Motor started idling really rough. looked under the hood, and the first thing I noticed was the wing nuts for the PS pump and air cleaner were gone. ... got replacements. Had to add fluid to PS pump (just a little low), noticed pump was loose. Went to tighten it up, found (or did not find) missing pivot bolt.

motor was idling rough because PS pump was loose, belts flapping.

I've pulled pump tight, but I still need to pivot bolt. junk yard is out of mercs.

?Do any of you know what sized bolt is used as the pivot bolt on a W123 300D? Please advise if you do.

__________________
MC Professor

1981 300D non-Turbo
with unknown 617. motor and 711.311 transmission