Question about Craftsman Air Tools & Compressors
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Posted on Jan 02, 2017
SOURCE: Air Compressor, low pressure
does the compressor keep running all the time but never gets above 40 or does it turn off at 40?
if it is turning off at 40 I would try using another gauge just to be sure it is 40psi, and if that is the case then you probably have a faulty pressure switch, if the compressor is constantly runnign but won't get past the 40psi then you may have a worn out compressor, check the oil for either a low level or if the oil is dirty, if it is you may just need to drain and refill but if that doesn't fix the issue then you will need to rebuild the compressor
Posted on Oct 11, 2008
Pistons may have lost their seals and not compressing the volume it needs. It's not turning off at 40 correct? That would be the pressure switch. Oil lubed probably like taking a small gas powered engine apart. Check the walls for scoring and such. If none to deep you can get an attachment for a drill to hone them. Auto parts will have that, parts depend on how old but should be at if you have like Sears Appliance repair stocks many different parts for what not. VERY expensive to let them do it but is an option for you. Make sure you have specs for torque and such for the bolts. And your sure no leak or pressure relief valve, yea you would hear that. I wish it was something else.But that's all I can think it would be if it's running continuously.
Posted on Nov 20, 2008
You compressor has a pilot valve that controls the tank pressure and the speed of the engine. Locate the brass pilot valve, (It has a flip lever that unloads the compressor) you will notice that it has two locking nuts that allow for adjustment when loosened. Loosen the small lock nut and turn the upper-most part of the pilot valve out to reduce pressure, in to increase pressure. Hope this helps, enjoy.
Posted on Dec 11, 2008
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