Author Topic: 1951 A7 gearbox rebuild  (Read 1229 times)

Offline anjimehra

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1951 A7 gearbox rebuild
« on: 07.11. 2013 05:52 »
Hi

Getting the gearbox parts together from aa heap of parts. The clutch thrust washer is missing. Any idea what the dimensions are for this. It's a split washer. Thanks
Anji
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Offline duTch

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Re: 1951 A7 gearbox rebuild
« Reply #1 on: 07.11. 2013 10:01 »
Hi Anj, you mean the thrust washer 67-3276/7/8 or the retaining collets/split rings/circlips that don't appear to be  listed in the parts books..?
  If you mean the collets, I think they're likely easy to make, or available from places like dragAnfly.....I bought some on eBay once but they never turned up

 Good luck
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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
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Online muskrat

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Re: 1951 A7 gearbox rebuild
« Reply #2 on: 07.11. 2013 11:34 »
Look here, http://www.a7a10.net/forum/index.php?topic=7709.0  #74 is part # 67-3251.
They wouldn't be too hard to make. Measure the width and depth of the groove in the shaft. They look to be a square section. Turn up a solid ring then cut in half.
Cheers
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'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
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Online trevinoz

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Re: 1951 A7 gearbox rebuild
« Reply #3 on: 07.11. 2013 21:24 »
I think that they are hardened.
Trev.
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Online muskrat

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Re: 1951 A7 gearbox rebuild
« Reply #4 on: 08.11. 2013 10:11 »
I wasn't sure Trev, but I think you are right. Although nothing spins on them they are taking the load of the nut torque (< that sounds like me).
Heat treating a set made from an old car axle might work.
Cheers
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'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
Australia
Muskys Plunger A7

Offline anjimehra

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Re: 1951 A7 gearbox rebuild
« Reply #5 on: 13.01. 2014 07:08 »
Hi

Just put together the bits & pieces of the gearbox that came with the dismantled bike & find end float on both the main & lay shafts. Parts all seem to be there but the float is definitely more than on my 1952 Flash. Any ideas on how to proceed. Where do I fit the shims in case that is the way out
Thanks
Anji
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Offline anjimehra

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Re: 1951 A7 gearbox rebuild
« Reply #6 on: 13.01. 2014 07:11 »
Thanks Muskrat, Trevinoz & Dutch. I remember now making one for the 52 Flash & its working fine
Anji
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Re: 1951 A7 gearbox rebuild
« Reply #7 on: 13.01. 2014 08:38 »
G'day Anji.
Are you sure you fitted #87 on the layshaft, and #101 & 102 on the mainshaft?
#'s 84 & 88 bushes may be worn on the thrust faces.
Cheers
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'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
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Muskys Plunger A7

Offline a10gf

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Re: 1951 A7 gearbox rebuild
« Reply #8 on: 13.01. 2014 10:32 »
A large gearbox scan > http://www.a7a10.net/forum/index.php?topic=3303.0

(& merged related topics, renamed title)
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Offline anjimehra

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Re: 1951 A7 gearbox rebuild
« Reply #9 on: 13.01. 2014 16:11 »
A large gearbox scan > http://www.a7a10.net/forum/index.php?topic=3303.0

(& merged related topics, renamed title)

Hi a10gf

Great hearing from you. The Flash is going great guns Thanx to you & we do regular 400 km weekend runs on her. Thanks for the site for the gbox.

How are you keeping health wise now. Hope you are feeling better. Take care
Anji
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