20 Most Recent Craftsman 15 gal Air Compressor 3 hp UMC Horizontal k Oil Free Pump - Page 9 Questions & Answers

Are you talking about a wiring diagram or an exploded view of that switch?

What is the make and model of the compressor?

No on the torch, it might warp the shaft. The use of an arbor press us highly advised

make sure it is on a 20 amp breaker

replace gasket

This is usually caused by long extension cord, leaking check valve or weak capacitor. Most likely leaking check valve. Easy to check, run compressor for a couple of minutes and shut off. Listen for air leaking from pressure switch or at the intake filter. If leaking, let out air and remove check valve and look for debris stuck under the valve seat. To find the checkvalve, follow the air discharge tube from the head of the compressor to the tank. You should find a brass or chrome valve threaded into the tank. If check valve is not leaking, suspect weak capacitor or long cord (motor shop will test cap for free). Good luck