Quote:
Originally Posted by funola
Can you point out which part in the pic below is plastic on the lever kit? I would assume it is under load. Why the change to plastic?
I can't find the section in the FSM for the vac pump test procedure. Can some one please post it?
I have a piston VP from my 240D which I will draw a vacuum on the outlet pipe and see if I can see any movement in the roller/ lever.
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Inside each bearing is a plastic separator, called a cage, that holds the six balls and spaces them evenly. It's part of the bearing and not serviceable separately. If the plastic cage disintegrates, it allows the balls to collect on one side, opening enough of a gap in the bearing to allow the bals to fall out.
I suspect all the original W123 vacuum-pumps had plastic bearing-cages. The new replacement pump on my'84 300TD has metal cages, while those on the new lever-kit I installed on my '82 240D, are plastic.
Happy Motoring, Mark