After hours of work changing my truck's AC over to R134, I find that my vacuum pump stopped working. I lover this pump! Weighs about 60 lbs. Consists of a refrigeration type sealed motor inside a cabinet. The on-off switch has a spring loaded "start" position. Motor has a 130-156 mfd capacitor strapped to the side. In the "on" position the windings hum until the cutout kicks in a few seconds later. Turning to the "start" position does nothing. I tried replacing the capacitor with 2 old ones from my abandoned house AC unit. Unit ran until 1 year ago, and both compressor and fan ran when abandoned. No luck.
I'm guessing that somehow the rotor (armature?) is jammed due to Northwest corrosion. Tried bumping the unit with a rubber mallet while starting.
Anybody have any ideas on how I can revive the starter windings, or whatever?
Hate to say goodbye this unit. Paid a lot of money for it (used), but, did get 35 years of use.
Thanks for all ideas.
Ivan Vegvary