The New And Improved Unofficial R65 Forum V2

Technical Discussion => BMW Technical Q&A, Primarily R65 => Topic started by: balibeemer on August 30, 2008, 12:15:15 AM

Title: CHANGING THE OIL SEAL ON THE FINAL OUTPUT DRIVE
Post by: balibeemer on August 30, 2008, 12:15:15 AM
HELP!  Oil is leaking from the final output drive - all over the rear brake shoes. I have checked the Haynes manual unsuccessfully - Are there any tricks to changing out the oil seal? :-[
Title: Re: CHANGING THE OIL SEAL ON THE FINAL OUTPUT DRIV
Post by: montmil on August 30, 2008, 12:12:56 PM
Quote
HELP!  Oil is leaking from the final output drive - all over the rear brake shoes. I have checked the Haynes manual unsuccessfully - Are there any tricks to changing out the oil seal? :-[

Even though it's a big ol' diameter seal, same precautions as any others. I used a small wood block and a tack hammer to GENTLY drift the seal home in a circular pattern of tap...tap...tap. My local bearing supply vendor had to special order the seal at about $18.00USD plus another $10.00USD shipping.

Watch out for the drive splines. Don't want to nick the seal's lip. Also, do the spline lube chore while you're in there.

Monte
Title: Re: CHANGING THE OIL SEAL ON THE FINAL OUTPUT DRIV
Post by: willr65 on August 30, 2008, 01:05:17 PM
Are you 100% sure it's the big seal?????   It could and may be the "O" rings sealing the brake operating arm leaking. Much easier to fix!
Title: Re: CHANGING THE OIL SEAL ON THE FINAL OUTPUT DRIV
Post by: Justin B. on August 30, 2008, 08:56:03 PM
Second the motion made by Will...
Title: Re: CHANGING THE OIL SEAL ON THE FINAL OUTPUT DRIV
Post by: balibeemer on August 31, 2008, 01:09:46 AM
I never thought of that! - And how do I replace the 0 ring seals for the brake operating arm?
Title: Re: CHANGING THE OIL SEAL ON THE FINAL OUTPUT DRIV
Post by: donbmw on August 31, 2008, 01:21:14 AM
Remove brake shoes then removed brake arm and push brake shaft out of final drive.

Don
Title: Re: CHANGING THE OIL SEAL ON THE FINAL OUTPUT DRIV
Post by: willr65 on August 31, 2008, 05:35:09 AM
Brake operating arm showing three "O" rings. You need to remove the splined arm off the shaft and also the brake shoes. The shaft should just pull out with a little persuasion.
Title: Re: CHANGING THE OIL SEAL ON THE FINAL OUTPUT DRIV
Post by: montmil on August 31, 2008, 01:30:40 PM
...and us folk here in the Colonies usually score O-rings at the local hardware store. Cheap.

Monte
Title: Re: CHANGING THE OIL SEAL ON THE FINAL OUTPUT DRIV
Post by: nhmaf on August 31, 2008, 08:41:35 PM
While it is most likely a rubber seal, I had a slight oil leak in my final drive that turned out to be  a bad/loose cover bolt and washer.    Cleaned up the area where the bolt & washer contact the inside cover of the final drive and replaced bolt and washer -> no more leak.   I don't know why it started to leak there, but it did, and has been tight ever since..