The New And Improved Unofficial R65 Forum V2

Technical Discussion => BMW Technical Q&A, Primarily R65 => Topic started by: Barry on July 25, 2009, 01:48:35 PM

Title: Rear Drum brake spindle O rings
Post by: Barry on July 25, 2009, 01:48:35 PM

While I had the rear wheel off recently for a new tire, I took the trouble to remove the brake shoes and operating cam for a general clean and re-lube.

I noticed there were no O rings on the cam spindle and when cleaned it was a fairly loose fit in the rear drive casting. The spindle had 4 grooves but they were much too shallow to fit O rings.

Anyone know if this is normal for a 79 model ?

Title: Re: Rear Drum brake spindle O rings
Post by: Bob_Roller on July 25, 2009, 02:44:11 PM

RealOEM parts catalog, shows at least one o-ring on the brake cam, regardless of what year the bike is .

Title: Re: Rear Drum brake spindle O rings
Post by: montmil on July 25, 2009, 02:51:39 PM

Hey, Barry... Was there an oil drip/leak from the brake shaft? There ought to be at least one rubber ring in there.

I have heard of bikes with anywhere from two to four o-rings. Some owners may have machined additional o-ring grooves for 'insurance'.

Monte

Title: Re: Rear Drum brake spindle O rings
Post by: Barry on July 25, 2009, 03:18:29 PM

No leaks Monte. I was just curious and I thought I had read that there should be O rings also the Haynes manual said there should be one.

Just found this on Snowbums site :-

"Prior to 1980, most did not have any O-rings, you simply cleaned the shaft, greased it, and there was a felt just inside the right side actuating lever, at the spline end"

I have the felt so looks like mine never had any.

Thanks for the replies guys

Title: Re: Rear Drum brake spindle O rings
Post by: montmil on July 25, 2009, 04:12:45 PM

Sometimes, a couple of us hereabouts, might kinda rag on the Snowbum. He can get kinda wordy but give credit where it's due. He does exhibit a vast knowledge of BMWs. Tip o' the hat, Barry.    Monte