Gear box oil seal

Information relating to the Matchless G11 or AJS Model 30 600cc twin
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Re: Gear box oil seal

Postby 1608 » Thu Oct 13, 2016 9:50 am

Hold on John, there should be a steel kick start shaft bush accessible on the inside of the outer cover. Gently warm the outer case and drive the bush out. Replace the seal and then the bush.

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Re: Gear box oil seal

Postby John Grew » Thu Oct 13, 2016 1:10 pm

I got the seals and new shaft from Steve at AMC spares so it is all a little confusing. The only unknown is the case and this is coming off `again` just as soon as I have the time.
John

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Re: Gear box oil seal

Postby Mick D » Thu Oct 13, 2016 1:23 pm

Hi

My experience with Steve is that the guy is a wealth of information - may be worth giving him a quick call to discuss the parts you have.

Regards Mick

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Re: Gear box oil seal

Postby John Grew » Thu Oct 13, 2016 4:44 pm

The `new` bits came from Steve at AMC spares but the only thing which is an unknown at the moment is the case. It all came to me in bits so it could have been got at although it all looks ok. I will have it apart ASAP and let you know

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Re: Gear box oil seal

Postby John Grew » Thu Oct 13, 2016 6:39 pm

Hi Mick D.
re: Steve at AMC. He was good enough to email me re the problem . As you say he is a wealth of information and very nice guy as well

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Re: Gear box oil seal

Postby John Grew » Fri Oct 28, 2016 8:18 am

Sorry for the delay on my update, but a holiday got in the way. Ho Hum!. What you need to stop it leaking is an oil seal from a Commando and a mate with a milling machine to take the case out to fit the seal. So far it has only stood over night but it all looks good at the moment , so fingers crossed that it is now sorted. Thanks to every body who showed interest.

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Re: Gear box oil seal

Postby 1608 » Fri Oct 28, 2016 4:25 pm

There shouldn't be any need for a milling machine as the kickstarter bush on the inside of the outer case is removeable, was on mine anyway. AMC gearbox exploded drawing shows the removeable bush. And if its not too late, worth wrapping some insulating tape round the splined shaft to prevent damaging the new seal when replacing the outer cover.

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Re: Gear box oil seal

Postby John Grew » Sun Oct 30, 2016 7:44 pm

I did look at doing it that way but my mate was champing at the bit to use his milling machine and it is all good news as I have managed to get in some 80 odd miles this weekend and all is very well in that dept: I think that by doing it from the inside you would still have to do some machining at the old seal has a smaller O.D. than the new one. Anyway it is done now.
I used the feeler gauge method when fitting the case I.E. slid in a 3 thou feeler at the right time and gently move it round. I was shown that method when I started work some 62 years ago and it still works for me.
So, a big thank you to all that took the time to add their two pence worth
regards
John Grew

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