Having problems with your Pressure Washers ?

Pulsing and lost pressure

\015 Please can you help. I have a Karcher K3.91 about 2 years old, it now pulses when trigger is released and has hardly any pressure. I have taken it apart and checked the release valve and o-ring both seem fine. When it pulses you can see the pressure is released into the garden hose pipe because it moves, what do you suggest\015

Answers :

Depending on amount of use i have found failures of the piston spring and retainer which are located inside main housing of pump,these cause pulsing and no pressure,you need to remove pump head and face plate to get to them,hope this is of help
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Pulsing and lost pressure


Depending on amount of use i have found failures of the piston spring and retainer which are located inside main housing of pump,these cause pulsing and no pressure,you need to remove pump head and face plate to get to them,hope this is of help ... Pressure Washers

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This can happen if the head of the pressure pump has split. You may need a new head, and to stop this happening again, tie the rigger open with a zippy tie. The water will run all time now and automatically bleed any air form the system. When you wan ... Karcher Pressure Washers

Karcher K3.91, lost some pressure and pulsing when trigger is release. stripped it down and checked all six valves and there all sealing as they should. i took apart the unloader valve cleaned and inspected and thats fine. there is NO water leeks anywhere or oil. preasure washer is 2 years old and gets used once a week for ten minutes. i really dont understand why its playing up


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Hy; I have a karcher 580 I had to replace gun complete so I bough a simoniz xe01-001 at simoniz.osirus.ca/ for your info 69$ complete ***.I install NOW I get pulse up & down ONLY when trigger is press I turn valve down i only get 10% of pressure if i turn valve up that is when it start pulsing pressure up & down it wont keep pressure up ... Bob...


Most likely problem is that the tip is too small causing Unloader to bypass or restriction/debris in tip. Install clean tip of proper size or 1/2 size larger (example from 2.5 gpm to 3 gpm ) to prevent slow pulse. If tip is clean and /o ... Karcher 2500 PSI Pressure Washer

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Sounds more like a clog on the intake side. Check the filter and the hose on that side. ... Pressure Washers

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Our pressure washer loses pressure for no reason and it pulses. the water pressure is fine.


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