How to Replace the Pump on a Troy-Bilt Pressure Washer

The pump on a Troy-Bilt pressure washer is the heart of the equipment. A gasoline engine powers the pump, which pressurizes the water for cleaning with the attached spray nozzle. Although the pump can be dismantled to its component parts, Troy-Bilt sells replacement pumps as a complete assembly. Replacing the entire pump is simpler than repairing an old unit. Use hand-held tools to complete the project in less than an hour.

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.