Question about Karcher Garden
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Posted on Jan 02, 2017
Sounds like the pressure valve is broken thats why you cant depress the trigger , the valve is on the pump , i would suggest taking it to a repair shop as they are fiddly things to fix
Posted on Jun 05, 2009
I have the same problem. With mine I have to remove the tip that I am using then pull the trigger and then replace the tip and pull and pressure should return. I believe that one of my valves is sticking causing me to reprime the pump frequently. I am trying to clean or replace my valves to fix the problem.
I hope this helps.
Posted on Apr 25, 2009
From your posting, I assume you have removed the splash cap and the nylon bypass valve cover. Connect the water supply to the pump and connect the high pressure hose and wand to the pump outlet. Wad up a small towel and place it over the bypass valve opening to catch the valve insert when it pops out. With the engine throttle closed, pull the starter cord several times to see it the valve insert will pop out. If it doesn't come out after two or three pulls, set the throttle to low and start the engine. I have performed this procedure a number of times and the valve insert always pops out. There is no real danger of the valve parts getting seriously airborn since the actual pump output volume is very low (2.5 Gal/min).
Posted on May 23, 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
Usual cause is the pressure valve sticks closed and doesn't admit more water to be pumped. Usually needs new O RIngs and cleaning the bore... ABout a 15 minute job at most. Get an O Ring kit for it.
The valve is held shut when pressure on the output is high. When you open the trigger, the pressure drops and the valve opens letting more water come in from your garden hose.
The O RIngs dry out and bore gets dirty. Polish it with crocus cloth on a dowel rod. Lube the O Rings with lube intended for O RIngs.
Posted on May 08, 2010
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