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Crankshaft shims
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Topic: Crankshaft shims (Read 1231 times)
v8ivor
A's Good Friend
Join Date: Apr 2015
Posts: 112
Karma: 2
Crankshaft shims
«
on:
21.12. 2015 20:59 »
Hi again,
I want to assemble the crankshaft cush drive sprocket and I can see a 5 thou shim and a 67-1239 shim with two cut outs in a parts diagram. I don't know what they do but does any one know if all 1952 engines should have these fitted ?
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chaterlea25
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Join Date: Jun 2009
Posts: 4020
Karma: 54
Re: Crankshaft shims
«
Reply #1 on:
21.12. 2015 21:33 »
Hi,
Shims are added if required to correct the sprocket to clutch alignment
HTH
John
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1961 Super Rocket
1963 RGS (ongoing)
v8ivor
A's Good Friend
Join Date: Apr 2015
Posts: 112
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Re: Crankshaft shims
«
Reply #2 on:
21.12. 2015 21:48 »
Oh, thanks John, what about the one with the two cut outs/notches ?
Ivor.
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morris
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Antwerp, Belgium
Re: Crankshaft shims
«
Reply #3 on:
21.12. 2015 22:31 »
Am I correct in assuming you got part number 67-1239 from the Draganfly catalogue? I think it may be from a later model.
My 1947-53 parts list doesn't show this shim/spacer and I can't remember having seen it on my plunger either. Did have to ad some shims to get a correct alignment
It will depend on the alignment of both your sprockets if you need it or not I guess.
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'58 BSA A 10 SA
'52 BSA A 10 Plunger
'55 MORRIS ISIS
The world looks better from a motorbike
Belgium
v8ivor
A's Good Friend
Join Date: Apr 2015
Posts: 112
Karma: 2
Re: Crankshaft shims
«
Reply #4 on:
21.12. 2015 23:00 »
Yes Morris, you are exactly right. I was just worried that it was something to do with keeping the oil in the crankcase, because I wondered why 67-1239 was that shape rather than the other plain looking shim.
Ivor.
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muskrat
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Lithgow NSW Oz
Re: Crankshaft shims
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Reply #5 on:
22.12. 2015 19:47 »
G'day Ivor.
That is the "oil slinger" to try and stop oil passage into the primary. The sprocket alignment shims go outside of this.
Cheers
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'51 A7 plunger, '57 A7SS racer now a A10CR, '78 XT500, '83 CB1100F, 88 HD FXST, 2000 CBR929RR ex Honda Australia Superbike .
Australia
Muskys Plunger A7
metalflake11
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Join Date: Aug 2012
Posts: 678
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Re: Crankshaft shims
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Reply #6 on:
22.12. 2015 20:51 »
Does anybody know how many parts there are in an A10 engine?
Sorry to be off topic.
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England N.W
1960 A10
England
v8ivor
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Posts: 112
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Re: Crankshaft shims
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Reply #7 on:
22.12. 2015 22:42 »
Thanks Muskrat, Looking at my photo, can I fit the oil slinger now that the cases are assembled ?
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trevinoz
Newcastle, N.S.W. Australia.
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Re: Crankshaft shims
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Reply #8 on:
22.12. 2015 22:55 »
I think that you will find that the slinger has to be fitted before the outer main outer race.
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v8ivor
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Re: Crankshaft shims
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Reply #9 on:
23.12. 2015 00:17 »
That's what I was afraid of. I don't know what the consequences would be if I don't fit one ?
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muskrat
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Lithgow NSW Oz
Re: Crankshaft shims
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Reply #10 on:
23.12. 2015 19:06 »
Just keep your eye on the primary oil level. After a ride pull the screw and see how much excess drains off. Won't be much.
Cheers
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'51 A7 plunger, '57 A7SS racer now a A10CR, '78 XT500, '83 CB1100F, 88 HD FXST, 2000 CBR929RR ex Honda Australia Superbike .
Australia
Muskys Plunger A7
v8ivor
A's Good Friend
Join Date: Apr 2015
Posts: 112
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Re: Crankshaft shims
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Reply #11 on:
23.12. 2015 22:09 »
Thanks again Muskrat, even when the shock absorber sleeve is tight against the inner main bearing race, the sprockets line up without any shims or oil slinger, maybe that's why they were left off ?
Ivor.
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The BSA A7-A10 Forum
»
Technical (Descriptive Topic Titles - Stay on Topic)
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A7 & A10 Engine
»
Crankshaft shims