Karcher HD 655 S Does not come up to full pressure
I have a Karcher electric pressure washer which has started to dump pressure before it comes up to pressure.
If I slowly adjust the pressure control it comes to about 40 bar and dumps. I have stripped the pump to check for worn seals etc. but everything looks fine. I have used a 1/2 inch garden hose for years with no problems. Occationally it will come up to full pressure momentarily so it seems the pump is OK.
Is there any further checks I can do?
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Re: Karcher HD 655 S Does not come up to full pressure
Yes...check the check valve. A one-way directional valve, this part is also known as a DUMP valve. It opens when too much pressure builds in the hand wand (when not spraying water) in order to protect the pump, by returning the high pressure to its source reservoir. I suspect the DUMP valve is stuck in open condition (or nearly open).
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The test / reset buttons are for a Ground Fault Interrupter built into the cord / washer. This device will help prevent deadly electric shock in the event of a malfunction - it is the same technology used in "GFI" electrical outlets located in bathrooms, outdoors, basements, etc.
You should have this serviced - or replaced before using.
I have the same Problem, the leak is from the seam of the Manifold or on the pressure side of the Pump and the hose housing. In my case there is a small crack in the seam of the Manifold Housing. A manufacturing defect.. A New Manifold Complete Replacement about the half the price what I paid for this pressure washer at Walmart... :(
If under 1 year old, and you can find a receipt,Karcher will replace the whole Pressure washer under warranty.
try going to www.karcher.com
then click on europe
then service and will then see spare parts, enter k620
tick the button for you are a engineer and you are on your machine
micro switch might be at fault.