Author Topic: Triumph 500 Unit strange oil leak ?  (Read 349 times)

Online Angus

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Re: Triumph 500 Unit strange oil leak ?
« Reply #15 on: 12.07. 2019 08:23 »
plus one :)
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Online Rex

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Re: Triumph 500 Unit strange oil leak ?
« Reply #16 on: 12.07. 2019 16:26 »
So do I, where the engine and gearbox oil are separated.
I doesn't seem too matter too much where the engine and gearbox oils are mixed though... ;)

Online A10 JWO

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Re: Triumph 500 Unit strange oil leak ?
« Reply #17 on: 12.07. 2019 17:22 »
Am I right in thinking that the gearbox oil seal is fitted from the outside behind the clutch or inside prior to assembly of the gearbox. Thank you.

Online chaterlea25

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Re: Triumph 500 Unit strange oil leak ?
« Reply #18 on: 12.07. 2019 20:55 »
Hi A10JWO,
I think the seal can be changed without splitting the gearbox
Oil can and will leak out if the sprocket nut comes loose or even along the sprocket splines
later Triumphs have an O ring on the assembly to help stem the flow
Some sealant helps too
If the sleeve gear bush is worn where it goes through the sprocket inspection plate it will chew up the seal there

John


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Offline RDfella

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Re: Triumph 500 Unit strange oil leak ?
« Reply #19 on: 12.07. 2019 20:59 »
Those who use gear oil in their 'boxes, what grade do you use? EP90?
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Online Rex

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Re: Triumph 500 Unit strange oil leak ?
« Reply #20 on: 12.07. 2019 21:35 »
Am I right in thinking that the gearbox oil seal is fitted from the outside behind the clutch or inside prior to assembly of the gearbox. Thank you.

Outside prior to the clutch assembly. If you strip out the clutch assembly and remove the primary chaincase circular door and the gearbox sprocket it's usually possible to remove and replace this oil seal. Don't forget there's another smaller oil seal in the removable chaincase door.

Online A10 JWO

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Re: Triumph 500 Unit strange oil leak ?
« Reply #21 on: 12.07. 2019 22:45 »
Thanks lads, now a midweek job. Appreciate all replies.

Online Greybeard

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Re: Triumph 500 Unit strange oil leak ?
« Reply #22 on: 12.07. 2019 23:00 »
Those who use gear oil in their 'boxes, what grade do you use? EP90?
Yup

Online ironhead

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Re: Triumph 500 Unit strange oil leak ?
« Reply #23 on: 13.07. 2019 00:29 »
penrite 80w90
SA

Online A10 JWO

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Re: Triumph 500 Unit strange oil leak ?
« Reply #24 on: 13.07. 2019 15:49 »
To conclude ( I think ) I drained the gearbox which was full when I went out last time. Today I got an egg cup full out of the drain plug. New seal ordered. Will have to get some Gunk as well to remove the EP90 from the rear of the bike. Thanks for all replies.

Online A10 JWO

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Re: Triumph 500 Unit strange oil leak ?
« Reply #25 on: 24.07. 2019 16:03 »
Stripped the gear box completely, the leak was out of the blind bearing that pushes into back of the gearbox. Removed and refitted with sealer. I now have a happy gearbox. A few hours work for the sake of some sealant. Thread complete, I hope.