I've sold thousands of reman ac pumps, and hundreds of new ac pumps. I seemed to remember the new pumps coming back more often then the reman ones, due to a lower volume of new ones being made, and them sitting on the shelf longer.

Biggest thing I can say as a former parts guy, flush the condenser, then replace the orriface tube and drier. Lube the o-rings with pag oil (should be pag 150 iirc) when you re-assemble it.

~Nate

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95 Honda Shadow ACE 1100.
1999 Plymouth Neon Expresso. 2.4 swap, 10.5 to 1 comp, big cams. Autocross time attack vehicle!
2012 Escape, 'hunter" (5 sp 4cyl)