Motor runs strong, Pumps pressure is weak and pulsating. Water feed is fine. Could it be internal- Piston wear or easy fix like Check Valve replacement?
If the pump is pulsating rapidly most likely valves are leaking or debris under valve keeping one or more from closing. If the pump pulsates slowly, comes up to pressure then low pressure then repeats, problem is pressure regulator /bypass. Or you could have a combination of both. Try lowering the pressure to lowest setting to see if slow pulsation stops. As parts age within pump and debris hinder operation you can no longer operate at full pressure. To make the pump last, use highest pressure as needed and everyday work using only 60 to 75 percent of capacity.
SOURCE: landa pressure washer manuals
send them an email at [email protected] or contact them directly at 800-526-3248 for more info specific to your model which was not listed above. hope this helps you
SOURCE: pulsing Campbell Hausfeld 1300 psi 1.6 gallon electric
the unloader valve is deffective , this has a small metal rod which activates a microswitch to turn the machine off , replace the unloader valve
SOURCE: Need to lower 1750 psi to 300 psi on my portable power washer.
Don't starve the inlet to the pump. It will detroy it.
Buy a pressure regulating valve and plumb it in line per the instructions. Do not use a relief valve because you will have to have a return line or you will heat the water up on the inlet side of the pump depending on how the pressure washer is set up. It should already have a safety relief valve. You might look and also find a pressure regulator that is adjustable and all you problems will be solved.
SOURCE: 1750 psi Electric Pressure Washer: My pressure washer is losing pressure and is pulsa...
I have d'same problem before. replace the head component with the 3 little cylinders,springs etc.. its a 1 piece part.
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