OJCar
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- Thread starter Cato
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Cato
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OJCar
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Cato
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Indeed, it's leaking oil from the gearbox output shaft seal. That may or may not actually be gearbox oil.Leaking Engine Oil from the Gearbox?
Shurely shome mistack?
It's also leaking from a number of other places but once the oil's stopped flowing from the output shaft seal which is the main source I'll be able to see how much and hopefully from where.
EngineGearbox oil, from the output shaft seal which is behind the sprocket, which is behind the cover plate, which is behind the drive dog, which is behind the clutch basket which is behind ... well you get the idea.
If you keep going you will be at the other side of the engine!
I think it should be engine oil in the primary chaincase, there may be breather holes drilled into the crankcase behind the rotor as well.
Yes I know! I used to own a T150 and T110 preunit crankcases!EngineGearbox oil, from the output shaft seal which is behind the sprocket, which is behind the cover plate, which is behind the drive dog, which is behind the clutch basket which is behind ... well you get the idea.
Seadog
Save the planet. It's the only one with rum!
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There is no seal between gearbox and primary.Indeed, it's leaking oil from the gearbox output shaft seal. That may or may not actually be gearbox oil.
It's also leaking from a number of other places but once the oil's stopped flowing from the output shaft seal which is the main source I'll be able to see how much and hopefully from where.
The seal in the backplate prevents oil leaking from the primary.
The sleeve gear bush is, in effect, the seal.
Cato
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I didn't say there was?
There's a seal on the output shaft behind the sprocket. Oil leaking from there drops to the ground between the back of the primary case and the main body of the case. In this instance it's flowing out at quite a rate, presumably with the bike having stood for so long the old rubber will have dried out, hardened up and then crumbled.
Cato
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The dismantling did have a secondary benefit as the clutch basket pillars are well worn into ridges, the plate dogs are worn accordingly, and the liberal application of copper slip has made the plates unusable. So that lot will be getting sorted while I'm in there.If you keep going you will be at the other side of the engine!
cheb
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Have you considered starting from the other side?EngineGearbox oil, from the output shaft seal which is behind the sprocket, which is behind the cover plate, which is behind the drive dog, which is behind the clutch basket which is behind ... well you get the idea.
Cato
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It's not too bad TBH, just a lot of unbolting. It does make very clear how poor the design was and how easy they made it for the Japanese manufacturers to take over and dominate.
oldbikedavey
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Hopefully, anyway....
Farside
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It's seeing things like that make me glad I bought an XS650.
They've got their own troubles, though.
Cato
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I do like an XS, one of the Japanese bikes giving the British manufacturers a bloody nose in the early days. How different things would have been if BSA, Norton or Triumph could have produced something like the XS650.
Farside
Badly Welded Man
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Bert Hopkins (iirc) and his modular engine. Anything from a 175cc single to a V5.
That would have been something.
