Karcher Karcher-Pressure-Washer-Repair-Manuals/Karcher-Pressure-Washer-Parts-and-Basic-Repair-Service-Manual-Pump-SM9120-0140-G3025BH-G3025OH-G3050OH Repair Manuals

For Karcher Pressure Washer Parts Call 606-678-9623 or 606-561-4983

Service Handbook

High-Pressure Washer Pump

9.120-014.0

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For Karcher Pressure Washer Parts Call 606-678-9623 or 606-561-4983

A. Water Inlet Filter

1. Remove filter with a screwdriver.

2. Clean filter with warm water and mild
soap.

3. Reinstall filter.

B. Detergent Check Valve.

2

C. Nozzle Insert

1. The nozzle insert is located inside of
the high pressure outlet.

2. Unscrew the nozzle insert with a wide
blade screwdriver.

3. Check the nozzle insert for wear,
damage or debris in the opening.

D. Thermal Relief Valve

1. Remove detergent tube and nipple.

2. Remove o-ring, ball and spring.

3. Clean o-ring and ball.

4. Reinstall spring and ball.

5. Use silicone grease to hold o-ring to
bottom of nipple.

6. Reinstall detergent nipple and tube.

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1. Remove the deflector cap and tube.

2. Unscrew the thermal relief valve plug.

For Karcher Pressure Washer Parts Call 606-678-9623 or 606-561-4983

D Thermal Relief Valve cont.

3. Remove the o-ring, thermal valve and
spring.

E. Bypass Valve

5. Lubricate the large O-ring only. Use
Lithium grease.

6. Install the Bypass Valve and plug.

F. Low Pressure Check Valves

The low pressure check valves are inline
with the water inlet.

3

1. Remove the Bypass Valve plug.

2. Use needle nose pliers to remove the
Bypass Valve.

3. Inspect Bypass Valve for damage and
proper lubrication. Replace valve if
necessary.

4. Inspect O-rings for nicks & cuts.

1. Unscrew the valve plug.

2. Remove valve with pair of valve
pliers.

3. Clean or replace the valve assembly.

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