What is the procedure for removing the vac pump on my '83 300 CD?

I have obtained one, whats the procedure for testing it? With the check valve installed, I am pulling 25" + -, but, its just good to a "good check valve", right? Not really testing vacuum pump, right?

Whats in the way of removal? I ruined 2 bolts holding the fan/clutch to the water pump. Could only get 10mm oe wrench on them, 2 would NOT loosen, rounded off the corners to protect my knuckles. No room for any kind of box-end wrench. Used vice-grips for extra rounding of corners, but got them out.

I am rapidly approaching the point where I unload everything MB and buy a Hyundai or even a Chevrolet, , , ,

Even with the fan off, I am unable to loosen the bolt/nut that the alternator 'pivots' on, I actually rounded that bolt off, with a 17mm 6 point socket, I thought the socket cracked when it turned, just the nut rounding off, tho.

I'm getting REALLY frustrated here, friends & neighbors, , ,

-corne-

(radiator/fan shroud removed)

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