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.

Things You'll Need

  • Nut driver set
  • Needle-nose pliers
  • 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.

  • 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.

  • 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.

  • Slide the new pump in position on the engine shaft. The pump is pre-lubricated by the manufacturer and needs no other additional preparation.

  • Secure the pump with the three bolts and nuts, tightening each with the nut driver.

  • Slide the chemical hose onto the nozzle of the new pump.

  • Set the pressure washer upright and reconnect the spark plug wire when you are ready to use the equipment.

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