clutch slave

[swooshdave]

If the seal was causing a problem typically they leak when they get old. I guess I should reread all 70 pages as to why you think it's the seal.

 

 

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[Scud]

You need a second V11. Do we need to find one for you?

 

I know where there are some viable options... a green one and a champagne one... both just need a little more love. 

 

Hey - I'm also wondering about the focus on the clutch slave's seal. Of course, I haven't felt what you are describing, but I have had a leaky slave cylinder on a dirt bike - you lose pressure and fluid. In the case of the dirt bike, the fluid "disappeared" into the engine oil. But with the V11, it would dribble out the opening in the rear case of the transmission.

 

You have previously reported a very noisy clutch. Perhaps you are trying to avoid pulling the engine or transmission, but it seems that's going to need some attention soon. Has there been so much wear in the flywheel that the plates are getting bound up and not allowing the clutch to re-engage? That could also explain what you are feeling - and seems more likely to me than a sticky piston.

[Chuck]

One of the answers from WG..

I know it's not oem but Kaman, Motion Ind. or any good bearing house or Hydraulic shop should have that nowadays. If all else fails I know they make O-ring kits to build your own.   Plan B... I have a spare used complete slave Lemme know 

    Paul B 

 

 

[Chuck]

Docc, here's the thread on WG. That way you can listen to the ventriloquist instead of the dummy..

http://wildguzzi.com/forum/index.php?topic=91144.0

[swooshdave]

Is the slave NLA or just not currently available?

 

 

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[Chuck]

Earlier in the thread he said NLA.

[docc]

 

You have previously reported a very noisy clutch. Perhaps you are trying to avoid pulling the engine or transmission, but it seems that's going to need some attention soon. Has there been so much wear in the flywheel that the plates are getting bound up and not allowing the clutch to re-engage? That could also explain what you are feeling - and seems more likely to me than a sticky piston.

 

The flywheel wear is a definite concern. I *thought* I was going with the simple solution first.   Another high(er) mileage V11 we know of just needed a clutch slave replacement. The failure doesn't *feel* mechanical like the clutch discs popping back out of the flywheel grooves. (But, yeah, I am totally putting off the big teardown. "Some people" seem to take these things apart like Legos )

 

So, right, the Grimeca made V11 clutch "command" cylinder is No Longer Available.

[docc]

 

I'm struggling with the startling statistic that this single solitary seal has stranded my Sport . . .

 

Definitely. Is there a part number on the slave?

 

 

No part number on the Grimeca slave cylinder.

If the seal was causing a problem typically they leak when they get old. I guess I should reread all 70 pages as to why you think it's the seal.

 

 

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There is an outer round section O-ring that is likely the "seal". I'm trying to rule out the inner "flat" O-ring. Again, my failure could be (or could be exacerbated by) the worn flywheel [or input shaft as Chuck noted earlier], but I'm (obviously) hoping for a simple O-ring solution.

[LowRyter]

https://www.mcmaster.com/#o-rings/=18febsl

 

_{Square-Profile High-Temperature Silicone O-Rings}

[docc]

Looks like Silicone O-rings are compatible with brake fluid, but have "low tear resistance and high coefficient of friction." Also, I only see fractional measures (no metric) silicone O-rings at McMaster-Carr (?)

 

"Silicone compounds are very clean and are used in many food and medical applications because they do not impart odor or taste. Silicone compounds are not recommended for dynamic O-ring sealing applications due to relatively low tear strength and high coefficient of friction. Silicone is resistant to hot air, ozone, UV radiation, engine and transmission oils, animal and vegetable fats and oils, and brake fluids." (https://o-ring.info/en/materials/silicone--vmq/?gclid=CjwKEAjwqIfLBRCk6vH_rJq7yD0SJACG18frNSY_FySPui6fJXq9hwsnFG4bfiZXzNSbtHtuH8V2ORoCptvw_wcB)

 

Will we be correct in declaring that the correct compound for this application is EPDM?

[swooshdave]

http://www.harpermoto.com/clutch-command-cylinder-05086330.html

[docc]

 

One of the answers from WG..

I know it's not oem but Kaman, Motion Ind. or any good bearing house or Hydraulic shop should have that nowadays. If all else fails I know they make O-ring kits to build your own.   Plan B... I have a spare used complete slave Lemme know 

 

    Paul B 

 

 

 

Everything at Motion Ind. looks to be inch measure, and no square section.

[docc]

http://www.harpermoto.com/clutch-command-cylinder-05086330.html

Yeah, I called Harper's two days ago: NLA, not in stock.

 

Moto International also lists the part online, but emailed me shortly after my order to advise the same.

[czakky]

Try calling some seal specialists. Even a custom job cost could be divided by the v11 community.

 

https://www.aceseal.com/ethylene-propylene-o-rings-gaskets-seals

 

http://www.allsealsinc.com/oilseals.html

 

Worth a shot at this point...

[docc]

Try calling some seal specialists. Even a custom job cost could be divided by the v11 community.

 

https://www.aceseal.com/ethylene-propylene-o-rings-gaskets-seals

 

http://www.allsealsinc.com/oilseals.html

 

Worth a shot at this point...

I'll go back to my local supplier later this week. They spec'd the build (in Nitrile) for about $13US each/ minimum of ten, but I'll have to see if they can have them built in EPDM.

 

In the meantime, I've contacted an EPDM supplier online as well as Ariete in Italy.

 

It just seems like the kind of thing that ought to already be in a bin somewhere, waiting to get bagged and shipped  . . .

 

Thanks, everyone for the community effort! We'll get this figured out! It'll be one for The En-psycho-pedia of Compatible Parts.