I have a Craftsman 150 PSI, 33 gallon air compressor. It started smoking and I immediately turned it off. I contacted Sears and they don't make the motor for this air compressor any more. The part number for the motor is Z-D26712. Is there any chance it could be a small problem that we can fix ourselves.

SOURCE: Sears Craftsman 3-Gallon, 1.5 HP Air Compressor Hums

YES IT MAY BE THE CAPACITOR . IT COULD ALSO BE THE WIREING IN THE MTR, THE PUNP ITSELF.

SOURCE: I have 33 gal craftsman 1.6 vertical air

Sounds like you do,but I would check the wires as well

SOURCE: My 33 gallon air compressor will at start build up

Most likely it is the unloader valve. This is inline with the air filltube from compressor to tank. Somestimes the unloader valve is screwed into the tank and air tube is attached to it. This device takes the pressure out of the tube so the compressor can start without the back pressure from in the tank. Other possibility, the start capacitors of the motor. The capacitors must give a kickstart upon startup or the motor will just hum for a couple seconds and overload the breaker. A tempoary solution is to turn off the power to compressor when it reaches 120psi, then allow the pressure to drop to 40 or less, then turn power on and mostlikey compressor will start with a load of 40psi or less. It is a nuisance but it works until you replace the bad part. Goodluck,Macgivor

SOURCE: Air compressor won't go over 40 psi?

my ace air compressor which is 26 gallon 5 hp will not get over 60psi what is wrong with it please?

SOURCE: 33 gallon craftsman reaches 40 psi. Motor

check head gasket