137249 viton clutch 348 tb

Hello,
I've already removed the three Viton seals; I ordered and received them. I tried to install them with special grease and a bottle cap, but it's impossible. How did you do it? I saw on this forum that they remove the drivers and that there's a special tool for it.
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remove circlip. put the plastic rings in water at the temp of hot tea for 2 mins. That softens the plastic. you can work each ring over the shaft. place tings into the shaft land and let hang. they will be stretched out. Leave them alone for a while like an hour and they will slowly shrink down to almost the right size. They will still be too big but you can push input shaft toward clutch shaft. once 1st ring meets clutch shaft use pressure and tool to push and shrink the ring into the clutch shaft while still in the land of the input shaft. grease on the lip of clutch shaft helps. Rinse and repeat. These are crap seals and don't really seal but resist splash and sort of seal. That's why there are 3 of them.

Some people have used a soda bottle cut and wrap the shaft and seals using hose clamp to squeeze back seals to right size then use rubber mallet to tap input shaft back in while the seals slide into the clutch shaft. many ways to skin a cat....good luck

 

Thank you very much for your help, but which tool are you referring to?

 

Ferrari did make special tools but I never used them. They didn't work well. I installed them very much like FBB describes but did not heat them up. Nothing wrong with heating as described but when doing it against the clock I am not motivated to wait for them to shrink back to size. Using fingers to crush back into the groove then with slight pressure with one hand on shaft and one hand very carefully using small tool to push in place it goes together quickly. Once in place pull shaft out to inspect seals. They will just slide back in. Terrible seal design. The idiot who designed them is better suited to being a toll booth attendant.

 

They do make two types of "sealing rings" When I replaced my seals the original ones were a hard white nylon while the replacement Viton seals were a softer tan coloured material. These are flexible and easily installed with a bit of oil. JGW

 

No one made a video about it?

 

This is how I did the triple seals: Triple Seals and Pumpkin Installation - Another Way | FerrariChat

 

I really struggled the first time I did this job, and I too found that the hot water trick made no difference, and they ended up misshapen.

The 2nd time I did it was a lot easier - I just used the plastic bag the seals came in (the sort of heavier plastic, the like of which they sell nails and screws in). I just trimmed one corner off to make a sort of hat for the shaft, then slipped the seals on and when they were in the right place just pulled the bag away whilst holding the seal in place. No hot water required, no misshapen seals - very quick and easy to do

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Thank you very much, I succeeded with the boiling water technique, except that my joints are much too big. Now I bought heat-shrinkable sheaths, we'll see.

 

What Jeff is showing on the pictures above appear to be aftermarket rather soft Viton seals which are fairly easily stretched (like rubber bands) and should not need boiling in water. The original seals were made of rather hard (tough) material, dark grey colour (if I remember well), which appears to be some kind of Teflon, and these need to be heated up so that they can be stretched. And even then quite a bit of force is needed to stretch them. This was the type I bought from Eurospares and installed using a method as described in the link I provided here in post #7.