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Info on 1951 R51/3 please
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- Posts: 61
- Joined: Sun Dec 12, 2010 3:57 pm
Telescope Fork
Please weigh in. With thanks,
Stephan
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Stephan Pretorius
New Hampshire, USA
- rdnNHandAZ
- Posts: 131
- Joined: Wed Feb 16, 2011 7:00 pm
Tool instead?
Lakes Region, NH & Sonoran Desert AZ "Have Leatherman Will Travel"
If you must make a mistake, make a new one each time.
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- Posts: 61
- Joined: Sun Dec 12, 2010 3:57 pm
I hope the heavy hitters weigh in...
The cavity was filled with metal particles and the source for them easy to find - see the pictures. Based on simple mechanics, we know the smaller gear always fails first and it is clearly evident that it happened in this case as well. What is strange though, is the fact that the larger ring gear shows hardly any signs of wear.
The question is now how to move forward from here (I don't know how readily available there parts are:
1. Do I only replace the smaller pinion?
2. Do I replace the pair?
3. Any other reasonable options?
I attached pictures of the pinion with the damage and also the other relevant parts. The last picture shows the thrust bearing on the large gear impregnated with some of the grinding paste...
I would love to hear from those who had to rework the rear drive or those who have seen similar failures.
With thanks,
Stephan
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Stephan Pretorius
New Hampshire, USA
- Darryl.Richman
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You should always replace
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All of the parts are readily
- Darryl.Richman
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Scott's right with his
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Darryl and Scott
Splines on the wheel interface: I tried to take a good picture, but I was somewhat unsuccessful. The splines look good - minimal wear. Another enthusiast mentioned that for my use, they'd do well.
Scott I signed up to receive all updates n Weiss und Blau and I follow your postings often - thank you very much - your site very interesting and insightful.
I have one more question: the bell cover over the U-joint is a left hand thread. Is it a through left hand thread (ie. does it screw into the casing part with a left hand thread as well?
Thanks all!
Stephan
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Stephan Pretorius
New Hampshire, USA
- Darryl.Richman
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If your BMW dealer is
I would continue using your splines, but they are worn. You can see at the bottom of each spline how thick it was originally, and you can see that they are worn on both sides from that. If you investigate the inside of your wheel hub, you'll likely find tha the mating splines are also worn. If/when you do eventually buy a new set of splines, swap the front and rear wheels so as to get the "new" set of hub splines to go with the new drive splines; they will last longer that way.
The bell cover has a left handed thread, and the thread on the final drive casing is a matching left handed thread. (I'm not really sure what you're asking here.)
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Thanks Stephen for the kind
If you utilize Vech for his expertise, knowledge and availability, then I would recommend buying the parts from him as he certainly earns his sales.
I too was baffled by the question on the bell housing cover. It is left hand thread, and screws on the the steel collar that tightens down on the pinion bearing in the housing. This too is left hand thread. If your steel threaded part is bunged up, these are available new as well.
Scott
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Having read my own posting again I agree
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Stephan Pretorius
New Hampshire, USA