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This is my first time changing the gearbox sprocket on my 1945 M20. The old one is worn with pointed teeth and it slipped easily off of the output shaft. When installing the new one, it is very tight and barely exposes the first thread of the shaft and won't travel further onto the shaft. I bought this from Les at Russell Motors and certainly trust him. Do I need to 'rubber mallet' it on?
Thank you in advance.
Personally I would try and relieve the splines in the sprocket a bit, maybe with a tiny stone in a Dremel or something. I expect a file will just slide off. Ron
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Thank you Ron and Trevor. I've got some work to do this next week!!
Found the issue. The outer diameter of the section of the cog that fits into the gearbox is 1 mm larger diameter than the old one. Any recommendations on a source for a NOS cog?
I remember having a similar problem but I had another sprocket so didn't follow up on the problem.
I think it may have something to do with the later boxes having oil seals and the sprocket may be for one of those boxes.
Anyone with more knowledge out there?
If you have a lathe with soft jaws you could turn it down to size.
I may have a suitable sprocket...I'll take a look tomorrow...Are you fitting the standard number of teeth?...
Mail me off forum this evening to remind me...I'm in that age group!!:laughing: ....Ian
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