How to install a pressure washer O-ring kit

Disconnect the spark plug wire from the spark plug.

Sort the O-rings in the kit by size.

Using the proper size wrench, turn the high-pressure outlet fitting counter-clockwise to remove it from the pump.

Pull the old O-ring off of the high-pressure outlet fitting.

Clean any residue from the old O-ring off of the threads of the high-pressure outlet fitting.

Insert the new O-ring on the high-pressure outlet fitting.

Lubricate the new O-ring with a small amount of silicone lubricant.

Apply a small amount of thread-locking adhesive to the threads of the high-pressure outlet fitting.

Reinstall the high-pressure outlet fitting onto the pump and thread it into place.

Tighten the high-pressure outlet fitting securely using a wrench.

Using the proper size wrench, turn the unloader valve counter-clockwise to remove it from the pump.

Pull the old O-rings off of the unloader valve.

Clean any residue from the old O-rings off of the unloader valve.

Insert the new O-rings on the unloader valve.

Lubricate the new O-rings with a small amount of silicone lubricant.

Thread the unloader valve into the pump and tighten it with the wrench.

If there’s detergent in the detergent reservoir, clamp the chemical injection hose near the chemical injection valve.

Pull the chemical injection hose off of the valve.

Using the proper size wrench, turn the chemical injection valve counter-clockwise to remove it from the pump.

Pull the old O-ring off of the chemical injection valve. 

Clean any residue from the old O-ring off of the chemical injection valve.

Insert the new O-ring on the chemical injection valve.

Lubricate the new O-ring with a small amount of silicone lubricant.

Thread the new chemical injection valve onto the pump and tighten. Reconnect the chemical injection hose. 

Release the clamp from the chemical injection hose, if used.

Use the proper size wrench to remove the check valve caps from the side of the pump. Turn the check valve caps counter-clockwise to remove.

Pull the old O-rings off of the check valve caps.

Clean any residue from the old O-rings off of the check valve caps.

Insert the new O-rings on the check valve caps.

Lubricate the new O-rings with a small amount of silicone lubricant.

Place a small amount of thread locking adhesive on the check valve cap threads.  

Reinstall the check valve caps and tighten them securely. 

Reconnect the spark plug wire to the engine and test the operation and check for any leaks.

Start the pressure washer and check for leaks.