shuts off before filling
copressor shuts off before filling.
Note at what pressure the compressor shuts off. Drain the tank, start it again, and see if it shuts off at the same pressure point.
If you have a multi-meter, check to see if, when the motor shuts off and the tank pressure has not yet reached cut out pressure levels, if when the compressor shuts off, power is still flowing to the motor through the pressure switch.
It it is not, your likely culprit is the pressure switch.
If you want to add more info, please do it here as a comment so I can follow our discussion.
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harbor freight 40400 compressor
(Shingle Springs, CA)
Harbor Freight 40400 air compressor rarely used.
The start capacitor blew (130mfd 220-250 volts).
I replaced it with a Packard PTMJ108 rated 108-130mfd 220-250 volts. The tech at HB said this would work.
I turned on the compressor and it started building pressure just fine when after a minute the cap started smoking.
I shut it off then waited a minute, turned it on and it runs but the smoke starts up again after a short time.
I continued this a few times until it finally wouldn't start; the cap was getting warm to hot.
I waited for it to cool off and it started then smoked. I opened the motor, it looked ok but I did not find a centrifugal switch.
So, how does the cap get removed from the circuit once it gets up to speed? Or is it supposed to be continually charged? Should I have gone up one size to 130-158mfd? What should I be looking for when taking a meter to the motor wires? There are a few; the two blue ones going to the cap, two white going to the reset switch and finally the hot, neutral and ground to the motor. Your thoughts?
Tell me a bit about where the compressor was when you were using it and what it was plugged into, please, as a comment here.