2500 PSI Pressure Washer

2500 PSI Pressure Washer
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Karcher 520M wont operate at high pressure

When I turn the Karcher on it runs, butonly at low pressure. Doesn't matter whether the wand control is Max orMin.I have water supply of about 33 gal/min (15 litres/min) (i.e.sufficient to operate 520M). I dismantled the pump mechanism and cleaned everything.When I opened it I suspected the "spill valve" was jammed, but itsnow AOK.Anyone with any experience please? I can't quite work out what switches on the high pressure side of the thing.Exploded spare parts list at:http://www.m-and-d.com/karcher_parts.htmlANY pointers very gratefully received.Dave

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2500 PSI Pressure Washer

Product Troubleshooting for 2500 PSI Pressure Washer

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Answers :

The solution is very simple. All you have to do is change the spill valve. This because the spill valve is not worth servicing. The actual problem is that the spill valve is leaking from its bottom-part seating. When you close the gun, the spill valve goes down, opens from the underside, and switches the electricity off. When you press the gun, the spill valve returns to normal, and if the underside does not close, you have low presure, because the water keeps circulating. Regards, MG. (Karcher service engineer).

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