2013 Drake Smith - Please do not use or reproduce this elsewhere.  Feel free to link to it though.

Rebuild Paralever Final Drive Bearings

One of the weak links in the paralever drive train is the final drive pivot bearings. These bearings are composed of four components:

1) Outer race that installs in the final drive housing

2) 20ish needle bearings

3) A plastic ring that holds the needle bearings in place - this is the part that usually fails and is the weak link

4) Inner race that holds 2 & 3 in place

 

None of these parts are individually available from BMW. To get a complete pivot bearing you need to buy part 33172311091 (about $68 USD new from a dealer.)  However, I happened to have saved some of these little parts lying around and had enough on hand to rebuild a couple of final drive pivot bearings.  According to the BMW parts catalog this is a 10X32X17 bearing so with that data you might be able to find a generic replacement.  Rubber Chicken Racing also makes replacement pivot bearings ($140/pair) that are supposedly superior to the OEM ones.

This bearing only had the inner race remaining in the left final drive pivot:

I had a spare good plastic needle bearing retainer ring and some needle bearings on hand so I assembled the following, using Mobil 1 synthetic bearing grease to hold the needle bearings in place:

Then I pressed it (by hand) into the outer bearing race and then inserted an inner bearings race. Voila! The finished product:

2013 Drake Smith - Please do not use or reproduce this elsewhere.  Feel free to link to it though.