Is my compressor shot?

I never tried to start motor with the belt off. Any time it tripped the reset I allowed it to cool(motor was warm), reset it, and spun by hand. There was next to no resistance(no compression buildup). As i mentioned, my memory could be wrong but I thought it would build psi by hand).
Pics of new psi switch installed. Black plastic tube from bottom of switch runs back to tank. I swapped over the brass psi relief valve from the old one. You can see a "motor" contact missing in original psi switch. That's where I thought the problem was. Included insert from new switch and also pic of old switch.
Thanks
Steve

SIX225 said

Will the motor run when not connected to the pump? I believe that the pressure switch that turns the motor on/off has an unload function to allow the motor to start. Might even have a check valve associated with it. Also, does it have a start capacitor? Definately check the tank for corrosion before putting too much money into it. Unfortunately my Craftsman from 1992 has rusted through. Might be my fault as I've never been good about keeping it drained. I hear you on the sentimental part.

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