Grey gearbox oil

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Grey gearbox oil

Postby Ells » Wed Mar 16, 2016 6:21 pm

Just started to drain the gearbox oil. I have had the bike running three times in last couple of days so its still last years oil. As it is coming out its the colour of fresh concrete. I assume this means that water has got in with the oil and some seal has gone. Is there an alternative explanation?
Any likely suspects for where the leak is?

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Mark
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Re: Grey gearbox oil

Postby Malc » Wed Mar 16, 2016 7:57 pm

Concrete coloured?! Water in the oil tends to look more like cappuccino or latte (or Nescafe for us less soffistucated geezers).

If you're right about the water/oil mix Mark, it's a relatively easy job to change the water pump seal. Remove the clutch cover, remove the impeller, whip out the old seal and drift a new one, refit impeller and casing. One hour if you dawdle.
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Re: Grey gearbox oil

Postby Ells » Wed Mar 16, 2016 8:57 pm

just run through some fresh oil and it came out the same. Its the grey of wet concrete. Looks like a normal oil seal thingy. Looks like a job for tomorrow afternoon.

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Re: Grey gearbox oil

Postby Ells » Wed Mar 16, 2016 9:27 pm

So are we talking part number 93103-10147?

From memory when you pull the clutch casing off this will still be attached to the casing. So if I have a spare engine I could just swap the clutch covers?
Would I also need 1KT-14228-00 the gasket for the housing cover?


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Re: Grey gearbox oil

Postby Malc » Thu Mar 17, 2016 7:33 am

Changing covers is the quick and easy way, yes. Your oil seal part number is correct, but I have 1KT-15461-00 for the clutch cover gasket.

Edit - yes, I see what you've done. You'll need to replace gasket 1KT-12428-00 when the impeller is removed.
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Re: Grey gearbox oil

Postby Ells » Thu Mar 17, 2016 12:49 pm

Looks like I may want to swap the impeller. When it came out it came out with a little rubber ring and a small spring (the springy bit from the seal).
The impeller shaft is not smooth it is raised and rough so that's probably why the seal has gone.

So bit more to replace than I expected.

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Re: Grey gearbox oil

Postby ypm76 » Fri Mar 18, 2016 3:44 pm

you'll need to replace the impellor and the water seal otherwise the shaft will rip the new seal straight away.

There's an easy way to fit a new seal using the old one, I'll show you at Donny.

Depending on your oil the colour can be white, cream, grey or 'minty buff' :)
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Re: Grey gearbox oil

Postby Ells » Fri Mar 18, 2016 5:41 pm

Cheers Kev,
I had a look through my spares and found an impeller that is nice and smooth. Fingers crossed the seal and impeller will be going in Saturday \ Monday depending on the Postie.

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Re: Grey gearbox oil

Postby Ells » Sun Mar 20, 2016 1:18 pm

How the hell do you get the old seal out??? I have tried levering with a screwdriver, paused and sprayed some WD40 on it. It does not feel like its going to move. Think Monday will be take a trip to friendly bike shop :D

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