Question about Craftsman Air Tools & Compressors
The motor does not have enough power to overcome headpressure. Two areas to check for your problem. Valve plate in head (broken reed valves/gasket) or unloader not bleeding air out of system. Your compressor has a small valve under the pressure cut out switch that unloads the pump (bleeds air out of tube). It is actuated by a small arm that comes into contact with valve when cut out pressure is reached. Verify that air bleeds out of system when set pressure is reached. You will hear air escape for just a moment. You mentioned that the check valve is working (or holding pressure in tank, spray soapy water on valve with tube removed). If checkvalve is leaking, pump motor can not overcome pressure. If valve plate has leaking or broken valves, the motor will strain and the air will discharge at a very high temperature. Your pump can use sears parts or maybe even porter cable. Good luck.
Posted on Sep 11, 2010
There should also be a relief between the check and the head...this should relieve the pressure and is what has failed...
Not sure where exactly it is on your particular model, but you should be able to find it by following the piping back from the check to the head or it is built right into the head...
Posted on Sep 10, 2010
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Posted on Jan 02, 2017
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