How to repair/clean centrifugal start switch
I have a single-phase electric motor that powers my air compressor. The motor trips the breaker after a few seconds as it does not start. I have replaced the start capacitor to no avail. I can use a non-conductor and manually close the circuit on the centrifugal start switch and the motor will run just fine. After a while the compressor will be at its designated pressure and the motor will turn off. Once I use some air and the motor tries to switch back on to recharge the tank, it then trips again.
So the problem seems to be that the motor's centrifugal start switch contact points are not meeting and closing the circuit.
Can I repair this switch or clean it somehow? I posted on another thread and was told that obtaining parts would be very difficult, especially for a 30 year old air compressor!
Attached are some photos for reference. The contact points are in the yellow boxes.