Warnings

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INTRODUCTION

BEFORE YOU USE YOUR OWNER'S MANUAL, PLEASE READ THIS INTRODUCTION ALL

THE WAY THROUGH.

WHEN THE MACHINE IS DELIVERED:

Check the carton carefully for signs of damage and rough handling. Remove the machine from the carton.

If the machine is damaged, notify the carrier immediately and request an inspection. Be sure to keep the carton, packing list and carrier's receipt until the inspector has verified your claim.

Kent Investment's liability ceases when the shipment is picked up by the carrier, but our customer service staff will be glad to furnish any information needed in connection with the claim and will expedite repair of the machine.

BEFORE OPERATING THE MACHINE

Read the manual carefully before operating Model C-4. The manual has important information for the use and safe operation of the machine. Keep this manual handy at all times. Model C-4 will assure years of satisfactory service if operated and maintained according to recommendations in this manual. If additional technical information is needed, please contact Kent Investment Corporation at 870.994.3535.

All information and specifications printed in this manual and parts list are current at the time of printing; however, because of Kent Investment's policy of continual product improvement, we reserve the right to make changes at any time without notice.

WARRANTY:

See page 5 of this manual for limited warranty.

THIS MACHINE IS FOR COMMERCIAL USE.

IMPORTANT SAFETY INSTRUCTIONS

When using an electrical appliance, basic precautions should always be followed, including the following:

READ ALL INSTRUCTIONS BEFORE USING MODEL C-4.

GENERAL INSTRUCTIONS

This floor finishing machine shall be grounded while in use to protect the operator from electric shock. The machine is provided with a three-conductor cord and a three-contact grounding type attachment plug to fit the proper grounding type receptacle. The green (or green and yellow) conductor in the cord is the grounding wire. NEVER connect this wire to other than the grounding pin of the attachment plug.

1

WARNING - TO REDUCE THE RISK OF FIRE, ELECTRICAL SHOCK, PERSONAL INJURY OR

DAMAGE TO MODEL C-4:

4. Fill tank with machine bucket only! Machine must be emptied after 3 1/2 gallons of water and solution have been used.

6. Use only as described in this manual. Use only Kent Investment Corp. recommended attachments and chemicals.

7. DO NOT use with damaged cord or plug. If appliance is not working as it should, has been dropped, damaged, left outdoors, or immersed in water, contact Kent Investment Corporation service department for service instructions.

8. DO NOT pull or carry by cord, use cord as a handle, close door on a cord, or pull cord around sharp edges or corners. DO NOT run equipment over cord. Keep cord away from heated surfaces.

11. DO NOT put any object into openings. DO NOT use with any openings blocked; keep free of dust, lint, hair, and anything that may reduce airflow.

17. NEVER vacuum solvents, gasoline or other hazardous liquid or solid material or use in areas where they may be present.

GROUNDING INSTRUCTIONS

This machine is for use on a nominal 120-volt circuit and has a grounding plug that resembles the plug illustrated in sketch (A) (RIGHT). Make sure that the machine is connected to an outlet having the same configuration as the plug. No adapter should be used with this machine.

CAUTION!

To prevent electrical shock, do not use this polarized AC plug with an extension cord, receptacle or other outlet unless the blades can be fully inserted to prevent blade exposure.

2

CLEANING DIRECTIONS

Preparing Carpet & Upholstery

1) Vacuum carpet or upholstery with your home vacuum cleaner. This machine is not a vacuum cleaner.

NOTE: We recommend vacuuming carpet thoroughly, making four passes with a CRI approved vacuum cleaner.

2) Pre-treat general spots with 7 IN 1 Carpet Care. Pre-treat pet & acid based spots with 7 IN 1 Spot & Odor Pet Formula.

Pre-treat heavily soiled areas of carpet, hallways, doorways and around furniture with 7 IN 1 Hi-Traffic Pre-Treatment.

Note: Read and follow all 7 IN 1 label directions prior to use.

1) Pull “T” Handle on machine Handle.

2) Raise machine Handle to desired

height.

1) Pull down Bucket Handle.

2) Lift the Lid.

3) Remove the Bucket.

1) Read and follow all 7 IN 1 Carpet Care directions. Mix 7 IN 1 with water in Bucket according to Quick Dry directions.

Note: Do not fill Bucket above top fill line.

Warning: Do not use bleach or dye in this machine.

User will be liable for all damages.

1) Important: Pour contents of

Bucket into machine Solution Tank.

1) Return Bucket to Solution Tank.

2) Close Lid.

3) Snap Bucket Handle into place.

1) Plug in machine to a grounded outlet. See

Grounding Instructions.

1)Tilt the machine back and move into the starting position.

2) Turn ON the Suction Switch.

Note: Hand Tool Switch must be OFF.

3) Pull the Spray/Brush Trigger and pull the machine backwards at a slow steady pace, about

1 foot per 2 seconds. Clean in approximately 5 foot strokes.

Overlap strokes by 2 inches, releasing the Trigger 6 inches before ending each stroke.

Keep the Suction Nozzle in firm contact with the carpet.

Note: For best results, clean heavily soiled areas twice at right angles.

3

3

1) Turn all switches OFF.

ON

HAND TOOL

NOTE: Hand

Cleaning.

Tool

NOTE: Rem ove

TURN OFF ALL SWIT t

ON

SUCTION

OFF

1) Dirty water passes through the right Sight Tube while cleaning.

When dirty water stops passing through the Sight Tube while cleaning, the machine is empty.

Empty dirty water from and rinse

Bucket. Refill the machine.

2) If foam or liquid appears in the left Sight Tube, empty the dirty water from the Bucket without refilling the machine.

3) When finished cleaning, empty and rinse Bucket. Use the clear

Drain Tube at the back of the unit to empty unused solution from the Solution Tank.

Note: Use the Hand Tool for cleaning stairs. See Cleaning

Upholstery for Hand Tool use.

ON OFF

HAND TOOL

NOTE: Hand Tool

OFF During Carpet

NOTE: Remove

Breaker.

Cleaning.

TURN OFF ALL SWITCHES

BEFORE PLUGGING IN MACHINE

ON

BRUSH

TRIGGER

OFF

CLEANING DIRECTIONS

1) Turn all Switches OFF.

2) Disconnect the machine Solution

Hose. Pull down on the middle of the brass Coupler. The hose will release.

While holding down the Coupler, insert the Hand Tool Kit Solution

Hose. Release Coupler. Pull on the Solution hose to insure it is secured.

3) Disconnect the grey and black

Vacuum Cuffs at the back of the machine. Connect the grey

Hand Tool Kit Cuff to the grey machine Cuff.

WARNING: Do Not Use To Clean Haitian Cotton!

1) Read 7 IN 1 Carpet Care directions.

See: Test Colorfastness and

Upholstery Cleaning Directions.

Mix 7 IN 1 with water in Bucket according to directions.

Note: For upholstery cleaning, mix 1.5

gallons of cleaner at a time.

1) Important: Pour contents of Bucket into machine Solution Tank.

1) See Preparing Carpet & Upholstery.

2) Turn ON the Suction and Hand Tool Switches.

3) Squeeze the Hand Tool Trigger as you pull up or back with overlapping even strokes.

Cleaning Stairs

1. Use the Hand Tool to clean stairs. (See Cleaning Upholstery to hook up hand tool.)

2. Clean the upstairs rooms first, then the stairs.

IMPORTANT: When cleaning the upper stairs, turn machine sideways so wheels are NOT facing forward, toward stairs.

Be careful bringing the machine down wet stairs. Make sure to empty the Bucket and Solution Tank using the Drain Hose.

3. Turn on Suction and Hand Tool Switches.

4. Place Hand Tool Suction Nozzle on carpet and squeeze Trigger while pulling backwards.

Cleaning Machine

1) Wipe hair and debris from the Lid.

2) Drain unused solution from Solution Tank.

3) Dispose of solution and rinse Bucket thoroughly.

4) Clean out the Vac Nozzle with a hanger.

5) Remove fibers and hair from the Brush.

6) Wipe Brush Chamber clean with towel.

7) Wipe off the exterior of the machine with a damp towel.

Lid

Bucket

Handle

Spray/Brush

Trigger Switch

Suction Switch

Handle Adjust

Sight

Tubes

Handle

Bucket

Hoses

Solution

Tank Drain Hose

Suction Nozzle

/ Brush

4

4

MACHINE OPERATION TROUBLESHOOTING

LOSS OF ELECTRICAL POWER

1) Check if the Switches are in the ON position.

2) Check to see if Electric Cord is plugged in.

3) Check if the Brush Circuit Breaker has tripped. Clear brush of debris until brush turns freely. Then reset the breaker.

4) Check circuit breakers or fuse box in your building.

5) Check if the outlet is wired to a light switch, or try using a different outlet.

6) If Machine keeps blowing breakers or fuses every time you turn it on, have a qualified repair center check the equipment.

LOSS OF VACUUM / LITTLE OR NO SUCTION

1) Check if hose cuffs on back of the machine are connected. (See illustration on page 4.)

2) Be sure the suction switch is on. If you don’t hear any sound from the vacuum, have a qualified repair center check the equipment.

3) Be sure the lid is firmly seated in the bucket and the bucket handle is snapped in place.

4) As you make a backwards cleaning stroke, be sure the suction lips are down firmly on the carpet.

5) Brush off any accumulated lint or debris on the vacuum filter screen located on the bottom of the lid.

6) The vacuum nozzle may be stopped up with lint. Turn the machine OFF. Unplug and empty the machine of liquid.

Tilt the machine back and remove lint with a bent hanger.

LACK OF WATER PRESSURE

1) Make sure the cleaning solution was poured from the removable bucket into the solution tank.

2) Make sure to pull the spray/brush trigger switch while carpet cleaning; or the hand tool switch is ON when using the hand tool.

3) Check to see if the solution hose is connected at the back of the machine.

4) Make sure you are not out of cleaning solution.

NO BRUSH MOVEMENT

1) Pull the spray/brush trigger switch. If there is no movement, release trigger and check to see if the brush spins freely. Remove any lint and string caught on the brush. Reset the circuit breaker located on the Handle. DO NOT attempt to reset circuit breaker if it trips a second time. Have a qualified repair center check/repair the equipment.

2) If the motor runs and the brush will not spin (but it can be turned freely by hand), the belt needs to be replaced. See

C-4 repair instructions for further details.

KENT INVESTMENT CORPORATION LIMITED WARRANTY

Kent Investment Corporation (the "Company") warrants each new machine against defects in material and workmanship under normal use and service for a period of six months from date of purchase. Our obligation under this warranty is limited to the making good at our factory or authorized distributor service station any part or parts thereof, except motors and pumps (see exception below), which within the warranty period are returned to our factory or authorized distributor service station, transportation prepaid, and which are determined by us to have been defective in workmanship or material. All parts being returned must be accompanied by date of purchase, name of party purchased from, invoice number and serial number of machine. Purchaser's exclusive remedy against defects in workmanship or material under this warranty shall be the repair or replacement of the returned part or parts as set forth above.

EXCEPTION: This warranty does not apply to motors or pumps used on Kent Investment machines. The motors and pumps carry a warranty of their own and are covered by the manufacturer of said motors and pumps.

This limited warranty does not cover any product or part(s), damage or defects resulting from misuse, neglect, accident, normal expected wear, improper installation or operation contrary to factory recommendations or unapproved, unauthorized repairs or alterations. Kent Investment Corporation reserves the right to inspect and make the final decisions on any warranty claims that may be questionable.

Purchaser shall have no claim against the company in connection with this warranty, the company's machines, or otherwise, for consequential or incidental damages, including without limitation damages for loss of use, lost profits, or delayed delivery or expenses related to the receipt, transportation, or care of a new machine. In no event shall the company's liability with respect to each machine covered under this warranty exceed the price paid by purchaser for such machine.

This limited warranty is the exclusive warranty of Kent Investment Corporation and is in lieu of any other warranty express or implied, including, but not limited to, warranties of merchantability and fitness for a particular purpose.

5

RETURNING THE C-4 TO RENTABLE CONDITION AFTER EACH USE.

1) Examine the power cord, plug and switches for damage or wear. Wipe down power cord. (Note: Damaged or worn electrical components must be replaced.)

2) Turn on the vacuum motor, let it run to blow out any trapped water. (Note: Unusual motor noise indicates motor needs replacing.)

3) Pull spray/brush switch to activate pump and brush. Make sure both are working properly. (Note: Pump should not be run dry more than a few seconds, it becomes loud when dry.)

4) Drain all unused solution from the solution tank by lowering the drain hose.

5) Remove bucket and spray it inside and out with cleaning disinfectant. Let sit.

6) Wipe debris from lid filter screen. (Located on the underside of lid.)

7) Clean solution tank filter bag. Pull the tab at the bottom of the bag to turn it inside-out and wipe away debris.

8) Spray the outside of the machine with cleaning disinfectant. (Note: Do not spray air vents on the back door, control panel on the handle or any electrical components.)

9) Tilt machine forward. Remove hair and debris from brush. Clean vacuum nozzle with lint hook. Ensure wheels are clean.

10) Turn the brush by hand to ensure it turns freely. (Note: If brush does not turn freely, remove brush and clean between brush and bearings. Also inspect bearings.) See Servicing and Rebuilding Brush Assembly.

11) Wipe machine and rinse bucket. (Note: Do not spray the air vents on the back door, control panel on the handle or any electrical components.)

12) Using shop towels and disinfectant, wipe down the entire machine and hoses.

13) Keep the bucket ventilated between rents by laying the bucket handle underneath the lid to prevent the lid from closing.

14) Check that all decals, instructions and safety warnings are in place and in good condition.

15) Inspect and clean the hand tool kit. Pull the hand tool trigger to drain the valve and solution hose.

6 MONTH INSPECTION AND SERVICE

1) Service the brush assembly. See Servicing and Rebuilding Brush Assembly, Page 14.

2) Check lid for leaks. See testing Lid (7LIDLM) Page 16.

3) Check coupler (10037) for leaks. Add water to tank. Make sure coupler and brass plug (10038) are connected.

Turn on hand tool switch and inspect connection for leaks. Disconnect coupler and plug. Turn on hand tool switch and check coupler for leaks. If leaking see Coupler Repair (4059) Page 16.

4) Check spray pattern. Add water to tank. Lean machine back and pull the trigger switch. With your hand, check the spray pattern making sure pattern is uniform. If it is not, the spray jets need to be cleaned.

5) Inspect power cord for cuts, scrapes and exposed wires. Also, check the plug for loose prongs.

6) Inspect drain tube assembly for leaks. Add water to the tank. If leaks are observed see Replacing Drain Tube

(#10159) Page 16.

SERVICE WARNINGS

Warning: Only genuine Kent Investment Corp. electrical replacement parts should be used. Failure to do so will void the UL and CSA electrical safety compliance and could result in fire, electrical shock, personal injury or damage to the model C-4.

Warning: 1. Do not tilt machine all the way back to floor with water in bucket. Water will go through lid, down to vacuum motor and may damage the vacuum motor.

2. If this happens return unit upright and place towel under exhaust port. Turn on the Suction Switch, run until no water discharges out of exhaust port, about 2 to 3 minutes.

Warning: Pump should not run dry for more than a few seconds. Running the pump dry may cause the pump to overheat.

6

NOTE: wires.

When replacing electric terminals a good crimp is essential. Double check new crimp. It should not have exposed

SYMPTOM POSSIBLE CAUSE SOLUTION

No power to the machine.

1. Building circuit breaker tripped.

1. Unplug any other equipment on the same circuit. Wait five minutes, reset circuit. Note: If breaker continues to trip, try outlets on another circuit. If new circuit continues to trip, DO NOT use the unit. All motors and wires must be examined for defect.

2. Defective wall outlet.

Power is intermittent to all or some of the motors.

3. Defective

5. Defective

Plug.

4. Loose Power Connection.

Power Cord.

1. Loose Terminal or Lever Nut.

2. Burned or corroded Terminals.

3. Defective Switch.

4. Defective Wire or Power Cord.

2. Plug machine into different outlet.

Also: Check if outlet is wired to a light switch.

3. Replace Plug (10109).

4. Check Lever Nuts (10267 / 10277) to black and white wires.

5. Replace Power Cord (18205).

1. Replace loose Terminals or reconnect Lever Nut.

2. Replace Terminals.

3. Replace Switch (10308/18032).

4. Replace Wire or Power Cord (18205).

Electrical short.

1. Damaged or loose wire connection that touches any metal on the machine.

1. Check for damaged or loose wires and make sure all ground wires are properly connected.

2. Defective motor touching improperly grounded metal on the machine.

2. Replace defective motor and make sure all ground wires are properly connected.

3. Wire , Power Cord or Terminal with worn insulation.

3. Replace Wire, Power Cord or

Terminal .

7

SYMPTOM POSSIBLE CAUSE

Vacuum motor is running with little or no vacuum to floor nozzle or hand tool nozzle.

1. Lid is not secure.

2. Defective or missing Lid Gasket.

SOLUTION

1. Secure Lid (7LIDLM) with Bucket

Handle (10086).

2. Replace Gasket.(10232)

3. Accessory hoses at back of the machine are not connected.

3. Connect Black (10077) and Gray

(10075) Hose Cuffs.

4. Debris blockage on Lid Filter Screen or Sight Tubes .

4. Clean Lid Plate Screen (10609) , and

Sight Tubes ( 10377).

5. Blockage in Vacuum Hose or

Vacuum Nozzle .

NOTE: If Vacuum Nozzle plugs repeatedly, the Vacuum Hose

(10256) may be over threaded into the

Vacuum Nozzle . Remove Vacuum

Hose and rethread into Vacuum Nozzle without over threading.

5. First check vacuum at the accessory hook up at back of unit. If there is good suction at Gray Cuff (10075) then the block is between the Black Cuff

(10077) and floor Vacuum Nozzle or

Hand Tool Nozzle . Clean Nozzle using lint hook. Clean Vacuum Hose using water, compressed air or a hand held pipe snake. NOTE: Vacuum Nozzle should be cleaned with a lint hook regularly. If suction is poor at Gray

Cuff , the block is between the Cuff and

Lid or Lid and Duct (10073) .

6. Loose Vacuum Cuffs .

6. Tighten Vacuum Cuffs . Check if threads are sealed with silicone.

NOTE: DO NOT over tighten. This may cause Vacuum Hose to partially block Vacuum Cuff , catching debris and blocking vacuum. ALSO: Wipe off any excess silicone squeezed into hose.

7. Hole in Vacuum Hose .

8. Damaged or missing Front (10031) /

Rear (10002) Nozzle Clips .

7. If small, patch. If large, replace

Vacuum Hose .

8. Replace Nozzle Clips . (See Repair

Manual: Replacing Front / Rear Nozzle

Clips ).

8

Excessive

SYMPTOM

Vacuum Motor noise.

POSSIBLE CAUSE SOLUTION

1. Worn Vacuum Motor bearings and / or fan blades.

1. Replace Vacuum Motor. (18007)

(See Repair Manual: Removing

Vacuum and Brush Assembly, and

Replacing Vacuum Motor.)

Burned motor smell from clean air exhaust.

1. Worn Vacuum Motor brushes.

NOTE: Excessive sparking may also occur.

1. Replace Vacuum Motor (18007).

(See Repair Manual: Removing

Vacuum and Brush Assembly, and

Replacing Vacuum Motor.)

All switches are ON, only

Motor does not run.

Vacuum 1. Defective Vacuum Motor.

1.

TEST: Test Vacuum Motor (18007) using Vacuum / Brush Motor Test Cable

(7202) . If motor runs, there is a problem with the electrical system.

NOTE: If motor does not work, replace

Vacuum Motor (18007). (See Repair

Manual: Removing Vacuum and Brush

Assembly, and Replacing Vacuum

Motor.)

2. Defective Switch .

3. Terminals not connected or defective.

2. Replace Switch (10308)

3. Re-connect or replace

.

Terminals .

Dirty liquid is being discharged through the Vacuum Motor Exhaust Tube

(10608).

NOTE: The solution is being sucked into the Vacuum Motor and then blowing out the Exhaust Tube.

1. The cleaning solution was not poured from the Bucket into the

Solution Tank .

1. Pour the cleaning solution from the

Bucket into the Solution Tank .

2. Foam is building up in the Bucket .

2. Empty Bucket without refilling the

Solution Tank .

CLEAN UP Step 1: Sit the Bucket aside. Move the machine to concrete surface, such as the garage. Leave the

Lid up. Run the Vacuum Motor only for

1 minute to blow out any remaining liquid.

3. Too much liquid was added to the

Solution Tank .

.

3. Empty

Line of cycle.

Bucket

Bucket

without refilling the

Solution Tank . Do not exceed top Fill

Line of . Add less water to the

Solution Tank during next cleaning cycle.

Bucket

Solution Tank

Bucket

Solution Tank

without refilling the

. Do not exceed top Fill

. Add less water to the

during next cleaning

Step 2: Clean the discharged dirty liquid from carpet immediately ! Spot

Remover or 7 in 1 may be needed.

ALSO: Using the Hand Tool may lift spot better.

9

SYMPTOM POSSIBLE CAUSE SOLUTION

Pump (18006) running (quietly or weak), with no or very little pressure to floor or hand tool spray tips.

1. Defective Diode. NOTE: The Diode controls which direction the piston pumps. If the Diode is defective, even a new Pump will not work.

1.

TEST: Test the Pump using the

Pump Motor Test Cable (7201) . If the

Pump runs normally, replace the Diode

Assembly (10409) . The Diode

Assembly is the Black Wire connected to the Pump and brown wire next to the yellow wire on the 8 Wire Cable

Assembly (18206 ). NOTE: Use only the Pump Test Cable (7201) to test the

Pump . There is a Diode inline on this cable. ALSO: Over time the test Diode may need replacing.

Pump running at full strength, very little or no pressure to floor or hand tool spray tips.

1. Empty Solution Tank.

Check if cleaning solution is still in removable

Bucket . This is a most common mistake. The solution must be poured from the Bucket into the Solution Tank .

1. Pour solution from the Bucket into the Solution Tank .

2.

Plug is not connected to the Brass

Coupler . NOTE: Plug may only appear to be connected to the Coupler .

2. Pull down on the middle of the

Coupler (10037) sleeve. Without letting up on sleeve, insert the Plug (10038) .

Release the coupler sleeve. The sleeve must snap back into position.

Give the hose a tug to ensure connection.

3. Clogged Pump Filter.

3. Clean the Pump Filter (10044) . Filter is threaded to the 45D Brass Elbow

(18211) connecting the Pump to the

Solution Tank .

NOTE: Reinstall the

45D Elbow and Filter carefully to avoid cross threading the Solution Tank .

Apply new Teflon Tape to Elbow

Threads prior to reinstalling to avoid leaking.

4. Clogged Spray Tips.

4. Remove and clean Spray Tips

(10242) .

10

SYMPTOM POSSIBLE CAUSE SOLUTION

Trigger Switch or Hand Tool Switch are activated and Pump DOES NOT run.

1. Loose Wire or Terminal connection.

Or Defective Switch or Terminal .

1. Test: Test Pump using Pump Motor

Test Cable (7201) . If Pump runs, there is a problem with electrical system.

Look for a loose Wire or Terminal connection. Or replace Trigger Switch

(18032) , Hand Tool Switch (10308) ,

Diode Assembly (10409) , Lever Nut

(10267 / 10277) or Spade Terminals

(10119) . If the Pump does not run, replace. ( See Repair Manual:

Replacing the Pump Motor.)

Pump runs continuously.

1. Hand Tool Switch is on during carpet cleaning.

1. Turn off Hand Tool Switch . NOTE:

Hand tool Switch must be off during carpet cleaning.

2. Defective Trigger Switch . NOTE: A defective Trigger Switch will run Pump continuously but may operate Brush

Motor normally.

2. Replace Trigger Switch (18032).

3. Stuck Trigger Switch .

3. Plastic around Trigger Switch may need to be trimmed.

SYMPTOM POSSIBLE CAUSE SOLUTION

Brush will not turn when Trigger Switch is activated, but will turn freely by hand.

1. Defective Trigger Switch. NOTE: A defective Trigger Switch will NOT run the Brush Motor but may operate the

Pump normally.

1.

Test: Inspect Terminals . Test Brush

Motor (18005) using Vacuum/Brush

Motor Test Cable (7202) . If the motor runs there is a problem with the electrical system. Look for a loose Wire or Terminal connection. Or replace the

Trigger Switch (18032) or Spade

Terminals. If Brush Motor does not run, replace . (See Repair Manual:

Removing Vacuum and Brush

Assembly, and Replacing Brush Motor).

11

SYMPTOM POSSIBLE CAUSE

Brush will not turn when Trigger Switch is activated, but will turn freely by hand.

2.

Brush Motor Circuit Breaker has tripped.

SOLUTION

2. Insure that Brush (10013) turns freely by hand. Reset Circuit Breaker

(10113). NOTE: If Brush does not turn freely by hand inspect Brush Assembly

(18210). (See Repair Manual:

Removing Brush Assembly, and

Rebuilding Brush Assembly).

3. Loose Wire, Lever Nut or Terminal connection.

3. Reconnect loose Lever Nut (10267 /

10277) or replace Spade Terminal .

4. Broken Gear Belt.

5. Slipping Pulley (10010).

5. Replace Gear Belt (10011).

6. Reattach Pulley (10010) to Brush

Shaft (10012) ensuring set screws and dimples in Brush Shaft (10012) align.

Brush

Switch hand.

will NOT turn when Trigger

is activated and will not turn by

1. Debris clogging Bearing Assy / seized Bearings .

2. Seized Brush Motor .

1. Remove Brush Assembly (18210)

Clean/replace: Bearings (10017),

Bearing Block (10195), Brush Washer

(10183) .

2. Replace Brush Motor (18005). Also inspect Brush Assembly (18210).

Brush Motor runs continuously.

1. Defective Trigger Switch. NOTE: A defective Trigger Switch will run Brush

Motor continuously but may operate the

Pump normally.

1. Replace the Trigger Switch (18032).

12

REPAIR MANUAL

Warning: Only genuine Kent Investment Corp. electrical replacement parts should be used. Failure to do so will void the UL and CSA electrical safety compliance and could result in fire, electrical shock, personal injury or damage to the model C-4.

REMOVE THE VACUUM AND BRUSH ASSEMBLIES

1. Turn all Switches OFF and UNPLUG the unit.

2. Remove Door (10606). Using a #2 Phillips Screwdriver remove (4) 10-24 Bolts (10150) attaching Door to Solution

Tank.

3. Disconnect the (2) Blue Wires marked "V", (2) Red Wires marked "B" and (3) Green (Ground) Wires.

4. Using a 5/16 Nut Driver unscrew the Duct Clamp (10071) then disconnect the Duct Cuff (10077).

5. Remove the Exhaust Tube (10608).

6. Disconnect the Brass Plug (10038) and Coupler (10037) and Vacuum Cuffs (10075 / 10077).

7. Remove the Brush and Vacuum Assemblies. Using a #2 Phillips Screwdriver remove (3) 10-24 Bolts (10150) and using 3/8 Nut Driver remove the (1) 10-24 Nut (10273) attaching the Brush Assembly to the Solution Tank. Next using a #3 Screwdriver remove the (4) 1/4-20 Bolts (10178), remove the Duct Strap (10076). Next lift the Brush Assembly up to clear the Stud (10187) then lay the Brush Assembly forward. Lift the Vacuum Motor Assembly out of the unit. Now the Brush Assembly can also be removed.

NOTE: Re-silicone the inner surface to the Exhaust Tube (10608) that touches the Vacuum Motor (18007) Exhaust

Port before reassembling the unit.

REPLACE THE VACUUM MOTOR (18007)

1. Turn all Switches OFF and UNPLUG the unit.

2. See (Removing Vacuum and Brush Assembly).

3. Remove the Vacuum Motor (18007) from the Duct (10073). Using 2 Wrenches with 7/16 Sockets unscrew the (3)

1/4-20 Nuts (10137) and 1/4-20 Bolts (10063).

NOTE: When reassembling the Vac Motor Assembly make sure the washers are replaced in the correct location.

(See Parts Diagram)

NOTE: Do not over tighten the Nuts (10137). This may result in cracking the Vacuum Motor.

NOTE: Inspect all Wires, Terminals and Hoses for damage before reassembling unit.

NOTE: Before reassembling the unit, all components should be cleaned.

NOTE: While the unit is apart the Brush Assembly should be inspected.

NOTE: Ensure Ground (Green) Wires are reconnected.

REPLACING THE BRUSH MOTOR (18005)

1. Turn all Switches OFF and UNPLUG the unit.

2. See (Removing Vacuum and Brush Assembly).

3. Disconnect the Brush Motor (18005) Ground (Green) Wire. Using a 5/16 Nut Driver remove (1) 10-32 Bolt (10152), from the Housing Brush (10001).

4. Using 5/16 Nut Driver remove the top (2) 10-24 Bolts (10182) holding down the (2) Brush Motor Straps (10008).

NOTE: Do not remove the bottom (2) Bolts holding down the Brush Motor Straps.

5. Bend both Straps up. Tilt the pulley side of the Brush Motor down to slip Pulley out from under the Belt (10011).

NOTE: While the Brush Motor is out, inspect the Belt (10011) and Bearing Assemblies (18016). Remove any hair or dirt. (See Rebuilding Brush Assembly).

NOTE: Show extra care when threading bolts into the Brush Housing, to avoid cross threading.

NOTE: Inspect all Wires, Terminals and Hoses for damage before reassembling unit.

NOTE: Before reassembling the unit all components should be cleaned.

NOTE: Ensure Green (Ground) Wires are reconnected.

13

REPLACING THE PUMP MOTOR (18006)

1. Turn all Switches OFF and UNPLUG the unit.

2. Remove the Door (10606). Using a #2 Phillips Screwdriver remove (4) 10-24 Bolts (10150) attaching the Door to the Solution Tank.

3. Disconnect the Yellow Wire marked "P", Brown Wire and Green (Ground) Wire.

4. Loosen the 5/8" Clamp (10329) that connects the Solution Hose (10238) to the Brass Elbow (18211) using a 1/4"

Nut Driver.

5. Install new Pump Assembly (4PUMA).

NOTE: Ensure Ground (Green) Wire is reconnected.

NOTE: Inspect all Wires, Terminals and Hoses for damage before reassembling unit.

REMOVING THE BRUSH ASSEMBLY (18210)

1. Remove Belt Cover (10100). Using a #2 Phillips Screwdriver remove (2) 6-32 Bolts (10026/10230).

2. Disconnect Belt (10011) from Pulley (10009). With thumb and index finger pull Belt toward yourself and down, rotating Belt off the Pulley.

3. Remove the Brush Bracket (10016). Using a #2 Phillips Screwdriver remove (1) 10-24 Bolt (10150). Using a 3/8

Nut Driver remove (1) 10-24 Hex Nut (10273)

4. Lift up on the pulley side of the Brush Assembly (18210) to rotate out of the Brush Housing (10001).

SERVICING AND REBUILDING THE BRUSH ASSEMBLY (18210)

1. Remove the Brush Pulley (10010) by removing (2) Set Screws (10276) using a 5/64 Allen Wrench. NOTE: First use a Heat Gun or Torch to expand the Pulley, making it much easier to remove the Set Screws and slide the Pulley off the

Shaft (10012). NOTE: When reassembling the Pulley add a drop of light duty thread locker to Set Screws. Align Pulley

Set Screws and the Shaft dimples. Without rotating the Pulley, slide it onto the Shaft until only the chamfered edge of the Shaft is sticking through the Pulley. Tighten only (1) Set screw. Turn the Pulley back and forth. The Set Screw should rock in the dimple but it should not rotate. If It rotates, it is not in the dimple and should be reset. Once in dimple, tighten second Set Screw.

2. Remove Bearing Assemblies (18016).

3. Clean and inspect Bearing Assemblies, removing any hair and dirt. NOTE: If Bearing (10017), Bearing Block

(10195), or Brush Core Washer (10183) are worn or damaged, replace them.

4. Inspect the ends of the Brush Shaft (10012) for dirt or corrosion buildup. Clean with low abrasive emery cloth and oil.

5. Inspect Brush (10013) for wear, replace if necessary.

REPLACING THE FRONT NOZZLE CLIP (10031)

1. Turn all Switches OFF and UNPLUG the unit.

2. Using a #2 Phillips Screwdriver remove (3) 8-32 Bolts (10274) attaching Front Nozzle Clip (10031) to Brush

Housing (10001).

3. Remove Front Nozzle Clip from Brush Housing.

4. Scrape away any remaining silicone from the inside of the Brush Housing Vacuum Nozzle.

5. Apply a thin bead of silicone to the new Vacuum Nozzle Clip outer surface that touches the inside of the Brush

Housing Vacuum Nozzle.

7. Add a drop of heavy-duty thread locker to the (3) threaded inserts in the Front Nozzle Clip.

8. Thread (3) Bolts into Front Nozzle Clip threaded inserts.

9. Wipe away excess thread locker and silicone from the outside and inside of Vacuum Nozzle.

14

REPLACING THE REAR NOZZLE CLIP (10002)

1. Turn all switches OFF and UNPLUG the unit.

2. Using a #2 Phillips Screwdriver remove (2) 6-32 Bolts (10004) attaching Rear Nozzle Clip to the Brush Housing

(10001).

3. Remove Rear Nozzle Clip (10002) from the Brush Housing.

4. Scrape away any remaining silicone from Brush Housing.

5. Apply a bead of silicone to the inside of new Rear Nozzle Clip.

6. Attach to Brush Housing.

7. Add a drop of light-duty thread locker to 2 threaded holes in Brush Housing.

8. Thread (2) Bolts into Brush Housing. NOTE: Be careful not to cross thread Brush Housing.

9. Wipe away any excess thread locker and silicone from the outside and inside of Vacuum Nozzle.

REPLACING THE TRIGGER SWITCH (18032)

1. Turn all switches OFF and UNPLUG the unit.

2. Remove Control Panel (10118). Using a #2 Phillips Screwdriver remove (4) 6-32 Bolts (10026) attaching the

Control Panel (10118) to the Handle (10600).

3. Using a 1/4" Nut Driver remove (2) 8-32 Bolts (2037) attaching Trigger Switch (18032) to the Handle.

4. Reaching inside the Handle, pull out the Trigger Switch (18032) while from the outside push the Trigger Switch into the slotted Handle opening.

5. Remove the Wire Ties (10158) and Lever Nuts (10267 / 10277) attached to the Blue and Black Wires. Disconnect the Blue Wire Flag Terminal Connector (10148) from the Circuit Breaker (10113).

NOTE: Ensure wires are firmly seated in the Lever Nuts (10267 / 10277). Bare wires should never be exposed and the Lever Nut should not grip on the wire insulation.

NOTE: Remember to replace the cut Wire Ties.

NOTE: When attaching the Trigger Switch to Handle start threading (2) 8-32 Bolts (2037) into Switch Mount Bracket by hand to avoid cross threading.

REPLACING THE ROCKER SWITCH ASSEMBLY (10308):

1. Turn all switches OFF and UNPLUG the unit.

2. Remove Control Panel (10118). Using a #2 Phillips Screwdriver remove (4) 6-32 Bolts (10026) attaching the

Control Panel to the Handle (10600).

3. Depress molded retention springs on either side of the Rocker Switch (10308), while pushing it through the Control

Panel opening.

4. Before disconnecting Wire Terminals, take note as to which Rocker Switch Terminal each comes from. Disconnect the Wire Terminals from the old Rocker Switch, and re-connect them to the corresponding new rocker Switch

Terminals.

6. Install the new Rocker Switch by pushing it through the switch opening in the Control Panel.

NOTE: Inspect all Wires, and Terminals. Replace any defective components.

NOTE: Remember to replace the cut Wire Ties.

NOTE: Rocker Switches should always have a Rocker Switch Cap. Always replace when missing.

REPLACING TERMINALS

1. Change terminals when burned, melted or discolored. Cut damaged terminal off with wire cutters, cut as little wire as possible. Using wire strippers, strip back insulation 5/16 of an inch. Now put new terminal on wire and crimp down on terminal with wire terminal crimping tool. Inspect crimp making sure no wire is exposed and the terminal is secured to the wire. All terminals should be inspected and changed if necessary when changing out vacuum motors, pumps, brush motors and rocker switches.

WIRING LEVER NUTS

1. If necessary strip 5/16 of an inch of wire insulation from wire with wire strippers. Lift orange lever on Lever

Connector. Put wire in Lever Connector hole. Snap down orange lever all the way. Pull on wire to make sure wire is secured in Lever Connector. Make sure no wires are exposed.

15

COUPLER REPAIR (4059)

1. Using 8 inch Vice Grips clamp the top ribbed or knurled portion of the Coupler; then using a 17 mm Open End

Wrench on the lower part of the Coupler twist counter clockwise to loosen.

2. Remove top of Coupler, Rubber Seal, Cone Spring, and keep Valve for reinstallation. Remove Spring from collared portion of the Coupler using a pointed tool. The two pieces will then come apart. Remove any debris that may be in the

Coupler.

3. Using a Coupler Repair Kit (4059) replace Ball Bearings and then the Spring (making sure the Spring is inserted all the way.) Then return Valve, and replace Cone Spring and Rubber Seal, and then thread top portion of the Coupler back to the lower portion and tighten. Without inserting the the Brass Plug (10038) into the Coupler run the Pump with water to ensure Coupler does not leak. If Coupler leaks, disassemble and reseat the Valve and Rubber Washer, then test again. NOTE: The Valve and Rubber Washer placement is critical to ensure Coupler does not leak.

REPLACING DRAIN TUBE (#10159)

Note: If there is a leak at the Drain it needs to be determined if the leak is between the Drain Tube (10159) and the

Drain Cartridge (18015), or the Drain Cartridge and the Solution Tank (18009). If the leak is between the Drain Tube and the Drain Cartridge the Drain Cartridge should not be removed from the Solution Tank.

1. Remove Door (10606). Using #2 Philips Screwdriver remove (4) 10-24 Bolts (#10150) attaching Door to Solution

Tank.

2. Remove the O-Ring (10430) from between the Drain Cartridge (18015) chrome flange and brass base. Push in on chrome flange ring on the Drain Cartridge (18015). While pushing in the flange pull Drain Tube (10159) at the same time. The Drain Tube (10159) will release from the Drain Cartridge (18015).

3. If there is a leak between the Drain Cartridge (18015) and the Solution Tank (18020) remove the Drain Cartridge from the Solution Tank by inserting a 5/16" Allen Wrench all the way into the opening of the Drain Cartridge. Turn the

Allen Wrench (Clockwise to Counterclockwise) to unthread the Drain Cartridge from the Solution Tank. Clean the Drain

Cartridge and Solution Tank threads and apply a good amount of Teflon Tape to the Drain Cartridge threads. Reinstall the Drain Cartridge being extra careful not to cross thread the Solution Tank threads, start the threading by hand before using the wrench.

4. Remove the Drain Insert (18204) and Drain Spring (10429) from the Drain Tube (10159). Cut about 1" off the end of the Drain Tube that was installed in the Drain Cartridge or replace the Drain Tube. Slide the Drain Insert (18204) onto a

Small Screwdriver, flange towards handle. Then slide the Drain Spring (10429) onto the screwdriver. Insert the Drain

Spring and Drain Insert into Drain Tube (10159) using the screwdriver. Put a new O-ring (10430) on Drain Tube, insert

Drain Hose Assembly into Drain Cartridge (18015). Push in hard until brass insert is all the way in the Drain Cartridge.

5. Slide the O-ring (10430) in between chrome flange and brass base of Drain Cartridge, using a little hook tool and 1/8 flat screwdriver.

TESTING LID (7LIDLM)

1. Make sure all Switches (10308 / 18032) are turned OFF. Plug in the machine. Make sure Bucket (10604) is in place and the Lid (7LIDLM) is secured by the Bucket Bail (10086). Disconnect the Grey and Black Vacuum Cuffs (10075 /

10077).

2) Turn on the suction and slowly vacuum water from an 8 oz. glass through the Grey Cuff. Water should appear in the right Sight Tube. The left Sight Tube should be dry. If water appears in the left Sight Tube, the Lid may need to be replaced or returned to Kent Investment Inc. for remanufacturing.

16

Model C4-A Parts

List and Diagrams

18

Housing, Brush/Alum. Casting

10002 Clip, Nozzle-Rear

Bolt, 6-32 x 1/4 Phil SS

10005 Washer, Lock #6 SS

Strap, Motor Brush

10009 Pulley, Threaded-Motor

Belt, Gear

10016 Bracket, Brush

Rivet, Alum 5/32 x 1/4

10025 Gasket, 2 Part-Brush/Sw. Panel

Clip, Nozzle-Front

10038 Brass, Plug 1/4 Barb

Brass, T-1/4 x 1/4 x 1/4 Barb

10057 Clamp, 1/4 Sol. Hose-Zinc

Bolt, 10-24 x 1/2 Phil SS

10152 Bolt, 10-32 x 3/8 Hex Ground, Grn

Wire, Tie-6"

10164 Washer, Flat #8 SS

Washer, Lock #10 SS

10182 Bolt, 10-24 x 3/4 Hex SS

Clamp, 1/4 Sol. Hose SS

10190 Bolt, 10-24 x 1/2 Hex SS

Spray Tip, Quick Dry

10250 Hose, Solution-90D Elbow to T - 1/4 I.D. x 2 3/8

10251 Hose, Solution-Plug to T - 1/4 I.D. x 21

10256

Bolt, 8-32 x 5/16 Phil SS

10275 Washer, Flat #10 SS

18005 Motor-Brush Wired C4 115 Volt Assembly

NFS Motor, Brush C-4 115 Volt, Unwired

10104 Terminal, Spade-Male Terminal, Spade-Male

10131 Terminal, Ring #10

10199 Tag, Wire B/Brush Motor (C4)

18008 Wire, Ground Housing Brush Assembly

Terminal, Bullet Female-Ground

10131 Terminal, Ring #10 Terminal, Ring #10

18010 Brass, Elbow 90 D

18018 Bumper, Assembly

18210 Brush Core Sub-Assembly

10010 Pulley, Set Screw-Shaft

10012 Shaft, Brush

10013

Shaft, Brush

10013 Brush, Reel With Flange

10183 Washer, Brush Core

18016

Bolt, 10-24 x 3/4 Hex SS

Bearing Block Assembly

10014 Bearing, Cap (metal)

10017 Bearing, Ball SS

10195 Bearing, Block (clear rubber)

19

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18009 Solution Tank, Assembly C4-A

10094 Decal, "Note Pour Here"

Drain, O-Ring

10432 Drain, Clip Assembly

10241 Cover, Drain Hose Clip

10435 Drain, Clip

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21

22

Washer, Flat 1/4 SS

10062 Stand-Off, Vac Motor-Alum.

Bolt, 1/4-20 x 3 3/4 Hex SS

10068 O-Ring, Duct

Clamp Gear, Duct-1 3/4 SS

10073 Duct, Vacuum

Nut, 1/4-20 Nylock SS

10172 Decal, Caution-Duct

Gasket, Vacuum Motor Cover 3 X 1/4

10232 Gasket, Lid / Duct-1/4 C4-A

Hose, Vacuum Duct to Lid w/Cuff Assembly

10077 Cuff, Hose-Vac Duct Black

10198 Hose, Vac-Duct to Lid 26

10602 Motor Cover, Vac C4-A

Motor-Vacuum Wired C4 115 Volt Assembly

NFS Motor, Vacuum-Unwired

10088 Screw, #10 Self Tap Ground Green

10104 Terminal, Spade-Male

10158 Wire, Tie-6" Wire, Tie-6"

10174 Washer, Lock #10 SS

10194 Tag, Wire (V) Vacuum Motor

18011 Ground Wire-Motor, Vacuum Assembly

10106 Terminal, Bullet Male-Ground

10131 Terminal, Ring #10

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23

24

4PUMA Pump, Motor Assembly

10037 Coupler, Brass, 5/16 Barb-Auto

Clamp, 5/16 Sol. Hose SS

10163 Grommet, Pump, Door, C4-A

Hose, Sol. Pump Inlet-1 5/8 C4-A

10239 Hose, Sol. Pump Outlet-3 3/4 C4-A

18006 Pump, Motor-Wired

NFS Pump, Motor

10132 Bolt, 4-40 x 1 Phil SS

10133 Nut, 4-40 Nylock SS

Ground, Wire-Pump

10105 Terminal, Ring #4

10106 Terminal, Bullet Male-Ground

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26

27

28

29

5HAN Handle Assembly

2037 Bolt, 8-32 x 3/4 Hex SS

10600 Handle, Machine-Gray

10025 Gasket 2 Part-Brush/Sw. Panel

10026 Bolt, 6-32 x 3/8 Phil Flat SS

10028 Shaft, Plunger-Detent

10029 Handle, "T" Detent

10030 Spring, Detent-SS

10111 Strain Relief-Power Cord

10112 Nut, Strain-Relief Power Cord

10113 Circuit Breaker, 120V

10115 Nut, Strain-Relief Cable 8

10118 Control Panel-120V

10123 Washer, Lock-3/4

10130 Decal, Handle Adjustment

10148 Terminal, Connector-Flag

10158 Wire Ties-6

10164 Washer, Flat #8 SS

10165 Bolt, 10-24 x 5/8 Hex SS

10166 Nut, 10-24 Nylock SS

10174 Washer, Lock #10 SS

10175 Washer Lock #8

10180 Washer .390 x .625 x .031 SS

10192 Crimp, Strain Relief, Power Cord

10193 Nut, 10-32 Ground-Green

10228 Wire, Black 5" Flag Cntr.-Hour Meter

10148 Terminal, Connector-Flag

10267 Lever Nut, Five Port

10277 Lever Nut, Three Port

10308 Switch, Rocker w/Cap

10319 Bracket, Cord Wrap-Upper w/ Protector

10322 Bracket, Cord Wrap-Lower w/ Protector

10403 Wire, Black 8" FML Cntr.-H.T.Switch to Lever Nut

10119 Terminal, Spade Female-18 Gauge

10404 Wire, Brown 8" FML Cntr.-H.T. Switch to Lever Nut

10119 Terminal, Spade Female-18 Gauge

10410 Wire, Black 8" Flag Cntr.-S. Switch to Lever Nut

10148 Terminal, Connector-Flag

10423 Hour Meter, Unwired

18205 Cord, Power Assembly Handle

10109 Plug, Power Cord

10131 Terminal, Ring #10

10171 Decal, Warning-Power Cord

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30

18032 Switch, Trigger Asm

10148 Terminal, Connector-Flag

10248 Nut, 2-56 Nylock SS

10263 Bolt, 2-56 Shoulder SS

10279 O-Ring, Switch Trigger

17097 Tag, Wire B

17099 Tag, Wire P

18035 Switch, Pump ASM

18036

Switch, Brush ASM

18206 Cable (8 Wire) Assembly Handle to Motors

10104 Terminal, Spade Male

10106 Terminal, Bullet Male, Ground

10119 Terminal, Spade Female-18 Gauge

10121 Strain Relief, Cable-Wire 8

10131 Terminal, Ring #10

10148 Terminal, Connector-Flag

10158 Wire, Tie-6"

17097 Tag, Wire B/8-Wire

17098 Tag, Wire V/8-Wire

17099 Tag, Wire P/8-Wire

10409 Diode Assembly

10119 Terminal, Spade Female-18 AWG

NFS Diode

NFS Parallel, Splice-Uninsulated

NFS Wire, Black, 1 1/2-Diode

NFS Heat Shrink, 2

16003 Kit, Diode

10409 Diode Assembly

10104 Terminal, Spade Male

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31

32

Part # Description

10039 Bolt, 1/4-20 x 3/4 Phil SS

10061 Washer, Flat 1/4 SS

10086 Handle, Bucket Bail

10087 Bushing, Flanged-Bucket

10176 Washer, Lock 1/4

10448 Decal, CRI

10604 Bucket C4-A, Blue

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33

34

Lid Assembly

10150 Bolt, 10-24 x 1/2 Phil SS

10174 Washer, Lock #10 SS

10275 Washer, Flat #10 SS

10377 Tube, Sight

10480 Decal, Instruction- Lid QD

10601 Lid, Gray (NFS)

10609 Lid, Plate w/Filter Screen

Gasket Lid/Duct 1/4 C4-A

Cuff, Hose-Lid

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35

36

8HTK Hand Tool Kit

10050 Spray Tip, 11002-Hand Tool

18302 H.T. Plastic Body

18305 H.T. Washer, Spray Tip

18306 H.T. Ring, Spray Tip

18307 H.T.Filter, Spray Tip

18311 H.T. Tube Ext.

18310 H.T. Valve Assembly

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38

39

7216 Decal, Purent

#10075 Cuff, Hose-Male Gray

#10197 Hose, Vac-Lid to Disconnect Length 13 1/2

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Notes

40