On one of the "later" engines I went back to the "diaphragm" type pumps found in the early W123. The top of the air cleaner had to be swapped out for one with a vacuum fitting. The rebuild kits for those pumps are considerably cheaper also. They can, of course, lose their ball bearings too

One cause of a vacuum pump going south with catastrophic results is "for and aft (laterel?) play in the timing device due to a worn bushing on the intermediate shaft. If the timing device can be pushed back and forth more that 1mm, beware

__________________


1985 Euro 240D 5 spd 140K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"