Question about Karcher 2500 PSI Pressure Washer

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How do you clean the unloader valve on a power washer pump?

''How do you clean the unloader valve on a Karcher g 2500 vh power washer pump''. I contacted Karcher and they said if I've tried the easier solutions (I have) it's probably the unloader valve.

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  • gehummel1 May 13, 2009

    I'll try it. Thanks for your time!

  • Anonymous Mar 14, 2014

    valve was striped for cleaning and now when it is refitted and try to adjust it it either does not stop the pump or motor surges and causes the motor to trip out on overload (overheating).

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  • Master
  • 957 Answers

The unloader valve usually is replaced. I dont know if you can get o-rings for it. But if you want to take it apart, there will be a crown or cap style nut just below the spring. Unscrew it completely and you will be able to remove the spool. There is just a series of o-rings on it.

Posted on May 12, 2009

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Posted on Jan 02, 2017

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2 Answers

IT HAS PRESSURE BUT IT PULSATES INSTEAD OF STEADY SPRAY


I have same model with same problem. Tried the easy fixes:
unloader valve lube and clean, inlet water sufficient, and nozzles and hose are fine. Broke down pump and called for parts (about $50 for 3 inlet valves and some seals) hopefully this will fix it. Mine has been used in my business pretty hard for a few years, so not bad.
Joebro

Jun 11, 2011 | Karcher G 2600 VH Gas Pressure Washer

1 Answer

Pressure off and on every few seconds with my karcher 3000BH


hi there rjcomer2

here is web site for parts
http://www.ereplacementparts.com/karcher-2500-11944010-pressure-washer-parts-c-33388_33389_33973.html

sounds like you have a unloader valve problem or a crack in the pressure manifold housing between pressure outlet and unloader valve assy allowing unloader to cycle on/ off

or some dirt trapped in the unloader valve seat , make sure you have good supply of water - ie good flow from tap to pump

try cleaning unloader 1st and fitting in line tap filter

hope it helps

pauly46

May 20, 2011 | Karcher 2500 PSI Pressure Washer

2 Answers

Can the pump be replaced? If so can it be a "do it


yes, the pump can be replaced but I would recommend trying to repair the pump first, see this link to repair the unloader valve, 9 times out of 10 this is the only issue with the pump

Nov 05, 2010 | Karcher G 2600 VH Gas Pressure Washer

1 Answer

Karcher G2600 VH - low water pressure


If the spill valve activates is "spills" water under the washer. There is a restriction or the pump has become inefficient and will not pump the volume and pressure it should at full RPM.

Jul 20, 2010 | Karcher G 2000 MK 2000 PSI 20 GPM 87cc Gas...

1 Answer

Where is the unloader valve on my pressure washer


is not necessarily a cap, but could be a screw in plug, that should be close to the hose hook-up on the pump Inside there there should be a round ball and a spring that you can tighten or loosen to adjust the unloader and if it has been used ALOT, where the ball seats there could be grooves cut in there and you might need to get a valve kit to fix it

Sep 05, 2009 | Karcher 2500 PSI Pressure Washer

1 Answer

No pressure unless i take the nosle off , pull trigger and put nossel back on then it's ok until i release the trigger again ?


unloader valve sticking in the pump head. remove unloader valve/ pressure reducing valve as per parts manual.

It will probably be caked up in white crystal type deposits if its an aluminium pump head. clean off the deposits and inspect the 'o' rings. if 'o' rings ok , apply silicon grease and refit.

It could also be a partially blocked lance jet not allowing enough water to come out of the lance if it is a flow sensitive unloader valve.

Jul 11, 2009 | Karcher 2500 PSI Pressure Washer

1 Answer

Poor pressure


i had this same problem on my pressure washer.the pump had some broken parts in it .i found my replacement pump on EBay.

May 29, 2009 | Karcher 2500 PSI Pressure Washer

1 Answer

Honda power washer dont have presser


Your unloader valve is stuck in your water pump. Remove it, lube the top o-ring with silicone grease. Then reinstall it. Use pump guard additive to prevent this problem from reoccuring.

Jan 30, 2009 | Karcher 2500 PSI Pressure Washer

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