How to Replace Pressure Washer Control Piston With Nipple - Karcher

Make and Model of Pressure Washer Used in This Video

Karcher K3 (1.601-813.0)

Part Used in This Video

Karcher Pressure Washer Spare Parts Set Control Piston With Nipp

1. Tools needed

All you’ll need is a Phillips screwdriver and T15 torx screwdriver.

To remove the control piston with nipple and install a new one, firstly eliminate all power.

2. Remove wheels and casings

Then, remove the wheels. 

Remove plastic outer casing

You need to remove all the screws holding the plastic outer housing shell in place. These might be tightly secured, so take your time.

Remove detergent tank holder

Then, remove the four screws holding the detergent tank holder in place at the bottom. You can then remove the pipe hose and the tank away from the pressure washer. 

There will be two more screws that need to be removed. One on either side of the yellow housing.

3. Remove control piston with nipple

Remove the detergent suction pipe hose and lift the motor up and out.

Twist the nipple 90 degrees. You’ll then be able to remove it. Now with your T15 screwdriver, remove the control piston and spring.

4. Install new control piston with nipple

With your new control piston and spring, place it inside and make sure it’s in by pressing down with your screwdriver. You can then attach your new nipple.

5. Re-fit casings and wheels

Place the motor back in the casing and reattach the detergent suction pipe hose. Then, pop the plastic housing back on. For this to attach securely and easily, you may need to unscrew the four screws with a Phillips screwdriver on the black casing at the bottom of the handle.

Re-fit outer casing

Then, go ahead and re-screw all the screws back into the plastic outer housing. And if you unscrewed the four screws on the bottom of the handle, also re-screw these in.

Re-attach detergent tank holder

You can then re-attach the detergent tank holder and re-screw the four screws in.

Then, attach the detergent suction pipe hose back to the detergent tank.  

Re-attach wheels

Refit both wheels.

And that’s it, your new control piston with nipple is all set to go! 

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