K-7500 Drain Cleaning Machine - Test Equipment … Drain Cleaning Machine 2 Ridge Tool Company General Safety Information WARNING! Read and understand all instructions. Failure to

Drain CleaningMachine

OPERATOR’S MANUAL

K-7500

WARNING!Read this Operator’s Manualcarefully before using thistool. Failure to understandand follow the contents ofthis manual may result inelectrical shock, fire and/orserious personal injury.

99 Washington Street Melrose, MA 02176 Phone 781-665-1400Toll Free 1-800-517-8431

Visit us at www.TestEquipmentDepot.com

http://www.testequipmentdepot.com/

Table of ContentsRecording Form for Machine Serial Number ..............................................................................................................1

General Safety Work Area Safety ........................................................................................................................................................2Electrical Safety...........................................................................................................................................................2Personal Safety ...........................................................................................................................................................2Tool Use and Care ......................................................................................................................................................3Service ........................................................................................................................................................................3

Specific Safety InformationDrain Cleaner Safety ...................................................................................................................................................3

Description, Specifications and Standard EquipmentDescription ..................................................................................................................................................................4Specifications ..............................................................................................................................................................4Standard Equipment....................................................................................................................................................4Cables and Flexible Leaders.......................................................................................................................................5Tools and Replacement Blades ..................................................................................................................................5

Machine AssemblyInstructions for Installing Handle .................................................................................................................................5Instructions For Installing Power Feed ........................................................................................................................6Instructions for Installing Cable ...................................................................................................................................6

Machine Inspection .......................................................................................................................................................6

Machine Set-Up..............................................................................................................................................................7

Operating InstructionsUsing Power Feed Machine ........................................................................................................................................8Using Manual Feed Machine.....................................................................................................................................10

Special Applications ProcedureMain Sewer or Septic Tank Overrun .........................................................................................................................10Reverse Operation ....................................................................................................................................................11Loading the Machine On Vehicle ..............................................................................................................................11Draining Drum ...........................................................................................................................................................11Power Feed Adjustment Procedure ..........................................................................................................................11Operating Machine In Reclined Position ...................................................................................................................12Drum Assembly Removal and Installation.................................................................................................................12Installing Extra Drum (Additional Cable) ...................................................................................................................13Pigtail Removal and installation ................................................................................................................................14Proper Tool Selection................................................................................................................................................15

Accessories ................................................................................................................................................................15

Maintenance InstructionsPower Feed Assembly ..............................................................................................................................................15Lubrication.................................................................................................................................................................15Cables .......................................................................................................................................................................15

Machine Storage ..........................................................................................................................................................15

Service and Repair ......................................................................................................................................................15

Troubleshooting ..........................................................................................................................................................16

Wiring Diagram ............................................................................................................................................................16

Lifetime Warranty..........................................................................................................................................Back Cover

ii

K-7500 Drain Cleaning Machine

Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176TestEquipmentDepot.com

K-7500 Drain Cleaning MachineRecord Serial Number below and retain product serial number which is located on nameplate.

SerialNo.

K-7500Drain Cleaning Machine

Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - TestEquipmentDepot.com


Ridge Tool Company2

General Safety InformationWARNING! Read and understand all instructions. Failure

to follow all instructions listed below mayresult in electric shock, fire, and/or seriouspersonal injury.

SAVE THESE INSTRUCTIONS!

Work Area Safety• Keep your work area clean and well lit. Cluttered

benches and dark areas invite accidents.

• Do not operate tools in explosive atmospheres,such as in the presence of flammable liquids, gas-es, or dust. Tools create sparks which may ignite thedust or fumes.

• Keep bystanders, children, and visitors away whileoperating a tool. Distractions can cause you to losecontrol.

Electrical Safety

• Grounded tools must be plugged into an outlet,properly installed and grounded in accordancewith all codes and ordinances. Never remove thegrounding prong or modify the plug in any way.Do not use any adapter plugs. Check with a qual-ified electrician if you are in doubt as to whetherthe outlet is properly grounded. If the tools shouldelectrically malfunction or break down, grounding pro-vides a low resistance path to carry electricity awayfrom the user.

• Avoid body contact with grounded surfaces suchas pipes, radiators, ranges and refrigerators. Thereis an increased risk of electrical shock if your body isgrounded.

• Don’t expose electrical tools to rain or wet condi-tions. Water entering a power tool will increase therisk of electrical shock.

• Do not abuse cord. Never use the cord to carry thetools or pull the plug from an outlet. Keep cordaway from heat, oil, sharp edges or moving parts.Replace damaged cords immediately. Damagedcords increase the risk of electrical shock.

• When operating a tool outside, use an outdoor ex-tension cord marked “W-A” or “W”. These cords arerated for outdoor use and reduce the risk of electricalshock.

• Use only three-wire extension cords which havethree-prong grounding plugs and three-pole re-ceptacles which accept the machine’s plug. Use ofother extension cords will not ground the tool and in-crease the risk of electrical shock.

• Use proper extension cords. (See chart.) Insufficientconductor size will cause excessive voltage drop andloss of power.

• Before using, test the Ground Fault Circuit Inter-rupter (GFCI) provided with the power cord toinsure it is operating correctly. GFCI reduces the riskof electrical shock.

• Extension cords are not recommended unlessthey are plugged into a Ground Fault Circuit Inter-rupter (GFCI) found in circuit boxes or receptacles.The GFCI on the machine power cord will not pre-vent electrical shock from the extension cords.

• Keep all electrical connections dry and off theground. Do not touch plug with wet hands. Reducesthe risk of electrical shock.

Personal Safety

• Stay alert, watch what you are doing and use com-mon sense when operating a power tool. Do notuse tool while tired or under the influence of drugs,alcohol, or medications. A moment of inattentionwhile operating power tools may result in serious per-sonal injury.

• Dress properly. Do not wear loose clothing orjewelry. Contain long hair. Keep your hair andclothing away from moving parts. Loose clothes,jewelry, or long hair can be caught in moving parts.

• Avoid accidental starting. Be sure switch is OFF be-fore plugging in. Carrying tools with your finger on theswitch or plugging tools in that have the switch ON in-vites accidents.

Grounding prong

Cover ofgroundedoutlet box

Grounding prong

Minimum Wire Gauge for Extension CordNameplate

AmpsTotal Length (in feet)

0 – 25 26 – 50 51 – 1000 – 6 18 AWG 16 AWG 16 AWG6 – 10 18 AWG 16 AWG 14 AWG

10 – 12 16 AWG 16 AWG 14 AWG12 – 16 14 AWG 12 AWG NOT RECOMMENDED


Ridge Tool Company 3

• Remove adjusting keys or wrenches before turningthe tool ON. A wrench or a key that is left attached toa rotating part of the tool may result in personal injury.

• Do not over-reach. Keep proper footing and bal-ance at all times. Proper footing and balance enablesbetter control of the tool in unexpected situations.

• Use safety equipment. Always wear eye protec-tion. Dust mask, non-skid safety shoes, hard hat, orhearing protection must be used for appropriate con-ditions.

Tool Use and Care

• Use clamp or other practical way to secure andsupport the workpiece to a stable platform. Holdingthe work by hand or against your body is unstableand may lead to loss of control.

• Do not force tool. Use the correct tool for yourapplication. The correct tool will do the job betterand safer at the rate for which it is designed.

• Do not use tool if switch does not turn it ON orOFF. Any tool that cannot be controlled with the switchis dangerous and must be repaired.

• Disconnect the plug from the power source beforemaking any adjustments, changing accessories, orstoring the tool. Such preventive safety measures re-duce the risk of starting the tool accidentally.

• Store idle tools out of the reach of children andother untrained persons. Tools are dangerous inthe hands of untrained users.

• Maintain tools with care. Keep cutting tools sharpand clean. Properly maintained tools with sharp cuttingedges are less likely to bind and are easier to control.

• Check for misalignment or binding of movingparts, breakage of parts, and any other conditionthat may affect the tool's operation. If damaged,have the tool serviced before using. Many acci-dents are caused by poorly maintained tools.

• Use only accessories that are recommended by themanufacturer for your model. Accessories that maybe suitable for one tool may become hazardous whenused on another tool.

• Keep handles dry and clean; free from oil andgrease. Allows for better control of the tool.

Service

• Tool service must be performed only by qualifiedrepair personnel. Service or maintenance performedby unqualified repair personnel could result in injury.

• When servicing a tool, use only identical replace-ment parts. Follow instructions in the MaintenanceSection of this manual. Use of unauthorized parts orfailure to follow maintenance instructions may create arisk of electrical shock or injury.

Specific Safety Information WARNING

Read this Operator’s Manual carefully before usingthe RIDGID K-7500 Drain Cleaner. Failure to under-stand and follow the contents of this manual mayresult of electrical shock, fire and/or severe per-sonal injury.

Drain Cleaner Safety• Wear gloves provided with the machine. Never

grasp a rotating cable with a rag or loose fittingcloth glove. Could become wrapped around the cableand cause serious injury.

• Do not overstress cables. Keep one hand on thecable for control when the machine is running.Overstressing cables because of obstruction maycause twisting or kinking or breaking of the cable andresult in serious injury.

• Position machine within three feet of inlet. UseFront Guide Hose or properly support exposedcable when it is difficult to locate the machine nearthe access or clean out. Greater distances can resultin cable twisting, kinking or control problems.

• The K-7500 is designed for one-person operation.Operator must control foot switch and cable.

• Use foot switch to operate K-7500 while main-taining good footing and balance. Do not operatemachine in (REV) reverse. Operating machine inreverse can result in cable damage and is used onlyto briefly back tool out of an obstruction.

• Keep hands away from rotating drum and guidetube. Do not reach into drum unless machine is un-plugged. Hand may be caught in the moving partsresulting in serious injury.

• Use kickstand during operation. The kickstand sta-bilizes machine to prevent tipping.

• Be careful when cleaning drains where cleaningcompounds have been used. Avoid direct contactwith skin and eyes. Serious burns can result fromsome drain cleaning compounds.


4

Motor Type ...................115V 60Hz Reversible,Universal AC Motor

Rating: ..........................4/10 HP, 200 RPM

AMPS ............................6.0

Weight(Machine Only).............116 lbs.

Width ............................21″

Length ..........................31″

Standard EquipmentFor 3/4″ Cable

• K-7500 Machine with power feed, toolbox and stan-dard tools which include:– 1 Pair Work Gloves– T-403 P-Trap Cutter, 3″– T-406 Spear Blade– T-407 Retrieving Auger– T-408 Sawtooth Cutter– T-411 Double Cutter, 2″– T-413 Double Cutter, 3″– T-414-B Double Cutter Blade Only, 4″– T-416-B Double Cutter Blade Only, 6″– T-468 3/4″ Flexible Leader– 4 Spacers for power feed adjustment– 3/16″ Hex Key

• K-7500 Machine with power feed, toolbox, standardtools and C-100 Cable (3/4″ x 100′ Inner-Core)


• K-7500 Machine with power feed, toolbox, standardtools and C-100 Cable HC (3/4″ x 100′ Hollow-Core)

• K-7500 Machine with manual feed, standard tools• K-7500 Machine with manual feed, toolbox, standard

tools and C-100 Cable (3/4″ x 100′ Inner-Core)• K-7500 Machine with manual feed, toolbox, standard

tools and C-100 HC Cable (3/4″ x 100′ Hollow-Core)

For 5/8″ Cable

• K-7500 Machine with power feed, toolbox and stan-dard tools which include:– 1 Pair Work Gloves– T-403 P-Trap Cutter, 3″– T-406 Spear Blade– T-407 Retrieving Auger– T-408 Sawtooth Cutter– T-411 Double Cutter, 2″– T-413 Double Cutter, 3″– T-414-B Double Cutter Blade Only, 4″– T-458 5/8″ Flexible Leader– 3/16″ Hex Key

• Do not operate machine if operator or machine isstanding in water. Will increase the risk of electricalshock.

• Wear safety glasses and rubber soled, non-slipshoes. Use of this safety equipment may prevent se-rious injury.

• Only use the K-7500 to clean drain lines 4″ to 10″ indiameter. Follow instructions on the use of themachine. Other uses or modifying the drain cleaner forother applications may increase the risk of injury.

Description, Specifications andStandard EquipmentDescription

The RIDGID K-7500 Drain Cleaning Machine will cleandrain lines 4″ to 10″ in diameter and up to 250 feet inlength. The 4/10 HP universal motor spins 5/8″ and 3/4″ cableat 200 RPM. When the cable hits the blockage, the motorgears down automatically to deliver greater power and en-hance operator control.

The molded polyethylene drum includes an inner drum thatguards against cable flip over. An integral Ground FaultInterrupter (GFCI) is built into the line cord and a “kick-stand” base is provided for machine stability duringoperation. A pneumatic foot actuator provides ON/OFFcontrol of the motor.

The drum powers a 5/8″ or 3/4″ cable that has a quickchange coupling system for connecting or disconnectingtools. The cable is fed in an out of the drain by a powerfeed assembly at a rate of 0-28 feet/min.

Specifications

Line Capacity................Generally recommended forall drain lines 4″ to 10″ but de-pends on choice of cable.Refer to the following chart forspecifics.

Figure 1

NOTE! 3/4″ Inner-core is not recommended for use throughP-Trap and severe bends in lines smaller than 4″.

Drum Capacity .............125′ of 3/4″ Cable, 150′ of 5/8″ Cable

Cable Size & Type

5/8″ Hollow-Core5/8″ Inner-Core5/8″ Solid Core

3/4″ Hollow-Core3/4″ Inner-Core

Recommended Line Size and ReachLine Size Reach3″ to 4″ 250′3″ to 4″ 250′3″ to 6″ 250′4″ to 6″ 250′4″ to 10″ 250′





Machine AssemblyWARNING

To prevent serious injury, proper assembly of theDrain Cleaner is required. The following proceduresshould be followed:

Instructions for Installing Handle

Raise the stair climber to the upper position by pulling outthe locking pin and lifting the stair climber by the crossmember until the pin locks into the upper position (Figure3). Insert handle through the motor table rail supports andthrough the two holes on rear support (Figure 4). Insert thetwo hairpin cotter fasteners through the holes in the bot-tom of the handle (Figure 5). Adjust handle to desiredheight. Securely tighten the two T-shaped mountingknobs on rear support. Lower the stair climber.

CatalogNo.

92460924659247043647

3273758192

95762957579575295747

92475924804121241697

4742747432

9255592560

4412244117

ModelNo.C-25C-26C-27C-24

C-27HCC-24HC

C-25 IWC-26 IWC-27 IWC-24 IW

C-28C-29C-75C-100

C-75HCC-100HC

T-458T-468

——

Cables and Flexible Leaders

5/8″ (16mm)

5/8″ (16mm)

3/4″ (20mm)

3/4″ (20mm)

Description25′ I.C. Cable (7,6m)50′ I.C. Cable (15,2m)75′ I.C. Cable (22,9m)100′ I.C. Cable (30,5m)

75′ Hollow-Core (22,9m)100′ Hollow-Core (30,5m)

25′ I.W. Cable (7,6m)50′ I.W. Cable (15,2m)75′ I.W. Cable (22,9m)100′ I.W. Cable (30,5m)

25′ I.C. Cable (7,6m)50′ I.C. Cable (15,2m)75′ I.C. Cable (22,9m)100′ I.C. Cable (30,5m)

75′ Hollow-Core (22,9m)100′ Hollow-Core (30,5m)

5/8″ x 2′ Leader3/4″ x 2′ Leader5/8″ Pigtail3/4″ Pigtail

Tools and Replacement Blades — Fits C-24,C-25, C-26, C-27,C-28, C-29, C-75, C-100, C-24HC, C-27HC, C-75HC and C-100HC

CatalogNo.

9248592490

92495

92500

92505

51762

9251092515925209252592530

92535925409254592550

ModelNo.

T-403T-404

T-406

T-407

T-408

T-409

T-411T-412T-413T-414T-416

T-432T-433T-434T-436

Blade(s)

9283592840

92850

—

92890

—

9281592820928259283092855

92860928659287092875

Holder*

9290092900

92915

—

92915

—

9290592905929109291092910

92895928959289592895

Description

P-Trap Cutter, 3″P-Trap Cutter, 31/2″

Spear Blade

Retrieving Auger

Sawtooth Cutter

H-D Bulb Auger

Double Cutter, 2″Double Cutter, 21/2″Double Cutter, 3″Double Cutter, 4″Double Cutter, 6″

3-Blade Cutter, 2″3-Blade Cutter, 3″3-Blade Cutter, 4″3-Blade Cutter, 6″

Replacement

Fastener*Blade

BladeHolder

Coupling*

Figure 2 – Tool Assembly

5/8″ (16mm)

Figure 3 – Raising Stair Climbers

* Identifies componentsincluded with holder

Ridge Tool Company6

Instructions for Installing Power Feed

Loosen the knob on the top bearing housing and slide thepower feed onto the pigtail. Secure the power feed by tight-ening the T-shaped mounting knobs.

Instructions for Installing Cable

Do not remove bands or staples from cableshipping carton. Cable is under tension and will whip,causing injury.

Retrieve end of cable through the center hole of carton andremove enough cable to connect with drum pigtail. Connectto pigtail by sliding cable couplings together and turningscrewdriver slot in coupler 180º. Couplings are in unlockedposition when hash to is on opposite side of screwdriver slotas shown in Figure 6. Feed cable into drum.

Figure 6 – Disconnecting/Connecting Cable

Machine InspectionWARNING

To prevent serious injury, inspect your DrainCleaning Machine. The following inspection proce-dures should be performed before each use.

1. Make sure the Drain Cleaning Machine is unpluggedand the directional switch is set to the OFF position.

2. Make sure the foot switch is present and attached tothe Drain Cleaning Machine (Figure 10). Do not op-erate the Drain Cleaning Machine without a foot switch.

3. Check the belt guard to ensure that it avoids contactwith the drum when drum is rotating. Reposition guardif necessary and tighten bolts. Gap between beltguard and drum should not exceed 1/2″.

4. Inspect the power cord, Ground Fault Circuit Inter-rupter (GFCI) and plug for damage. If the plug hasbeen modified, is missing the grounding prong drumor if the cord is damaged, do not use the DrainCleaning Machine until the cord has been replaced.


Figure 4 – InsertingHandle

Figure 5 – Secure Handleswith CotterPins. TightenTwo (2) “T”Shaped Knobs

QUICK-CONNECT CABLE & TOOLSRotate pin one-half turn in either direction to

quickly add cable or tools.

Hash Mark(Locked position)Screwdriver Slot

Hash Mark(Un-locked position) Screwdriver Slot

LOCKEDHash mark CLOSED aligned with L stamped on coupling.

UNLOCKEDHash mark OPEN aligned opposite L stamped on coupling.

Coupling features stainless steel pin and spring: eliminates need for punches, stands, or expansion pins.

CAUTION


5. Check the rear support bolt that fastens the drumassembly to the machine frame is securely tightened(Figure 7).

Unsecured drum assembly could resultin serious injury and machine damage.

Figure 7 – Check Bolt to Ensure Tightness

6. Inspect the Drain Cleaning Machine for any broken,missing, misaligned or binding parts as well as anyother conditions which may affect the safe and normaloperation of the machine. If any of these conditions arepresent, do not use the Drain Cleaning Machine untilany problem has been repaired.

7. Lubricate the Drain Cleaning Machine, if necessary,according to the Maintenance Instructions.

8. Use tools and accessories that are designed for yourdrain cleaner and meet the needs of your application.The correct tools and accessories will allow you to dothe job successfully and safely. Accessories suitablefor use with other equipment may be hazardous whenused with this drain cleaner.

9. Clean any oil, grease or dirt from all equipment han-dles and controls. This reduces the risk of injury due toa tool or control slipping from your grip.

10. Inspect the cutting edges of your tools. If necessary,have them sharpened or replaced prior to using theDrain Cleaning Machine. Dull or damaged cuttingtools can lead to binding and cable breakage.

11. Inspect cables and couplings for wear and damage.Cables should be replaced when they become se-verely worn or corroded. A worn cable can be identifiedwhen the outside coils become flat.

Worn or damaged cables can break caus-ing serious injury.

Machine Set-UpWARNING

To prevent serious injury, proper set-up of the ma-chine and work area is required. The followingprocedures should be followed to set-up the ma-chine:

1. Check work area for:• Adequate lighting• Grounded electrical outlet• Clear path to the electrical outlet that does not

contain any sources of heat or oil, sharp edges ormoving parts that may damage electrical cord.

• Dry place for machine and operator. Do not placethe machine in water.

• Flammable liquids, vapors or dust that may ignite.

2. Position the Drain Cleaning Machine within 3′ ofsewer inlet.

If sewer inlet is greater than 3′ from thefront of the machine, the cable will have a greater tendencyto twist or kink. Use a front guide hose or properly supportexposed cable.

3. Set the spring loaded kickstand bar by tilting the ma-chine forward to allow the bar to pivot behind thetires (Figure 8). Make sure the machine rests firmly onthe bar before continuing. The tires should not contactthe ground.

Figure 8 – Setting Kickstand Bar


WARNING

WARNING

WARNING

8

Figure 9 – Releasing Kickstand Bar

To prevent tipping during use, machineshould rest firmly on the kickstand.

4. Position the air foot switch pedal for easy operatoraccessibility. Machine is designed for one person op-eration (Figure 10).

5. Make sure FOR/OFF/REV switch is in the OFF po-sition.

6. Select and install the proper tool/cutter to the end ofthe cable. To connect, slide tool and cable togetherand turn screwdriver slot in coupler 180°. Coupling isin locked position when hash mark is on oppositeside of screwdriver slot as shown (Figure 6).

NOTE! 3/4″ inner core cables are not recommended foruse through P- traps and sewer bends in linessmaller than 4″. For larger lines, flexible leadersshould be used to negotiate traps. Failure touse flexible leaders may result in cable damage.

7. Plug the Drain Cleaning Machine into the electricaloutlet, making sure to position the power cord alongthe clear path selected earlier. If the power cord doesnot reach the outlet, use an extension cord in goodcondition.

To avoid electric shock and electrical fires,never use an extension cord that is damaged or doesnot meet the following requirements:

• The cord has a three-prong plug similar to shown inElectrical Safety section.

• The cord is rated as “W” or “W-A” if being used outdoors.

• The cord has sufficient wire thickness (16 AWG below50’/14 AWG 50′ - 100′). If the wire thickness is toosmall, the cord may overheat, melting the cord’s insu-lation or causing nearby objects to ignite.

To reduce risk of electrical shock, keep allelectrical connections dry and off the ground. Do nottouch plug with wet hands. Test the Ground Fault CircuitInterrupter (GFCI) provided with the electric cord to insureit is operating correctly. When test button is pushed in, theindicator light should go off. Reactivate by pushing thereset button in. If indicator light goes on, the machine isready to use. If the GFCI does not function correctly, donot use the machine.

Operating InstructionsWARNING

Wear gloves provided with machine. Never grasp arotating cable with a rag or loose fitting cloth glovethat may become wrapped around the cable causingserious injury.

Always wear eye protection to protect your eyesagainst dirt and other foreign objects. Wear rub-ber soled, non-slip shoes.

Be very careful when cleaning drains where clean-ing compounds have been used. Avoid directcontact to the skin and especially the eyes and fa-cial area as serious burns can result.

Always assume the correct operating pos-ture in order to maintain proper balance (Figure 10).Should an unexpected situation arise, this posture providesyou with the opportunity to safely keep control of the ma-chine and cable.

• Be sure you can quickly remove your foot from thefoot switch.

• Hand must be on the cable to control its twistingaction when it hits an obstruction.

• Keep hands away from rotating guide tube anddrum. Do not reach into drum unless machine isunplugged.


WARNING

WARNING

WARNING

WARNING



tating fully reverse feed lever (move handle in thesame direction of the drum rotation) to back the cutteraway and to relieve the load. Gradually feed thecable into the obstruction, allowing cutter to advanceslowly. Occasionally move power feed lever to neutralto allow cutter to work through the obstruction. Repeatthis process until the obstruction is clear. Remember,make sure the cutters are rotating at all times andnever force the cable.

TIP: If cable continues to get hung up in blockage, dis-continue use of the auto feed and work cable byhand.

7. Once flow is established, use running water to washdebris and roots down the drain while finishing the job.

WARNINGDo not allow tension to build up in the cable. Thiswill happen if the cutting tool hits a snag and stopsturning, but the motor and its drum continue to ro-tate. Torque builds until the cable suddenly twists,potentially wrapping around your hand or arm. Thiscan happen quickly without warning, so proceedslowly and carefully as you feed the cable into thedrain. If tool gets hung up in an obstruction, refer toReverse Operating Instructions in the “SpecialProcedures Section”.

Figure 11 – Feed Lever Operation

8. Several passes at thoroughly blocked drain lines arerecommended. Start with a grease cutter or 2″ bladeor a blade typically 2″ smaller than the drain size. Afterestablishing drain flow, increase cutter size to thor-oughly clean the lines.

TIP: Know approximately where you are going. Over-running cable into city sewers septic tanks can causecable damage and retrieval problems.

NOTE! Additional cable may be added if required. Referto Special Applications Procedure section.


Figure 10 – Proper Operating Position

Using Power Feed Machine

1. Loosen the feed knob to ensure power feed is not en-gaged. Manually pull a sufficient length of cable out ofthe drum and manually push the tool and cable intothe sewer inlet.

2. Move FOR/OFF/REV switch into FOR (forward) po-sition. Do not step on the air foot switch pedal at thistime.

3. To use auto feed, turn feed knob down until top bear-ing makes contact with the cable; then turn one fulladditional turn. Do not over-tighten.

WARNINGBefore starting machine, operator’s gloved handmust be on the cable.

4. Exert sufficient downward pressure on cable to keepit in sewer line while depressing air foot switch pedalto start cable rotating.

5. Move the feed lever in the opposite direction of the ro-tating drum to advance the cable (Figure 11). The rateat which the cable is fed (0 – 28’ per minute) into thesewer is controlled by the position of the feed leveraway from neutral (vertical) position. The further fromvertical, the faster the feed rate. Always keep onehand on the cable to feel tension.

6. Continue to feed the cable into the line until resistanceor obstruction is encountered. This condition will gen-erally become apparent to the operator as the motorwill “lug” down and/or the cable will have a tendencyto twist sideways in the operator’s hands.

If the cable shows signs that the cutter has stopped ro-

Ridge Tool Company10

9. To retrieve the cable from the sewer line, move thepower feed handle in the same direction of the drumrotation.

Do not put the machine in reverse. The ma-chine should be kept running during the retrieval processfor thorough cleaning.

NOTE! A continuous flush of water should be used toclean the cable and tool as they are retrieved.

10. When the tool is inside the sewer inlet, release the airfoot switch pedal and allow the machine to come to acomplete stop.

Never retract tool from sewer inlet whilecable is rotating. Tool can whip causing serious injury.

11. Turn FOR/OFF/REV switch to OFF position and re-move cord from power source.

12. Loosen the feed knob and pull the remaining cableand tool from the sewer. Hand feed the cable into themachine.

13. Disengage the spring loaded kickstand bar by tiltingthe machine forward and forcing the bar forward of thetires (Figure 9).

Using Manual Feed Machine

1. Manually pull a sufficient length of cable out of thedrum to form a slight loop and push the tool andcable into the sewer inlet. Apply downward pressurewith both hands on cable.

NOTE! Do not force cable. Allow it to feed itself intothe drain.

2. Move FOR/OFF/REV switch into FOR (forward) po-sition.

WARNINGBefore starting machine, operator’s gloved handmust be on the cable.

3. Exert sufficient downward pressure on cable to keepit in sewer line while depressing air foot switch pedalto start cable rotating.

4. Pull cable out of drum and allow cable to feed itselfinto the line. Always keep hand on the cable to feel thetension.

5. Continue to feed the cable into the line until resistanceor obstruction is encountered. The condition will gen-erally become apparent to the operator as the motorwill “lug” down and/or the cable will have a tendencyto twist sideways in the operator’s hands.

If the cable shows signs that the cutter has stopped ro-tating, pull back sharply on the cable to free the cutter

and relieve the load on the cable. Slowly advancethe cable back into the obstruction. Repeat this processuntil the obstruction is clear. Remember, make sure thecutter is rotating at all times and never force the cable.

6. Once flow is established, use running water to washdebris and roots down the drain while finishing the job.

WARNINGDo not allow tension to build up in the cable. Thiswill happen if the cutting tool hits a snag and stopsturning, but the motor and its drum continue to ro-tate. Torque builds until the cable suddenly twists,potentially wrapping around your hand or arm. Thiscan happen quickly without warning, so proceedslowly and carefully as you feed the cable into thedrain. If tool gets hung up in an obstruction, refer toReverse Operating Instructions in the “SpecialProcedures Section”.

7. Several passes at thoroughly blocked drain lines arerecommended. Start with a grease cutter or 2″ blade,or a blade typically 2″ smaller than the drain size.After establishing drain flow, increase cutter size tothoroughly clean the lines.

TIP: Know approximately where you are going. Over-running cable into city sewers or septic tanks cancause cable damage and retrieval problems.

NOTE! Additional cable may be added if required. Referto Special Applications Procedure section.

Do not put the machine in reverse. The ma-chine should be kept running during the retrieval processfor thorough cleaning.

NOTE! A continuous flush of water should be used toclean the cable and tool as they are retrieved.

8. When the tool is just inside the sewer inlet, release theair foot switch pedal and allow the machine to come toa complete stop.

Never retract tool from sewer inlet whilecable is rotating. Tool can whip causing serious injury.

9. Turn FOR/OFF/REV switch to OFF position and re-move cord from power source.

10. Pull the remaining cable and tool from the sewer andfeed into the machine.

11. Disengage the spring loaded kickstand bar by tiltingthe machine forward, forcing the bar forward of thetires (Figure 9).

Special ProceduresMain Sewer Or Septic Tank Overrun

It is very important to know the approximate distance from


WARNING

CAUTION

CAUTION

WARNING


Draining The Drum

Water can be drained from the drum by removing thescrew plug located in the rear of the drum (Figure 13) andresting the machine on its back. Be sure the screw drainplug is replaced before transporting the machine.

Figure 13 – Drum Drain Hole

Power Feed Adjustment Procedure

1. The K-7500 Power Feed comes from the factory set-up to run the cable size you selected for your machine(5/8″ or 3/4″). If the operator wishes to change cable size,adjust the power feed by following Steps 2-9.

2. Make sure FOR/OFF/REV switch is in the OFF posi-tion and machine is unplugged from power source.

3. Remove tool from cable. Loosen the knob on the topbearing housing until the cable can slide freely inand out of the drum.

4. Loosen both T-shaped mounting knobs until the powerfeed can slide off the machine.

NOTE! It is not necessary to completely remove themounting knobs from their base (Figure 14).

Figure 14 – Removing Power Feed


inlet to main sewer or septic tank. Over-running cable toofar into main sewer or septic tank can allow cables toknot-up and prevent their return through small lines.

Reverse Operation

Running machine in reverse will cause premature failureof cable. Use reverse only to free a tool caught in an ob-struction. If this should occur, immediately remove footfrom air foot switch pedal and allow machine to come to afull and complete stop. Place FOR/OFF/REV switch toREV (reverse) position. If machine has automatic feed,loosen feed knob. Grasp cable with gloved hands and pullwhile jogging air foot switch pedal. When tool is dislodgedand drum has stopped rotating, place FOR/OFF/REVswitch in FOR (forward) position and follow normal oper-ating procedure.

Never operate this machine in REV (re-verse) for any other purpose. Operating in reverse candamage a cable and cause serious injury.

Loading The Machine On Vehicle

The stair climber can be raised from the lower position(used to move the machine up and down stairs) to theupper position (used to load the machine onto truck beds).To place the stair climber in the upper position, raise thestir climber by pulling out the locking pin and lifting thecross member until the pin locks in the upper position. Tipthe machine backwards and rest the stair climbers onthe truck bed. Lift up on the front of the machine andslide it onto the truck (Figure 12).

Use proper lifting technique – lift with yourlegs, not your back!!

NOTE! Take care not to damage electrical cord or airfoot switch hose.

Figure 12 – Lifting Unit Onto Vehicle

WARNING

WARNING


Figure 17 – Insert 2 Spacers for 5/8″ Cable

8. Insert bearing holder into housing and replace actu-ator pin. Pivot the housing back into place makingsure the actuator pin engages the slot on the actua-tor plate. Insert/tighten bolts.

9. Repeat Steps 5-8 on the other lower bearing holderand housing.

10. Grease all bearing housings via the grease fittings.

NOTE! When running 5/8″ cable, it is best to use a 5/8″pigtail to avoid premature failure of the powerfeed bearings. To change a pigtail, see PigtailRemoval and Installation section.

Operating Machine in Reclined Position

The machine can be operated in the reclined position toaccess overhead waste lines. The K-7500 provides twoangles of operation. The lowest angle occurs when themachine rests on its handles. A more moderate angle ofoperation occurs when the machine rests on the stairclimber in the upright position.

If sewer inlet is greater than 3’ from thefront of the machine, the cable will have a greater ten-dency to twist or kink. Use a front guide hose or properlysupport exposed cable.

Drum Removal & Installation Procedure

WARNINGMake sure FOR/OFF/REV switch is in the OFF posi-tion and machine is unplugged from power source.

Removal

1. Set kickstand in the operating position to keep the ma-chine from moving.

2. Loosen the top power feed knob to make sure the topbearing is not in contact with the cable and removethe cutter.

12

5. Put the power feed handle in the vertical position.Remove the top bolt on one of the lower bearingholder housings (Figure 15).

Figure 15 – Removing/Loosening Bolts

Loosen slightly the lower bolt. Pivot the bearingholder housing downward until the actuator pin isfree of the actuator plate (Figure 16).

NOTE! The housing will pivot easier if the bolts on thetop bearing holder housing are loosened slightly.

6. Unscrew the actuator pin and then remove the bear-ing holder from the housing.

7A. If changing from 3/4″ to 5/8″ cable: Insert two spacerwashers into the bottom of the housing (Figure 17).

7B. If changing from 5/8″ to 3/4″ cable: Remove the twospacer washers in the bottom of the housing.

Figure 16 – Pivot Bearing Housing Downward

Actuator pin

Loosen bolt

Loosen bolt

Remove bolt

WARNING



5. At the back of the machine, remove the rear supportbolt located in the center of the rear support. (This fas-tens the drum assembly to the machine frame)(Figure 19).

6. The assembly can now be removed by grasping thedrum via the holes on the drum front and sliding theassembly off the mounting boss.

NOTE! If the drum sticks on the mounting boss, tilt themachine forward until the drum slides off themounting boss.

Installation

1. Set the kickstand to keep machine from moving.

2. Grasp the drum assembly via the holes on the drumfront and lift the assembly onto the mounting boss lo-cated on the middle front of the frame.

Use proper lifting technique – lift withyour legs, not your back!

An alternate method is to lift the drum assembly onto theframe with the casting hole near the mounting boss.Lower the machine onto its back. Grasp the drum via theholes and lift onto the mounting boss. Gently raise ma-chine and follow Step 3 below (Figure 20).

3. Reverse Steps 4-6 in the Removal Section. Makesure the rear support bolt is securely tightened beforebeginning operation.

Installing Extra Drum (Additional Cable)

The operator may wish to carry a second drum (minus theguide tube and inner drum) with cable for runs greaterthan 100’. For this application, the guide tube and innerdrum can be removed from the original drum and in-stalled on the extra drum.

1. Set the kickstand to keep machine from moving.

Figure 20 – Lifting Drum Assembly Onto Frame

2. Disconnect the original cable from the pigtail section.Secure the cable to keep it from falling into the drain.

3. Loosen the two T-shaped mounting knobs located onthe drum side of the power feed assembly. It is notnecessary to remove the knobs, just loosen enoughto allow the power feed assembly to slide off thefront support. Slide the assembly off the cable also.

4. Push down on motor table handle to release belttension and slip the belt off the drum (Figure 18).

Figure 18 – Release Belt Tension

Figure 19 – Removing Rear Support Bolt


WARNING


Pigtail Removal And Installation1. Set the kickstand.

2. Remove all cable from the drum except the pigtail.

3. Remove the power feed assembly, guide tube, innerdrum and main drum as described in Steps 3-9 inInstalling Extra Drum (Additional Cable) section.

4. Remove the bolt anchoring the pigtail. It is located onthe back of the drum (Figure 23).

Figure 23 – Removing Pigtail Anchoring Bolt

5. Remove the pigtail from drum and insert new pigtailinto the drum.

6. Align hole in pigtail fastener with the hole in the backof the drum. Insert bolt, washers and nut and tightensecurely. Push the remainder of the pigtail into drum(Figure 24).

Figure 24 – Anchoring of Pigtail in Drum

7. Install drum onto the mounting boss and insert rearsupport bolt. Securely tighten bolt.

8. Grasp the end of pigtail and reverse Steps 3-7 inInstalling Extra Drum (Additional Cable) section.Tighten all fasteners, especially the set screw on theknob on the center shaft.

3. Remove the power feed assembly as described inSteps 3-4 of Drum Assembly Removal section.

4. Remove the set screw on the knob on the centershaft. Unscrew knob and pull off shaft (Figure 21).

Figure 21 – Removing Knob From Center Shaft

5. Pull the guide tube assembly off the shaft and off thecable (Figure 22).

6. Remove the inner drum.

7. Push down on motor table handle to release belttension and slip belt off drum.

8. At the back of the machine, remove the rear supportbolt.

9. Remove the drum from the mounting boss.

10. Install the extra drum with cable by lifting it onto themounting boss.

Figure 22 – Removing Guide Tube Assembly

11. Reverse Steps 3-8. Be sure to place the cablethrough the inner drum before completing Step 6.Make sure the rear support bolt and the set screw onthe knob on the center shaft (front of machine) are se-curely tightened before operation.

12. Attach the cable from the extra drum to the cable inthe drain.

Ridge Tool Company14


Proper Tool Selection

A good rule of thumb is to make the first pass with either aspear cutter or blade cutter that is 2″ smaller than thedrain size. For additional passes, larger tools may beused. However, tools should always be at least 1″ smallerthan the drain size.

The style of the tool is determined by the nature of the joband is left to the discretion of the operator.

Flexible leaders should be used to negotiate bends andtraps in lines.

AccessoriesOnly the following RIDGID products have

been designed to function with the K-7500 Drain CleaningMachine. Other accessories suitable for use with othertools may become hazardous when used on the K-7500.To prevent serious injury, use only the accessories listedbelow.

Maintenance InstructionsWARNING

Make sure machine is unplugged from power sourcebefore performing maintenance or making any ad-justment.

Autofeed AssemblyProper cleaning and lubrication of the autofeed is advisedfor long, trouble-free operation. After each use, hose out aut-ofeed with water and grease bearings.

LubricationGrease all exposed, moving and rotating parts as required.

CablesDrain drum after every use. Flush drum periodically, re-move sediment that can corrode cable.

Cables should be thoroughly flushed with water to preventdamaging effects of drain cleaning compounds. Periodi-cally lubricate cables and couplings with RIDGID CableRust Inhibitor.

When not in use, store cables indoors to prevent deterio-ration by the elements.

Cables should be replaced when the become severely cor-roded or worn. A worn cable can be identified whenoutside coils of cable become flat.

Machine StorageMotor-driven equipment must be kept in-

doors or well covered in rainy weather. Store the machinein a locked area that is out of reach of children and peopleunfamiliar with drain cleaners. This machine can cause se-rious injury in the hands of untrained users.

Service and RepairWARNING

Other service and repair work on this Drain Cleaner mustbe performed only by qualified repair personnel. DrainCleaner should be taken to a RIDGID Authorized ServiceCenter or returned to the factory. When servicing thismachine, only identical replacement parts should be used.Failure to follow these steps may create a risk of electricalshock or other serious injury.


WARNING

Description

Drum Assembly w/ 3/4″ Pigtail

Drum Assembly w/ 5/8″ Pigtail

Drum Only

Power Feed Assembly5/8″ Repair Splicer5/8″ Male Coupling5/8″ Female Coupling3/4″ Repair Splicer3/4″ Male Coupling3/4″ Female Coupling

Pair of Work Gloves

Tool Box

Front Guide Hose Assembly

Cable Rust Inhibitor, 1 Qt.

Cable Rust Inhibitor, 1 Gal.

Catalog No.

60042

61107

60047

60032

314879280592810

314929288092885

41937

59360

49032

59982

59987

WARNING


16

GREEN

BLACK

YELLOW

WHITE

BLACK

RED

BLUE

AIR SWITCH

F/O/R SWITCH

Cable is being forced.

Cable used is incorrect pipe diameter.

Motor switched to reverse.

Cable exposed to acid.

Cable worn out.

Hole in pedal or hose.

Hole in diaphragm switch.

Faulty reverse switch.

Damaged power cord.

Short circuit in motor.

Faulty Ground Fault Circuit Interrupter.

Autofeed is not routinely cleaned and fills with de-bris.

Autofeed is not greased enough.

Kickstand not engaged.

Do Not Force Cable! Let the cutter do the work.

Use 5/8″ cables in 3″ to 6″ lines and use 3/4″ cablesin 4″ to 10″ lines. Use Trap Leader.

Use REVERSE only if cable gets caught in pipe.

Clean and oil cables routinely.

If cable is worn, replace it.

Replace damaged component.

If no problem found with pedal or hose, replacediaphragm switch.

Replace switch.

Replace cord set.

Take motor to authorized service center.

Replace cord set that includes a Ground FaultCircuit Interrupter.

Disassemble autofeed and clean monthly.

Apply grease to fittings weekly.

Engage kickstand.

Set on level surface.

PROBLEM CAUSE CORRECTION

Cable kinking or breaking.

Drum stops while pedalis depressed. Restartswhen pedal is re-pressed.

Drum turns in one direc-tion but not the other.

Ground fault Interruptertrips when machine isplugged in or when footpedal is depressed.

Autofeed does not workproperly.

Machine wobbles ormoves when cleaning adrain.

Chart 1. Troubleshooting

Wiring Diagram


Documents

K-7500 Drain Cleaning Machine - Test Equipment … Drain Cleaning Machine 2 Ridge Tool Company General Safety Information WARNING! Read and understand all instructions. Failure to