I got this DV-142 vacuum pump (refrigeration style) and am a little bit disappointed. It seems seized. If I turn it on, it shakes, the motor hums, but the pump does not spin. The motor is coupled to the pump with a flexible coupling and it becomes visibly strained, but no movement. The motor seems to be fine.
I have a feeling that this pump is rusted inside and should be simply thrown away. While I am upset about it, the rest of the stuff in that lot seems like good stuff, such as a box of belts, 100 lbs Owatonna universal puller kit, concrete vibrator and two manual hydraulic pumps, so on balance it is likely to wotk out. But the pump is in quite sad condition.i