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

remove shroud and see if fan is broken but may be piston is shot

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.

Some of the craftsmen compressors have pistons that are coated on the top of the dome. Once the coating wears off, they have severe loud piston slap. If you continue to run it the way it is, it will snap the connecting rod in half or break the piston and possibly the cylinder.

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

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

TRY LETTING THE AIR OUT MOTOR IS PROB SEIZED,

Sounds like part #27 is worn. Replace # 24 24 A 24 B and 24. the cylinder may be worn. Perhaps depending on the age and time and labor replace with new comp. maybe Dewalt.

most likly the regulator is no good, some can be serviced, some are sealed units.

The motor is dying on your compressor. If it is still under warranty take it back. If you replace it do not get the oil free design. They are not designed to be fixed.

Hi, my name is John. Welcome to FixYa. Check for air leaks, and clean the filter. Thanks for choosing FixYa....John