I recently purchased a new manifold for a H120 washer. The manifold came without the unloader valve set. How is the valve set??
Are you talking about the electric switch that shuts off the motor when the trigger is released?
If so, there is an arm that comes out of the high pressure side of the manifold and is connected to a spring loaded piston. The piston extends under high pressure (spray trigger released) and retracts when spraying. At the opposite end of the arm is an allen screw and locknut. The allen screw bears on the microswitch arm to control the electric motor. When properly adjusted, the motor should turn off when the trigger is released. If it doesn't, loosen the locknut and adjust the allen screw slightly outwards toward the switch. Pull the trigger a few times and verify the motor starts up and shuts down when you release it. Tighten locknut.
Hope that helps.
The Microswitch also wears down in time with use. Anytime the motor does not shut down with trigger released, this adjustment needs to be made.
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SOURCE: 020209 pressure washer has no pressure
Your water inlet may be stopped up. Whether this model only has a screened hose washer or a better filter, pay special attention to that. Be sure the pathway is free and clear.
Take each of poppet valves and while pushing (with a pencil or something) on the part that moves up and the spring pushes it back down - with magnification and lots of light, be sure there isn't a small piece of debris affecting one of those valves. Its easy to miss, so look very closely.
Next, remove the hose from the pump. We are by-passing the entire unit that includes pressure hose, trigger gun, lance, spray nozzle. If it seems to pump a lot of water out of the pump--then the problem is most likely the trigger gun is clogged or the pressure nozzle is clogged. Some trigger guns can be taken apart -- some, not so much. Same with nozzles.
I hope this helps you, Randell. If yes, please take a sec to rate me. Thanks!
Don
SOURCE: Where can I get seal rings and o rings for my
MSC industrial www.mscdirect.com sells metric O-rings by the bag. If you measure what you've got, you can make an educated guess what to replace with.
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