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Micha
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Joined: 10/12/2007
Posts: 275

Hello. I'm facing some difficulties with taking the tranny apart.
Both shafts on the pictures can't leave the housing because the shifting forks are (naturally) in the way. Extracting the axles of those shifters out of the casting seems to me as the wrong way.
Is there any method taking both shafts out?
I couldn't find the solution in the workshop manual.
I stopped the process immediately as I do not want to harm those shifting forks.
Please your help.

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  • a2.jpg
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Michael Steinmann
R51/3 1952
Engine Nr. 529466

caker
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VBMWMO #8161
Philadelphia area (NJ)
Joined: 11/12/2011
Posts: 118
Hi, Remove the set screw that

Hi,

Remove the set screw that retains the shaft the forks run on, then you can pull the shifter fork shaft out, along with the shift forks - THEN you can remove the trans guts.

Hope that helps,
-Chris

Micha
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Posts: 275
Hi Chris, Thank you for your

Hi Chris,
Thank you for your time.
Do you mean this one, I show here with the screwdriver?

  • 20180914_235359_resized.jpg
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Michael Steinmann
R51/3 1952
Engine Nr. 529466

caker
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VBMWMO #8161
Philadelphia area (NJ)
Joined: 11/12/2011
Posts: 118
My pleasure. Yup, that's the

My pleasure. Yup, that's the one. If I recall correctly, the shaft is an interference fit in the case, but a very small one. You should be able to gently tap the shaft in with a drift, and I believe no heat is necessary.

MOTORRAD STEMLER - BMW R 51/2, R 51/3 R 67/2, R 67/3, R 68 PDF is a fantastic resource. High quality images and also copypaste-able text one can use with Google Translate or for Googling part numbers (put them in quotes). Easy : ).

On page 24 (by printed page number) you'll see the shaft and also #26 "Gewindestift (Arretierschraube) für Schaltgabel-Führungsachse" or "Set screw (locking screw) for shift fork guide shaft" - but the image of the part is omitted : /

Bench Mark Works lists the part as:

07 11 9 904 817--$2.00--slotted cone-tip set screw 6x1x12mm shift fork shaft R5-R68 ss

Rinse, repeat!

-Chris

Micha
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Posts: 275
Hi Chris, It was exactly as

Hi Chris,
It was exactly as you described. And indeed no heat was necessary.
Thanks again for your effort and for not sending me instead to buy the famous (and expensive) Barrington motor works “bible”.
That is exactly the kind of help I needed.

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Michael Steinmann
R51/3 1952
Engine Nr. 529466

Daves79x
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VBMWMO #9030
Joined: 08/09/2015
Posts: 314
Well

Well, if you think the Barrington book is expensive, wait until something gets broken or done incorrectly for lack of information. It's worth it's weight in gold.

Dave

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Dave

Micha
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Joined: 10/12/2007
Posts: 275
It's not that I think the

It's not that I think the book is not worth the investment, I just do not have the budget for it right now.
I'm also pretty sure I'm not the only one here.
Yes, I am aware of the high prices BMW spare parts have, and the problematic of wrong installation due to lack of information and therefore I ask questions. On the other hand, if I am not mistaken here, I think that this forum is intended, among other things, to share information and to provide advice.
Thanks, and have a nice weekend all

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Michael Steinmann
R51/3 1952
Engine Nr. 529466

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