Author Topic: Speedometer drive removal / fitting query ?  (Read 851 times)

Offline Stephen Foster

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Speedometer drive removal / fitting query ?
« on: 30.10. 2012 20:44 »
The speedo drive in My gearbox is wearing out & I have a new one fitted in a spare outer cover .
I would like to remove this drive & fit it into My good outer cover .
Has Anyone any experience in this procedure please ?

I cant find any locating dowel , etc so I imagine heat may be required ?

Thank all .

Steve...
I own a 1955/56 B.S.A Swinging Arm "Golden Flash" , had it since 1976 .

Online trevinoz

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Re: Speedometer drive removal / fitting query ?
« Reply #1 on: 30.10. 2012 20:49 »
Steve,
                There is a screw through the outer cover with a reduced diameter which locates the drive. It has to be removed first.
I remove the drive by slipping a sleeve or washers over the thread and tighten the nut, progressively adding washers as the drive is withdrawn.

Trev.

Offline Stephen Foster

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Re: Speedometer drive removal / fitting query ?
« Reply #2 on: 31.10. 2012 05:23 »
Thanks Trev ,
I will try that later ...was concerned regarding using heat in case there may be an oil seal around the drive ?

Steve ..
I own a 1955/56 B.S.A Swinging Arm "Golden Flash" , had it since 1976 .

Offline duTch

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Re: Speedometer drive removal / fitting query ?
« Reply #3 on: 31.10. 2012 09:05 »

 Steve, maybe not all have an 'O' ring,but mine does, but shouldn't matter just replace it anyway.

 
Started building in about 1977/8 a on average '52 A10 -built from bits 'n pieces never resto intended -maybe 'personalised'
Have a '74 850T Moto Guzzi since '92-best thing I ever bought doesn't need a kickstart 'cos it bump starts sooooooooo(mostly) easy
Australia

Offline Stephen Foster

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Re: Speedometer drive removal / fitting query ?
« Reply #4 on: 31.10. 2012 18:26 »
Trev ,
Tried the method advised by Yourself without using heat ..the drive is loose enough but spins in the case when I tighten the nut with the applied washers , My question now is would I be better applying heat & if so how much is enough ? also would I be able to get enough with a propane torch ?

Thanks in advance ,
Steve ..
I own a 1955/56 B.S.A Swinging Arm "Golden Flash" , had it since 1976 .

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Re: Speedometer drive removal / fitting query ?
« Reply #5 on: 31.10. 2012 21:38 »
If it was me, Steve, I would make an adapter for my sliding hammer and gently impact it out.
Can you fit the nut and hold it in a vice and tap the cover off?

Trev.

Offline Stephen Foster

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Re: Speedometer drive removal / fitting query ?
« Reply #6 on: 01.11. 2012 04:32 »
Thanks again Trev ..I will try that later Today .

Best Wishes,
Stev ..
I own a 1955/56 B.S.A Swinging Arm "Golden Flash" , had it since 1976 .

Offline Stephen Foster

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Re: Speedometer drive removal / fitting query ?
« Reply #7 on: 01.11. 2012 08:05 »
Trev ,
Id like to report complete success following Your suggested method plus minimal heat .

Thanks once again ,
Steve ...
I own a 1955/56 B.S.A Swinging Arm "Golden Flash" , had it since 1976 .

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Re: Speedometer drive removal / fitting query ?
« Reply #8 on: 01.11. 2012 21:16 »
We aim to please!   *smile*

Trev.