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How do I Change the Pump Oil on a Briggs & Stratton Pressure Washer?

Gus Stephens

Briggs & Stratton's Proseries Model 20330 gas-powered, cold water pressure washer delivers a flow rate of 4.2 gallons per minute at 3,700 p.s.i. Developing more than 75 times the pressure of a typical garden hose, the Model 20330 is suitable for cleaning everything from decks and driveways to siding, garage floors and cars. Briggs & Stratton recommends checking the hydraulic pump oil level before each use and performing a routine oil change after every 500 hours of operation.

Preparing the Washer

  1. Place the washer on a level surface and engage the spray gun trigger lock.

  2. Start the engine and let it run for at least five minutes.

  3. Shut off the engine and turn off the water supply. Point the spray gun in a safe direction and squeeze the spray guy trigger to release water pressure.

Changing the Pump Oil

  1. Disconnect the spark plug wire from the spark plug and place a drain pan under the oil drain plug.

  2. Use the adjustable wrench to remove the oil filler plug and O-ring from the top of the pump housing and the drain plug from the bottom. Allow pump oil to drain out completely.

  3. Replace the drain plug and tighten to 50 lbs-inch torque. Place a funnel in the oil filler and fill with 18 ounces of CAT 6107 Hydraulic Pump oil or an approved equivalent. Replace oil filler cap and O-ring and tighten finger tight. Reconnect the spark plug wire to spark plug.