B52 Gearbox - Gear the wrong way round

Information relating to the Matchless G80 or AJS Model 18 500cc Heavyweight.
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spookefoote1956
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B52 Gearbox - Gear the wrong way round

Post by spookefoote1956 »

Burman Gearbox.gif
Hello again. I am having a little issue with by GB gearbox. This delightful exploded view from the lovely people at Draganfly shows Gear 3648-52 with the five holes facing outwards. I am convinced that it should be facing the other way as the holes should be able to mesh with the five bumps on the gear behind it 3652-52.

So am I right or wrong as I don't want to chuck a gasket and goo on just to have to rip it off again.

Cheers and safe riding, Chris
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clive
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Re: B52 Gearbox - Gear the wrong way round

Post by clive »

First comment, the illustrated gearbox is for an ariel, It has a different case and the fittings for a gearbox mounted speedo drive. Second comment If the holes don't go all the way through then yes they have to be able to engage with the sliding gear.
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Duncan
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Re: B52 Gearbox - Gear the wrong way round

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Pharisee
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Re: B52 Gearbox - Gear the wrong way round

Post by Pharisee »

From memory, the holes in that gear go all the way through. The gear is recessed on the other side and the mating gear (3652-52) sits partially inside the recess when the gears are meshed. You can just make out the recess in this photo.

Image

[EDIT]... Thinking about it a bit more. The holes don't go all the way through, they are blind holes drilled from the recessed side for the mating gear.
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Mick D
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Re: B52 Gearbox - Gear the wrong way round

Post by Mick D »

Hi

Clean off the gear, there will be 'witness' marks, (wear), which will indicate which way it was assembled in use.

Regards Mick
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