does any one know the part number or where i can get the a/c compressor cut off switch that shuts the compressor off when going up hills and putting a strain on the motor?
It has a full throttle cutoff switch... which is usually dead. It's a little plunger switch the throttle lever on the injection pump runs into... but the plunger is usually missing.
I've never found a suitable replacement for the switch... it's not worth worrying about. Yes, of course manually turning off the AC does the same thing.