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Originally Posted by jbaj007
I just took the yoke off the front of a GM AC Delco R-4 that I had sitting around. It was NOS for a 90's Chevy Suburban (I think....pretty sure).
Despite what I thought  (and what some have said on some of the other MB mailing lists and forums), there WAS an "X" and TWO oil journals on the inside; one to the front needle bearing and one to the shaft seal.
The journals point to the center (obviously), so mounting this R-4 with the "X" up would seem to be wise; gravity being what it is and all.
I have taken apart several other R-4's and never noticed this before. The yoke on this R-4 was the smaller version (there are two models of R-4's; lightweight and regular). |
I wonder if you or someone else can talk about the compressor on my 1984 300 SD. The name plate identifies it as a " Harrison -Mod# 320". Is this 'lightweight' or 'regular', or what? I makes a lot of noise, so I disconnected the belt - I think it needs only a new or remanufactured clutch. But where to get one - that is the question!
Padraig