Changing you Pump Oil - Regularly,
July 9, 2007
By rbr2c from Lafayette, Louisiana
"Let me begin with a story. I didn't change the oil in my pressure washer because I had no idea it was needed. Well, it is..and let me tell you...if you don't change regularly, the pump will literally self destruct. Bolts shear, leaks blast out from all seams, then finally the reciprocating mechanism ceases. After replacing my factory pump with an awesome Northern Tools COMET brand pump and checking/changing the oil after each wash job, this pump runs cooler, and has more power than the original equipment. After each job you should check the oil and fill or replace it. Notice that after you drain and fill the reservoir the oil is at the recommended level. After you run the pump for about 8 hours you'll notice the pump oil level has risen past the full mark. Why...because all pumps have water that normally slips past the seals into the oil. This creates an OIL and Water mix that will emulsify into a cream color and has a reduced ability to lubricate. My Solution is this: When the oil has increased it amount past the full mark it is time to change the oil. Ever since I've followed this procedure my pump and its delivered pressure have been awesome. Word to the wise....after you run the washer for about 4 hours STOP and check the oil. If you are loosing oil and the level goes down then your pump is delivering oil in the water on to what ever your cleaning and you pump may be showing signs of normal wear.
Buy some oil and change it at least as often as you change the oil in the engine and more often than that if you want you pump assembly to last."
What is your level of technical expertise? Professional
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