Preparing the Washer
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Place the washer on a level surface and engage the spray gun trigger lock.
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Start the engine and let it run for at least five minutes.
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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
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Disconnect the spark plug wire from the spark plug and place a drain pan under the oil drain plug.
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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.
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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.