Question:I have a Snap-on Ram air, direct drive, 2 stage compressor model (RA6180DV). Was working fine, cycling properly. Then I heard it try to start, it hummed for a couple seconds, then blew breaker.
I have verified electrical power. I can turn compressor over by hand. Oil level was on the low side of the sight glass, but good. Had high pressure valve problems in the past, it acts the same way. But removed valve and makes no difference. Suspected motor issue, removed motor had the windings and capacitors checked. Was told they were bad. Had motor rewound and capacitor replaced. Installed motor. Same issue, no change. Obviously I missed something, but what?
Two things more to check. Pull the intake filter and see if that makes any difference.
If not, open the tank drain and try to restart with an empty tank. Any change.
If it still won't go, and power is actually getting to the motor circuit, you've had the caps checked and replaced, it still sounds electrical to me.