Step 1
Disconnect the spark plug wire from the spark plug installed on the Troy-Bilt engine. Tip the pressure washer on its back using the handle.
Step 2
Pull off the chemical hose from the pump nozzle, which is on the right side as you view the pump from underneath the pressure washer.
Step 3
Use a nut driver to unscrew and remove the three mounting bolts in the flanges on the pump. The flanges are arranged in a triangular pattern. Each bolt connects through a flange with a nut. Pull the pump off the engine shaft from below.
Step 4
Slide the new pump in position on the engine shaft. The pump is pre-lubricated by the manufacturer and needs no other additional preparation.
Step 5
Secure the pump with the three bolts and nuts, tightening each with the nut driver.
Step 6
Slide the chemical hose onto the nozzle of the new pump.
Step 7
Set the pressure washer upright and reconnect the spark plug wire when you are ready to use the equipment.