There are a few things you should know to makechange out or repair the pump. You may also need to study up on preventative maintenance so that you do not have to worry about pump failure. Your pressure washer probably has one of two different pumps if it is industrial grade. Either a Cat Pump or a General pump; both are industry standards. General is the leader in the industry for sales and many prefer Cat as it sucs better from plastic water tanks.

Your pump is powered by two parallel belts connected to your engine. You should make sure not to starve your pump from water. When the water tank is empty turn off the engine. Starving a pump will burn it out in about thirty-five minutes. The manufacturer says five to ten minutes, but thats not life threatening. Your pump has a safety feature whereby when you are not spraying the water, it will automatically by pass into the tank provided there is enough water for the complete loop.

You should change the oil in the pump every month. Make sure your pressure washer rig is on level ground and fill the pump to the red dot on the center of the eyeglass. Over filling is a really bad idea. On your pump you will notice six large bolts. Inside of the holes are check valves  with springs. After 300-500 hours you should change them. You can do this yourself. The valve kits are $60.000. Its very easy: Unscrew bolts Remove old valve Replace valve Make sure to seat the valve evenly Screw the bolt back in by hand Make sure the O-ring on the bolt is snug Tighten with wrench pretty tight Inspecting The Pump If you drain the oil and its got bubbles in it or has turned white, then you have a blown seal and water is getting into the oil because: It overheated due to water starvation; The casing cracked because of vibration; You forgot to change the oil, dummy ($600 mistake and one lost days work if you can get the parts that fast). Check to see if the belts are tight. If not tighten them. Look for water drips.

A slow drip on the exit side of the pump could cost you as much as 150 PSI at the nozzle. A fast drip (two to three drops per second) could be a 250-300 PSI loss at the nozzle. A steady drip stream might be a 500 plus PSI loss. When you see water leaking, fix the leak ASAP.

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