1951 G80s, Burman CP Gearbox...SUCCESS.

[Ralph]

Didn't realise you did not have the engine running,
think once you have it running the problem will go away.

[GrayKay]

with engine running and primary cover off is the clutch centre stationary and quiet when clutch is disengage, if yes its not the clutch
clutch basket has a thick and thin washer, see illustration 17 on page 46
thick one first on assembly otherwise basket will potentially rub on inner chain case

http://archives.jampot.dk/book/Owners_m ... Manual.pdf

No, so far the engine hasent run...
Just pushing the bike along the garage floor generates the crunchy noises.. as detailed in my notes above.
Good thoughts though, thanks.

[GrayKay]

Although I've had a couple of bikes with the CP 'box I've never had to delve inside them so I can only surmise.
However, upon further thought it occurs to me that I've read on the forum of several 'box issues after rebuild or parts replacement being due to incorrect end float of the shafts. This has generally been the result of using gaskets that were too thick or too thin, or using a liquid sealant instead of a gasket. You have replaced a seal and a bush and being down under and away from easy parts supply you may have made the gaskets yourself or used sealant instead.

"Down Under and Away..."
Cheeky bugger.. very self sufficient down here... and can have parts arrive from Steve Surbey in 7 to 10 days, no worries.
Shaft end float has been checked, and ok.. still have the original gasket on so good there..
Thanks for ideas...

[SPRIDDLER]

"Down Under and Away..."
Cheeky bugger.. very self sufficient down here... and can have parts arrive from Steve Surbey in 7 to 10 days, no worries.

Apologies, but one reads posts from those in the colonies ( ) about the difficulty and cost of getting AMC specific parts. My daughter in law comes from Busselton in WA and her father has often commented on the hassle to get parts for his classic British car.
I do admire your patience in not yet having started up the engine!
-

[GrayKay]

SUCCESS !!!!!

She runs again...
My CP gearbox issues are solved, I finished up replacing the Main Shaft with an old spare one...the only CP part I had to change... worked a treat.


The only difference in the two shafts, is the slightly longer shoulder on the upper one, this is the one I have now fitted...I think it held that cog (3rd gear ?) away from the sliding dog clutch... so all good.
I have done 80 miles this week on short runs, has a monobloc on and a bit fluffy low down, but great cruising at 50 mph... will fiddle until I get it ok.

Huge thanks for all the ideas and input, end result is a runner.
Cheers from Oz. Qld.

And big thanks to Spriddler for your post on How to add Images with Postimage... perfect.

[SPRIDDLER]

Brill!
Doesn't she look grand - just begging to be ridden.

[GrayKay]

Thanks Mr Sprid... she Pops along just Luvly...
Will be ridden lots, in Sams memory, and simply because she goes so well.

[Boundary795]

Gary, Before you blame the Gearbox - can you start the bike up with the outer PCC off? If so I would start the bike up and in neutral pull the clutch lever in and watch the clutch end plate if it 'wobbles', you have your answer. Not all clutch springs are the same and you may have to adjust them separately to get a paraallel clutch plate withdrawl at idle.