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Loosing clutch fluid-How many miles on a seal
Posted: Mon Nov 14, 2011 3:23 pm
by old git
So, I replaced the slave cylinder seal about 7K-8K miles ago with a new aprilia seal.
Noticed that the fluid level now drops ever so slightly over a period, seems to be weeping from the hole in the bottom of the slave cylinder.
How often should these things need replacing, is around 10K miles about right, if so I will just get a new seal & swap it out, but if they should last for 20K - 30K miles then maybe I need to be looking for another cause of excessive wear.
Ta muchly.
Posted: Mon Nov 14, 2011 4:52 pm
by flatlander
depends on the condition of the seal I suppose I mean are we talking a young healthy seal or one of those cute little white ones? ... igmc
Oh you said CLUTCH fluid I thought you meant .... and a horse would be better
Posted: Mon Nov 14, 2011 5:08 pm
by D-Rider
Sounds like a new seal is in order and also an investigation as to why it's leaking so soon. I'd be expecting more from it than you seem to be getting.
Posted: Mon Nov 14, 2011 7:44 pm
by old git
Ok so checked mileage and is actually just over 10K miles since the last clutch seal swap.
If this is not enough miles & I am investigating, what am I looking for??
Posted: Mon Nov 14, 2011 8:07 pm
by D-Rider
Well, in my view, it ought to last longer than that.
I guess you could:
- Check it was fitted OK (not suggesting any lack of skill on your part BTW but we all have the occasional mishap or something gets a little displaced on assembly without being spotted)
Look for any rough surfaces on the moving parts.
Check for the presence of abrasive crud in that area.
Posted: Mon Nov 14, 2011 8:50 pm
by anzacinexile
A lot of people forget the seals is only one part of the equation. The second is the condition of the bore. It MUST be like a mirror in there, anything else will destroy a seal in sparrow fart time
Posted: Mon Nov 14, 2011 9:05 pm
by blinkey501
I agree everything needs to be clean on re assembly, and no scores or burrs on the piston itself
Posted: Tue Nov 15, 2011 11:32 am
by irich
blinkey501 wrote:I agree everything needs to be clean on re assembly, and no scores or burrs on the piston itself
I third that. I've had hydraulic leaks due to scored bores from dirt in the system. Hydraulics need to be clean.
Posted: Tue Nov 15, 2011 12:03 pm
by D-Rider
irich wrote:blinkey501 wrote:I agree everything needs to be clean on re assembly, and no scores or burrs on the piston itself
I third that. I've had hydraulic leaks due to scored bores from dirt in the system. Hydraulics need to be clean.
On a technicality, you "fourth" that .... adding even more weight to the advice
Posted: Tue Nov 15, 2011 6:54 pm
by Nooj
Over 30,000 miles on the original seal with no issues yet.
Posted: Wed Nov 16, 2011 8:31 am
by anzacinexile
Nooj wrote:Over 30,000 miles on the original seal with no issues yet.
Yeah but you don't use the clutch do you