Pls help me identify this part

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Micha
Posts: 374
Joined: Fri Oct 12, 2007 2:24 am
Location: Israel

Pls help me identify this part

Post by Micha »

I found this shim inside the parts box as I assembled the crankshaft bearing.
I do not know of course whether it belongs to the crankshaft issue and I also do not find it in the photos I did while disassembling.
In short - I can't remember it and I have no idea where to put it ...
Please note that little drill.
Thank you for any help.

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Michael Steinmann
R51/3 1952
Engine Nr. 529466

Daves79x
Posts: 413
Joined: Sun Aug 09, 2015 8:13 pm

Looks Like

Post by Daves79x »

It looks like the rear crank bearing splash shim, but not quite. It has a few more 'steps in the body than any I've seen. But that's my best guess.

Dave
Dave

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Micha
Posts: 374
Joined: Fri Oct 12, 2007 2:24 am
Location: Israel

Thanks. I also think it is

Post by Micha »

Thanks.
I also think it is something to do with bearings, but I did not see it in the drawings of Salis or Huggett :/
Michael Steinmann
R51/3 1952
Engine Nr. 529466

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wa1nca
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Joined: Thu Sep 27, 2012 5:15 pm
Location: Ashfield Ma

splash ring

Post by wa1nca »

Yes splash ring
2nd pic is best
#1 in this diagram for R51/3
https://www.bmwclassicmotorcycles.com/p ... rt-one-26/

Same as #28 in this diagram for R50_R69s
https://www.bmwclassicmotorcycles.com/p ... nkshaft-2/
Also need #29 wave washer
The splash ring goes on the rear of the crankshaft oil seal, then the wave washer, then the flywheel

Tommy
Tommy Byrnes
54 R51/3 55 R50 64 R27 68 R69US

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Micha
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Joined: Fri Oct 12, 2007 2:24 am
Location: Israel

I'm speechless. Thanks!

Post by Micha »

I'm speechless.
Thanks!
Michael Steinmann
R51/3 1952
Engine Nr. 529466

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Micha
Posts: 374
Joined: Fri Oct 12, 2007 2:24 am
Location: Israel

Good evening,If I got it

Post by Micha »

Good evening,
If I got it right, the assembly order goes like this: main bearing, splash ring with its protruding side towards the bearing/motor, oil seal, wave washer.
Today at work (where I assemble the motor as I have all necessary stuff for it) I noted that I forgot to bring with me that splash disc so I could not proceed, though I took a look and I think that this splash ring will sit loose in there, as the oil seal is only 7 mm thick (Not to mention that the workshop manual claims to mount the oil seal in such a way that it will stand out 1 mm).
Is this correct? Should it be that way, loose inside? Or am I wrong, and it will be a tight fit? Or am I missing something?
I will only be there again at the beginning of the week.
Thanks for any input and have a nice weekend.
Michael Steinmann
R51/3 1952
Engine Nr. 529466

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Micha
Posts: 374
Joined: Fri Oct 12, 2007 2:24 am
Location: Israel

Correct way?

Post by Micha »

Good evening,
If I got it right, the assembly order goes like this: main bearing, splash ring with its protruding side towards the bearing/motor, oil seal, wave washer.
Today at work (where I assemble the motor as I have all necessary stuff for it) I noted that I forgot to bring with me that splash disc so I could not proceed, though I took a look and I think that this splash ring will sit loose in there, as the oil seal is only 7 mm thick (Not to mention that the workshop manual claims to mount the oil seal in such a way that it will stand out 1 mm).
Is this correct? Should it be that way, loose inside? Or am I wrong, and it will be a tight fit? Or am I missing something?
I will only be there again at the beginning of the week.
Thanks for any input and have a nice weekend.
Good evening,
If I got it right, the assembly order goes like this: main bearing, splash ring with its protruding side towards the bearing/motor, oil seal, wave washer.
Thanks for any input and have a nice weekend.

is this the correct way?
Michael Steinmann
R51/3 1952
Engine Nr. 529466

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malmac
Posts: 425
Joined: Sun Jun 29, 2014 2:10 am

here is the exploded view

Post by malmac »

I hope that image makes it quite clear.

The wave washer pushes against the flywheel and there should be a slight preloading of the spring. Therefore the splash ring is not lose.
If the crankshaft rear spacer is incorrect (too thin) then the splash ring might be lose or on the other hand (if too thick) the flywheel will not seat correctly on the taper and then all hell will break lose.


Mal
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mal - R69s
Toowoomba- Australia

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Micha
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Location: Israel

thanks

Post by Micha »

Thank you Mal, is it possible for you to confirm the way I think the spalsh ring should sit? -
splash ring with its protruding side towards the bearing/motor
Michael Steinmann
R51/3 1952
Engine Nr. 529466

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malmac
Posts: 425
Joined: Sun Jun 29, 2014 2:10 am

only my opinion

Post by malmac »

the splash ring can really only go in one way.

the splash ring is there to reduce the amount of oil that is splashing onto the oil seal after it has lubricated the rear main bearing. Or you could say it is there to help concentrate the lubrication of the rear bearing. Either way the part of the splash ring closest to the shaft has to sit neat against the side of the rear bearings inner race, followed by the wave washer which has the flywheel boss exerting an amount of sprung preload to keep everything from rattling. The outer circumfrence of the splash ring is then clear of the outer race of the rear main bearing and also should not foul the back of the main engine seal.

Mal
mal - R69s
Toowoomba- Australia

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