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Need schematic and instructions for service

Need schematic and instructions for servicing of the unloader valve on a Karcher HD2600DK pressure washer.

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Here is a schematic HD2600DK

The unloader is on D-2 ( all the parts between #5 and #11)

Posted on Sep 17, 2009

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I have a Karcher G2500HT. When I pull the trigger the pump will not engage. I pulled the pump off, checked the seals, and cleaned the screen. When I put it back on there was no leakage but the pump...


I would have to agree with your service department. The unloader valve works like this, When you press the trigger it closes and allows the water to build pressure through the pump. When you let off the trigger the valve opens and by-passes the water through the pump so you don't damge the pump. If this valve is sticking and remaining open the pressure will not build. You can remove this valve and clean relubricate with white lithium grease just a coating and this should clear up your problem. Check the port that the valve sits in and if you see gunk just clean with carburetor cleaner and blow it out with air compressor. A new unloader valve can cost between $40.00 - $60.00. Try to clean first before you buy a new one. The valve is usually located near the outlet that you connect your pressure hose to. If you can't find it go to jackssmallenginerepair.com and do a parts look up for your machine and you will see where this valve is located. Hope this helps.

Jul 20, 2011 | Karcher 2500 PSI Pressure Washer

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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

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Pump goes on and off continuously with the lance shut. Brief run of the pump every 2 or 3 seconds as if the pressure needs topping up. No leaks visible antwhere.


hi , the most common cause's of this fault is a deffective unloader valve or a small peice of dirt or grit caught in the pump valves , unless your quite mechanically competant i would suggest you take it back to your local Karcher service agent as to repair them your self is quite a involved process , if you want to try a repair yourself this link is quite good
http://www.paddockdrayage.com/Karcher/index.htm

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We have a Karcher G2500VH pressure washer. If you start the engine with the trigger pulled on the spray wand it will run at full pressure until you release the trigger. after that, when you pull the...


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
http://www.pressureparts.com/ManualViewPage.aspx?Manual=/mmDEV/PDF/karcherparts/g2500vh.pdf

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 ,

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Unloader Valve - Karcher Pressure Washer


where is the unloader valve locaed on a Briggs Stratton pressure washer?

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Clean and unloader valve on Karcher hd3500 pressure washer -intermittent pressure on and off. Cleaned inlet screen. Think unloader valve is is under pressure knob? Will cleaning help?


Hi:
Cleaning it is not enough. You need to make sure the o-rings are in good shape and grease it with a very very good waterproof grease. Here is a schematic of the pump. The unloader is parts 7 to 13 on D-2

Sep 08, 2009 | Karcher Garden

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I have a sticking unloader valve in my Karcher 3050. where is it and how do I fix it?


Hello:
Here is a schematic. On page 2.1, part #1 is the unloader valve. You need to remove it and lube it with a very good waterproof grease. Also insure the O-rings are in good shape and the spring action is working.

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


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.

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My Karcher HD 1050 DE has lost pressure, ive had new valves put on it but still has no go in it


could be allsorts. seals worn. ceramic pistons split, inlet manifold split( frost damage), unloader valve sticking, etc etc.

Put mains water pressure onto it and look for leaks, then run machine and see if it increases pressure, if not i would suspect unloader valve sticking.....

Not very familiar with the 1050 but i'm a service engineer for high press cleaning equipment...

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