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View Full Version : Pressure washer pump inop


kitch428
Apr 11, 2010, 04:18 PM
What's the most common problem when the pump quits. I have a Craftsman 6.5 OHV w/horizontal shaft motor. The pump is attached to the output shaft, or the front of the motor. Model 580.767300
I took the pump face off and I can tell you this, the 3 pistons do move in and out, and the piston seals look good.
I replaced all the O-rings and put the face back on, but absolutely no pressure comes out. Water will stream out the outlet (but w/o pressure) so there are no clogs. Engine runs great. Any Ideas?

cdad
Apr 11, 2010, 04:51 PM
Its possible it could be the internal valve that is stuck. It's a regulator valve.

kitch428
Apr 11, 2010, 05:06 PM
I see a total of 6 check valves in my parts list. Hmmm, wonder if it's worth it. Thanks for getting back to me.

Edit: 4/12 Sold it on Craigslist today. Off to Lowe's. Decided to get the Troy Built 3000 psi model.