Ducati Monster Forum

Moto Board => Tech => Topic started by: Artful on August 03, 2010, 07:36:23 AM

Title: Oil leak at slave cylinder, suggestions?
Post by: Artful on August 03, 2010, 07:36:23 AM
As stated in the title, I have a slight oil leak around the slave cylinder on my 695. I pulled the cylinder and everything looks kosher, pushrod o-rings are in place and intact, red o-ring on the slave is intact and looks normal. Cleaned the mating surfaces, put it all back together, still leaking.

Is it common for those o-rings to be deformed but not visibly, as in pushed flatter than spec without being visibly damaged?

Also, I think this is my first post on this board, hi y'all. I've been on what is apparently referred to as "the old board" for years, and am really frustrated with the limited tech knowledge over there. If I need advice on buying the newest SpeedyMoto bling I'll still go there, but I'm hoping the tech knowledge base has moved here as well.
Title: Re: Oil leak at slave cylinder, suggestions?
Post by: Speeddog on August 03, 2010, 08:55:32 AM
There's one sidecover screw behind the slave cylinder, make sure that's tight.

Might as well replace the O-rings on the pushrod, they're cheap.
Title: Re: Oil leak at slave cylinder, suggestions?
Post by: Artful on August 03, 2010, 09:03:51 AM
Roger, that screw would never have been fiddled with, but after riding a '77 Sportster for a decade, I know how bolts like to work their way out over time through nothing more than sheer determination. I'll check it. Any tips on how to pull that whole contraption without losing all the liquid gold Amsoil I just put in there short of draining the system? I leave for the Tail tomorrow morning. The leak is absolutely tiny, so it "doesn't hurt the runnin' of it none".
Title: Re: Oil leak at slave cylinder, suggestions?
Post by: IdZer0 on August 03, 2010, 09:19:29 AM
Are you sure it's the slave cylinder that's leaking? With my bike the at a certain moment the push rod started leaked oil after every ride and dripped down the side stand. You can easily pull the push rod out and see if the the two o-rings are still intact. Mine got chewed up resulting in the leakage.
Title: Re: Oil leak at slave cylinder, suggestions?
Post by: Artful on August 03, 2010, 10:10:23 AM
Quote from: IdZer0 on August 03, 2010, 09:19:29 AM
Are you sure it's the slave cylinder that's leaking? With my bike the at a certain moment the push rod started leaked oil after every ride and dripped down the side stand. You can easily pull the push rod out and see if the the two o-rings are still intact. Mine got chewed up resulting in the leakage.

...

100% sure it isn't the slave leaking, it's definitely motor oil like I said in the first post. Figured it was the o-rings but when I pulled the rod they looked pristine. I'll replace them and see what happens.
Title: Re: Oil leak at slave cylinder, suggestions?
Post by: jerryz on August 04, 2010, 04:03:04 AM
The engine oil indicates the oil seal Orings on the push rod they are little buggers as the dont seem to last long but its a minor problem.
Title: Re: Oil leak at slave cylinder, suggestions?
Post by: mr.freezer on April 09, 2014, 10:25:04 AM
can anybody write dimension of those o-rings on pushrod?? I have similar oil leak...
Title: Re: Oil leak at slave cylinder, suggestions?
Post by: koko64 on April 09, 2014, 12:25:51 PM
Sponsor CCW has them.
Title: Re: Oil leak at slave cylinder, suggestions?
Post by: skurvy on April 10, 2014, 06:07:15 PM
Had the same issue, I replaced all three o-rings and the leak stopped. Hopefully that's all it is.