Question about Karcher 2500 PSI Pressure Washer

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Karcher K 2400 HH Pressure Washer no pressure

I have a Karcher pressure washer model K2400 HH that I got from Costco. It won't go high pressure. I checked everything according to the manual but no go. Karcher tech suggested that it could be a sticking unloader valve that I can clean and lube myself. They said "There are only two bolts that keep the valve cover in place so do not remove more bolts than this. Do not take any other bolts off or you will open the pump and lose oil. Typically they need to be cleaned and not replaced. Do not operate the unit with this valve remove or unbolted." However I don't see 2 bolts that will remove anything. Looks like 4 bolts removes the whole end piece. Suggestions? '

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  • jeff64999 Feb 10, 2013

    I had the same problem. I took the cheesy black plastic thing off, lubed the part with lithium grease and it worked like a champ.

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  • Aron Kerr
    Aron Kerr Apr 05, 2012

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On top of the pump you will see 2 screws or bolts after removing plastic cover. this is the unloader. pull off the cap and put some oil on top of unloader replace top and see if it works. if not will have get a pair of pliers and pull unloader out and clean. This will work had same problem with mine.

Posted on Aug 30, 2009

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I had the same thing. Had to use Lithium grease to get it to work properly. Must take the cheesy plastic thing with the silver top off first to get at it. Only lubed the large o-ring. Works like new.

Posted on Oct 05, 2009

  • BRANDON SANDE Aug 24, 2012

    PULL UP ******* THE UNLOADER VALVE,ITWILL COME

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What type of oil do you use?
What kind of oil is in the pump?

Posted on Jul 11, 2013

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1 Answer

I have a K2400 HH pressure washer. When I started using the machine this year, the pressure would last for a moment or two than quit. When I would shut off the pressure and wait a few minutes and start...


sounds like a weak or worn out unloader valve spring.



MODEL DESCRIPTION PRICE SN-060-216 Pressure SpringKarcher/53323910 $5.90cart.gif


You can find parts online through Karcher or Ebay if you wish.

I hope this helps!

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See page 16 item 8 of this Manual: (<-click and download

Then you should be able to remove the pump.

Thanks for using FixYa.

Kelly

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