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Removing the sleeve gear bush #621254 10/10/15 6:29 am
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brettsyoung Offline OP
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Hi all. The sleeve gear bush - the one inside the shaft from the gearbox to the drive sprocket - is doing my head in. I need to remove them both to replace but I cannot budge it. I have been belting it pretty hard, and the inside one is moving but the outside not. Is there something I should be aware of? I don't want to go too crazy on it - just heat perhaps? cheers Brett

Now had it very hot from the oven and still no joy. Worried there's a lip or something stopping it.

Last edited by brettsyoung; 10/10/15 7:48 am.
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Re: Removing the sleeve gear bush [Re: brettsyoung] #621269 10/10/15 8:32 am
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kommando Offline
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It would help if you said which bike you were working on just in case there is a wrinkle needed, but generally the bushes are a press fit and to get them out if the vice and well fitting stepped drift do not force them out then cutting a slot in the bush will allow them to be collapsed and then pulled out easily. The oven won't work on the bushes, if they are steel they expand at the same rate and if solid bronze type they do not expand much differently to reduce the pressure. To get them back in you need to use the stepped drift and a good solid vice again.

Re: Removing the sleeve gear bush [Re: brettsyoung] #621281 10/10/15 9:23 am
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brettsyoung Offline OP
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Yeah sorry 66 Thunderbolt, but my three different year A65s are all the same (except the 66 has two separate rather than one single long bush). But thanks for that, you've answered my question. I'll cut a slot and go from there. cheers Brett

Re: Removing the sleeve gear bush [Re: brettsyoung] #621376 10/11/15 8:19 am
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Elijah Offline
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Chuck it in the lathe & bore it out.

Re: Removing the sleeve gear bush [Re: kommando] #621377 10/11/15 8:52 am
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Allan Gill Offline
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Originally Posted by kommando
It would help if you said which bike you were working on just in case there is a wrinkle needed, but generally the bushes are a press fit and to get them out if the vice and well fitting stepped drift do not force them out then cutting a slot in the bush will allow them to be collapsed and then pulled out easily. The oven won't work on the bushes, if they are steel they expand at the same rate and if solid bronze type they do not expand much differently to reduce the pressure. To get them back in you need to use the stepped drift and a good solid vice again.


+1, you will also need a reaming tool to size it correctly.

I cut a slot with a hacksaw then collapsed them so they just fell out.

Don't press the two bushes butt to butt, there should be a gap between them.


beerchug
Re: Removing the sleeve gear bush [Re: Allan Gill] #621418 10/11/15 4:01 pm
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GS DAVE Offline
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+1 acts as an oil reservoir for the plain bushes..

Re: Removing the sleeve gear bush [Re: GS DAVE] #621458 10/11/15 9:09 pm
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John Goodwin Online Content
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I bought a used gearbox from the wreckers and they'd been heavy handed removing the high gear from the cases and burred the bush that runs in the oil seal in the primary side.
I ground down an old T160 exhaust valve that was kicking around to just fit inside the bush. I made one half of the head the approximate id of the actual high gear, the bit between the two bushes.
I supported the high gear in soft jaws in the vice. Then just proceeded to tap out the buggered bush.
There was no need to slot the bearing, didn't need heat. Very straightforward job. I could have made the drift from a bolt but chose the old valve for the tougher material.


Current: 2 x 1966 A65S, 1 x 1967 A65SA, 1 x 69/70? A65LA space Y, 1 X D14/4 & 1 x B175
Past: 4 x 1976 T160V, 1 74/5 T150V, 83 model GSX 750 ESD, Z650, Katana 1100(Bathurst Model), 79 T140V, 70's TR6, 2 x 1971 BSA 250 Gold Stars, 50's 350 Goldie, A65 Spitfire semi basket case, 1965/6? A65 LC, Tiger 21 350 & a D14/4 Bantam, 175 Bridgestone Twin with Zimmerman discs!

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