Question about Karcher 2500 PSI Pressure Washer
Engine runs great but no reaction when squeezing trigger. Could use information on how to obtain parts and operation Manuals
If you are sure it is not a bad o-ring and you have re-assembled it correctly then try this.
Part # 8 in the pump, karcher # 9.001-187.0 includes a small bullet shaped valve. It could be leaking. It can be carefully disassembled and cleaned.
Posted on Jun 18, 2009
This sounds like the bypass (unloader) valve is sticking. Here is a diagram of your machine's pump. On page 2.4 see part #1. The top of this assembly is a black plastic cover. Remove all of assembly # 1 carefully. Under that is part #8. This is the bypass valve. You need to pull this out, check that the o-rings are not bent, worn or damaged, then lube it good with a VERY VERY good waterproof grease. Re-assemble it and all should be well. The part numbers are on the diagram but where to get them depends on were you live. Karcher web site may give you a number to call. Good luck.
Posted on Aug 25, 2009
Your bypass valve is jamming. All you do is take it out, put a smear of o ring grease around the o rings then put back in, make sure you push it all the way in and should fix the problem.
Posted on Sep 30, 2009
Hi, Karcher calls the unloader valve a spill valve,
this is a link to a full drawing/parts listing , and your fault description might well be a sticking /seized unloader(spill ) valve hope this helps
the part number is on page 9 of the drawing
spill valve 45910400
hope this helps , we usually use some good quality silicone grease to lube the valve ,
Posted on Mar 08, 2010
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