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I have a Craftsman pressure sprayer Model # 580.752060 and it will not pressurize the spray. I have replaced the 6 plastic valves. Motor runs great. Suggestions?

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Check the unloader valve for dirt or wear.

Posted on Sep 15, 2010

Testimonial: "need description of unloader valve"

  • gbarden355 Sep 15, 2010

    Which is the unloader valve? I removed the one with a strong spring, greased and "worked" it so that it moved freely. I adjusted the set screw in the end both ways and still no pressure.

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Where is the reset button located?


The manual for your sprayer list several possible causes of the motor not starting, but does not indicate the presence of a reset switch. It has Thermal Overload but is reset by simply letting the motor cool.
From the manua: lProblem
A.
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Troubleshooting cause
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There is a check valve that keeps air pressure from coming back to the compressor head and the relief valve.
I think the check valve is leaking tank pressure to the relief valve and compressor head.
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