must be inplace during service (See fig. 5.)

The pump components are not serviced separately,do not attempt to replace gears, bearings, shafts orother major parts of the pump. Order a replacementpump identified by the lift serial number.

When assembling pump to motor, be sure theintermediate coupling aligns with motor shaft andpump tang.

DO NOT operate this pump against relief valve byoverloading or by holding in the extreme raisedposition any period greater than five seconds. When“Automatic Return” controls are used, provision mustbe made to stop the pump immediately uponreaching the raised position.

DO NOT run the standard pumping unit continuouslyor use on applications requiring more than five startsper minute in continuous service. A special pumpunit, externally mounted, equipped with a continuousduty motor and normally open by-pass valve, isavailable for more than five starts per minute. If theduty cycle exceeds one fully loaded cycle every fiveminutes, a special pump unit may be required.Contact factory for more information.

DANGER

DANGER

CAUTION

14

Section V. Parts Identification continued…

Fig. 13Parts Identification of Hydraulic Cylinder

Repair PartsWhen ordering parts specify the Cylinder ModelNumber stamped on the base of the cylinder. A repairkit is available. Reference item 15 above.

DANGERDO NOT use compressed air to push piston outof the cylinder.

Procedure to Disassemble Hydraulic Cylinder1. Remove the Spirolox ring from the rod guide.2. Drive the rod guide back into the ram with a soft

hammer.3. When the rod guide is past the wire lock ring,

remove the ring from the groove in the cylinder.4. When the rings are removed pull the whole rod

assembly out of the cylinder.5. Remove lock nut from base of rod.6. Remove piston.

Procedure to Assemble Hydraulic Cylinder1. Fit piston on threaded end of rod, make sure

static “O” ring is in place between piston and rod.2. Place self locking nut on rod thread and tighten.3. Put all of the seals and wear strips on the piston

and rod guide.4. Lubricate the cylinder, piston and rod guide with

hydraulic fluid.5. Place the assembly piston down, rod up and slide

the rod guide over the rod down to the piston.6. Drop the piston and guide down into the cylinder.

Rod guide will have to be tapped down past thegroove in the cylinder.

7. Insert lock wire in cylinder groove.8. Force rod guide up against lock wire with

compressed air inserted into the guide breathervent.

9. When the guide is in place against the lock wireinstall the Spirolox ring in the top groove.

Item Description1 Thin Nut

* 2 Wear Ring* 3 Polyseal* 4 O-Ring

5 Piston

Item Description6 Rod

* 7 O-Ring* 8 Wear Strip

9 Snap Ring10 Retaining Ring11 Rod Guide

Item Description* 12 Wiper Strip

13 Breather Vent14 Cylinder Barrel15 Repair Kit (Includes Items

2, 3, 4, 7, 8 & 12)

* Repair Kit Parts

① ② ③ ④ ⑤ ⑥ ⑦ ⑧ ⑨ ⑩ ➄ ➅11 12

➅13

➅14

15

Section VI. Hydraulic Schematics and Wiring Diagrams

Fig. 15Integral Solenoid Lowering Valve, Normally Closed. Reference Fig. 8

Fig. 14 Typical Solenoid Lowering Valve, Normally Closed. Reference Fig. 9

Breather Vent

Lowering Valve

PumpAssembly

Motor

HydraulicReservoir

Strainer

Relief Valve

Check Valve

Hydraulic Hose

Flow Control Valve

Hydraulic Cylinder

HydraulicReservoir

Strainer

Relief Valve

Check Valve

Hydraulic Hose

Flow Control Valve

Hydraulic CylinderBreather Vent

Lowering Valve

Screen

Pump Assembly

Motor

16

Section VI. Hydraulic Schematics and Wiring Diagrams continued…

Breather Vent

Hydraulic Cylinder

Flow Control Valve

Master Flow Control Valve(Controls Down Speed)

Lowering ValveNormally Closed

Motor Pump

Strainer

Tank

Relief Valve

Check Valve

Hydraulic Hose

Hydraulic Cylinder

Note: Check Valve& Relief Valve AreBuilt In Pump.

Fig. 16Hydraulic Schematic–

Typical Two Hydraulic Cylinder SystemDANGER

The lift’s electrical circuits usevoltages which can cause severeinjury or death, DO NOT WORKWITH THE ELECTRICAL PARTSUNLESS YOU ARE A QUALIFIEDELECTRICIAN!

17

Section VI. Hydraulic Schematics and Wiring Diagrams continued…

Foot Switch Control

Fig. 17Intermittent Running Pump Units

Single Phase, 115 Volts

Push Button Control

Fig. 18Intermittent Running Pump Units

Single Phase, 115 Volts

Power Supply Cord Control Cord

Motor with Built-inThermal Protection

Lowering Valve Coil

Lift Pump UnitFoot Switch

Grounded Plug

Grounded Plug

Motor with Built-inThermal Protection

Lowering Valve Coil

Lift Pump UnitPush Button Switch

Control Cord

Power Supply Cord15 Amp / 115 Volts

DANGER

The lift’s electrical circuits usevoltages which can cause severeinjury or death, DO NOT WORKWITH THE ELECTRICAL PARTSUNLESS YOU ARE A QUALIFIEDELECTRICIAN!

18

Section VI. Hydraulic Schematics and Wiring Diagrams continued…

Foot Switch or Push Button Control

Fig. 19Intermittent Running Pump Unit

Three Phase, 230/460 Volt with 115V Control.

DANGER

Before c leaning orservicing disconnectpower supply.

Limited WarrantyAmerican Lifts warrants that goods shall be free of defects in parts or workmanship for

twelve (12) months following receipt of goods. Defective parts shall be replaced byAmerican Lifts, FOB its manufacturing plant. This warranty shall not extend to labor

required to repair goods or replace defective parts, or related shipping costs.

Except where stated above, American Lifts makes no other warranties, either express orimplied, including the warranty of merchantability, and disclaims the same.

No action by the buyer arising out of this sale shall be commenced later than one year afterthe cause of action has occured. No consequential damages shall be allowed either in the

event of nonconformity or non-delivery of goods.

Rejection of nonconforming goods must be made by buyer in writing within seven (7) days ofreceipt of goods and all defects ascertainable at time of giving notice shall be stated with

particularity or be deemed waived.

If the goods, or any replacement parts are damaged in shipment, the buyer should file aclaim immediately with the carrier who delivered the equipment or replacement parts.

601 West McKee Street, Greensburg, IN 47240(812) 663-4085 (800) 426-9772 FAX (812) 663-6017

http://www.americanlifts.com

©American Lifts-1997021887 Rev 1

Printed in USA3/97