BSA Owners' Club Workshop Discussions

The BSA Workshop => Twins => Topic started by: chrisx1 on 01 Jun, 2023, 14:59

Title: Cush drive
Post by: chrisx1 on 01 Jun, 2023, 14:59
 Can anyone tell me how to fit a square peg in a round hole?
Sorry I meant how do you reassemble the clutch centre after replacing the new rubbers.
I guess you fit the three larger rubbers first, then insert the spider, but then how do you fit the three smaller rubbers?
With difficulty comes to mind but I really need some help here?
Title: Re: Cush drive
Post by: Spaceman on 01 Jun, 2023, 15:15
BSA recommends using a lubricant to make refitting easier - liquid soap is recommended although the B40WD manual also suggests hydraulic fluid can be used. It should be possible to compress the rubbers that have already been fitted if necessary by levering the spider against the clutch centre.
Title: Re: Cush drive
Post by: Ian C on 01 Jun, 2023, 16:37
Best way I find is to locate the Clutch hub in a vice (with something through the holes in the flange or even a dummy mainshaft that has been ground to have two flats for the vice jaws 'don't forget the key though') then drop the cush drive onto it, then using a clutch locking tool with a handle fitted you push against the handle whilst 'easily' dropping in the remaining rubbers.. HTH
Title: Re: Cush drive
Post by: chrisx1 on 01 Jun, 2023, 22:08
Anyone got an old main shaft?
Title: Re: Cush drive
Post by: cdsdorset on 02 Jun, 2023, 09:27
I just use a piece of flat bar with a notch in each side insread of a shaft.
Title: Re: Cush drive
Post by: chrisx1 on 02 Jun, 2023, 16:52
I'm trying to visualize it. Do you sit the clutch centre on top of the flat bar which I presume you have locked in a vice ?
Title: Re: Cush drive
Post by: cdsdorset on 03 Jun, 2023, 08:27
Yes. Put the bar in the vice upright and drop the centre over it.
Title: Re: Cush drive
Post by: DAVE BRADY on 03 Jun, 2023, 10:16
Hi,

The clutch locking tool can simply be a plain plate and a friction plate bolted together and if needed a bit of flat bar as a handle as Ian suggested.

Dave.
Title: Re: Cush drive
Post by: chrisx1 on 05 Jun, 2023, 08:10
Ok I will have a look at the flat bar method. Thanks guys.