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Hi,
I am new to the forum. I am having problems with my craftmen 2hp air compessor, 25 yr olds. When the pressure switch is in the auto position and reaches pressure, the switch hits the unloader valve and drains the tank until the next cycle. It also hits the unloader valve in the off position and totally drains the tank. I tried changing the pressure switch which included a new unloader valve and check valve but I still have the same problem. Does anyone have any ideas?
Thanks,
Travis
 

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1. Please post some close pictures of the mechanics referred to or a link to the model’s parts diagram.
2. I have a 1hp 1972 Craftsman with an added pressure switch but not the Pop-Off Valve (that relieves excess PSI).
3. I’m almost sure both valves, pressure switch and pop-off can be adjusted if needed. What is the psi setting?
4. I would suspect and inspect for debris (rust/Etc) causing problems.
 

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