Its happened twice now .. The compressor is an 80 Gallon Champion with a 5hp Baldor motor.. (Its about 2 years old, I think) .. only been hobby used. I doubt it has 40 hours on it.. dunno ..
The motor has an FLA of about 23 amps. Its wired to a 40 amp breaker.
It starts up fine. Takes about 4 minutes to reach 150 PSI .. Nothing has changed.. Most of the time, it just runs fine. no big deal. I use it to supply a small wide belt sander various other things..
When kicking back on at say 110 PSI ... to refill the tank, it works fine about 90% of the time, the other times, it makes a terrible sound, makes a weird smell, and kicks the 40 amp breaker on the panel.
I think the smell is the belt slipping. The pump won't turn easily .. Its like the 110 Psi is too much for the motor to get the pump running again. The weird thing is that the compressor is managed by an Allen Bradley Mag starter. I'm surprised the 40 amp breaker trips and not the reset.
Here is a picture of the beast new..