Absolutely fascinating stuff thanks for the invaluable info, gonna be doing the gearbox on my 68 soon so will be great to check all this out thanks for sharing never stop learning that’s for sure.
Ashley, well I guess I will have to pay you a pound, but could you please explain why the bushing(s) slide in the gear(s) and not an interference fit? I would suspect that the gear(s) are heat-treated completely (not just the teeth), so maybe it is ok to let the bushing rotate within the bore of the gear? Or possibly, when a bush is pressed in, there would have to be a secondary step to ream the bush to "fit" (in our world that can sometimes be true). By allowing a sliding fit would eliminate this step in the assembly process? I would appreciate your detailed reply on this as other would I suspect. Thank you! Mark
Had a chat with Ash and he says "I suspect it is to do with the design and a combination of the fact that both the gear and shaft can rotate independent of each other and ease of maintenance / assembly. It may also be more aligned with that they needed more oil between the gears and shaft at these points, and the drillings in the gears and bushes allow a plenty full of oil to actually get to the shaft / inner bush interface."
Very good , been revising my Andover shopping cart for 6 months now. My 70 Commando S is a rolling rusty basket and needs alot. A little overwhelming but I will do it.
Absolutely fascinating stuff thanks for the invaluable info, gonna be doing the gearbox on my 68 soon so will be great to check all this out thanks for sharing never stop learning that’s for sure.
Everyday is a learning day
Ashley, well I guess I will have to pay you a pound, but could you please explain why the bushing(s) slide in the gear(s) and not an interference fit? I would suspect that the gear(s) are heat-treated completely (not just the teeth), so maybe it is ok to let the bushing rotate within the bore of the gear? Or possibly, when a bush is pressed in, there would have to be a secondary step to ream the bush to "fit" (in our world that can sometimes be true). By allowing a sliding fit would eliminate this step in the assembly process? I would appreciate your detailed reply on this as other would I suspect. Thank you! Mark
Had a chat with Ash and he says "I suspect it is to do with the design and a combination of the fact that both the gear and shaft can rotate independent of each other and ease of maintenance / assembly. It may also be more aligned with that they needed more oil between the gears and shaft at these points, and the drillings in the gears and bushes allow a plenty full of oil to actually get to the shaft / inner bush interface."
Very good , been revising my Andover shopping cart for 6 months now. My 70 Commando S is a rolling rusty basket and needs alot. A little overwhelming but I will do it.
Me too with an 850 interstate, who's last USA owner abused it!
Good luck!
Good luck with that, you'll get there in the end.