Question about Karcher 2500 PSI Pressure Washer
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Posted on Jan 02, 2017
To determine if your problem is due to an easily replaceable part, follow these steps:
1. Connect the water supply hose, the pressure hose, and the wand WITHOUT any nozzle tip.
2. Turn on the water supply, and press the trigger until water is smoothly running out of the nozzle
after any air is all purged out. Release the nozzle trigger.
3. Start the engine, and let it warm up for about 30 seconds.
4. With the engine running smoothly, press the nozzle trigger. The water should flow out of the nozzle (without the tip installed) at a faster rate, while the engine noticeably loads down as it used to do before your "no pressure" problem. If it does not load down, turn it OFF, and disconnect everything, and contact a Karcher repair facility.
5. If the engine does load down, release the trigger, and install one of the nozzle tips (not the black one).
6. Press the trigger, and the engine should load down, and you should have normal pressure from the wand. After you release the trigger and press it again, you will probably again have no pressure, and the engine will not load down. Removing the nozzle tip, pressing & releasing the trigger, and re-installing the tip should give you normal pressure again, but releasing the trigger will cause no pressure until you again remove the tip, press the trigger, and re-install the tip.
This is caused by a bad UNLOADER VALVE, which is located under a black cap with a metal button on it located on the top front of the pump. I don't know if you can purchase the replaceable parts from a Karcher repair shop, but when a neighbor & I took his washer to a repair place, it looked pretty simple to do this repair, and he was charged about $60 to replace a $5 (maybe) part, and it took about 5 minutes.
Posted on Sep 17, 2008
Leaving the hose on shouldn't cause a problem so don't panic. It sounds like you could just have a dirty nozzle. Try sticking a pin or something in the end of the nozzle (machine not running) and giving it a clear out. also if it is a two peice gun, split it and tap the squirting part on something clean like a workbench to clear any debris that might have got in there.
Posted on Nov 01, 2008
I have a Karcher pressure washer w/ a 5hp Honda engine. It only will run while the choke is pulled out and only runs at about half the rpm's. When the choke is pushed in.. it coughs, sputters and shuts off. Can you tell me how to fix this....
Posted on Nov 05, 2008
Go to www.karcher.com ,click on your region and then click international. Enter the model of the machine or the type number . That is is the first 8 digits of the number under the barcode. This will take you to the parts listing for your machine.
Posted on Mar 11, 2009
there is a loader and unloader valve on your pump bolted to it. if it frozen in the open position it will never build press. most of the time this is caused by leaving cleaning solutions in system after use and let set up for a long period. it causes the aluminum case to corrode.;you will have to dissassemble and clean if not to bad. if not your going to have to replace.
Posted on Apr 21, 2009
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