When replacing--or just inspecting-- these shafts/gears, replace the bearing/bushes also,--Especially the one behind the I.P Timer/Sprocket, which can wear Externally and become loose in the block....
there is an earlier and a later type. The earlier one has a small bush face on the 'vertical' oil-pump drive shaft gear top bearing (The part thats pressed into block holding bush)
These earlier ones wear quite badly.
The later ones have a larger thrust-face and wear less. These are fitted to 615, 616 and N/A 617 engines
Both types are interchangeable PROVIDING you have the plug/bush holder (oil-pump drive-shaft top bearing holder) that fits into the block matching whichever type you want to fit....
My 1980 N/A 617 had the 'smaller' thrust face version, and I have installed the 'later' large thrust-face version from a later 616 in its place as the bush and O.P. drive gear and thrust-face was worn.....
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Alastair AKA H.C.II South Wales, U.K. based member
W123, 1985 300TD Wagon, 256K,
-Most recent M.B. purchase, Cost-a-plenty, Gulps BioDiesel extravagantly, and I love it like an old dog.
W114, 1975 280E Custard Yellow,
-Great above decks
needs chassis welding--Really will do it this year....
