Manual for craftsman 33 gal 6 hp 919-165500 - Craftsman Air Tools & Compressors

SOURCE: vertical 33 gal compressor wont build pressure

could be a gaskit or the inlet reed

SOURCE: I have a Craftsman model 919.152932 33 gal

Sounds like the reed valves in the head failed. you need to replace the head (usually cheaper to get a new compressor)

Testimonial: "I hated to throw away an otherwise perfect condition compressor, but I had a feeling that was going to be the answer.Thanks for your help."

Brad

• 425 Answers
• Posted on May 18, 2012

SOURCE: I have a 33 gal craftsman compressor when I turn on the relay switch hums but the motor doesn't spin?

I would check the capacitor since it appears that the motor is not locked up. Here is a how to on testing capacitors;


how-to-check-capacitor

SOURCE: Craftsman Air Comp. 6 hp oil-less, 33 gal horz. tank - sounds really loud

Sources of noise from craftsman oil free compressors (could be Made by Campbell Hausfeld or Porter Cable) include loose fan, failing bearing/s on the piston rod and housing, failing seal ring on piston, air filter intake and loose motor mounts. With the housing cover off, check the fan blade for cracks or loose screw. Turn motor by hand till the piston is at top of stroke. Examine the cylinder for scratches close to top. If scratched, air is leaking past vinyl ring making noise and causing longer fill time. If everything looks ok, suspect noise coming from bearings. Hard to tell if bearings are failing by looking at them. I have seen many failures of the piston bearing on the crank (fairly easy to change, I use alternator bearing from auto parts ) , however, the bearing in the housing just behind the crank bearing is much harder to replacable. Good luck with your fix-it project.

SOURCE: Problem with Craftsman 33 gal Air Compressor 6 hp Horizontal k Oil Free Pump

i would look at the head gasket