The BSA A7-A10 Forum
Technical (Descriptive Topic Titles - Stay on Topic) => Gearbox, Clutch, Primary => Topic started by: stev60 on 16.10. 2017 19:01
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Because of excessive noise from clutch have found that the thrust wosher and collets were missing, managed to get collets but not the thrust, can some one give me a description of one, is it possible to make one or something that could replace it
Steve
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Model 51 A7 six spring clutch it looks to me, like its just a spacer, but must apply some sort of pressure
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Hi Stev
The thrust washer has a recess on the inner side that retain the collets in place
Be careful a smaller one is fitted to C11G and C12 models
John
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They originally came in three different thicknesses, but not sure where that measurement applies;
I think you won't have much choice of thickness.
I have a profile drawing of one somewhere
67-3276 (0.122"- 0.126")
67-3277 (0.138"- 0.140")
67-3278 (0.148"- 0.150")
The Collets/ 'Thrust washer abutment Ring' /halves is # 67-3251.
They could be made from the right material if you got stuck.
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Looking a bit dumb here, I do have the thrust wosher, just the collets missing, I thought there may have been another part as there seems to be a a large amount of float on the sprocket, hopefully this will be taken up when collets are in place
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.........hopefully this will be taken up when collets are in place
Fair chance *eek*
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spot on dutch, its working perfectly no noise, no clunking gear change,
the float on the chain wheel is as it should be, when I put the new clutch plates in, I didnt go past the that thrust wosher, but someone before me had , and left a few bits out, what im learning is there has always been someone doing something before you, its a good learning curve
Steve
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G'day Steve.
Your lucky to escape without major damage. Without the collets the whole unit can float around like a "richard" in a shirt sleeve *eek*.
All previous owners should be hung drawn and quartered, then shot. I rebuild anything that looks like it had been touched by one.
Cheers
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Possibly I should be included in the being shot mob, I should have gone that one step further, I actually didnt realise they were there, until the noise made me look again and noticed the excessive float on the chainwheel Il claim ignorance as a defence *smile*
Steve