ChrisC Posted December 3, 2017 Share Posted December 3, 2017 While my gearbox is out I noticed the oil seal on the back of the CRB has lost its spring round the circumference. Its the hydraulic concentric bearing (from a Mondeo V6). I had no clutch problems, or CRB problems in uses, and the car has only covered 1500 miles since new. I am not sure why the seal is even there, it’s not like there is any oils from either the gearbox or engine there, I assume the seal has a function in a mondeo, but not a Caterham. Is this seal needed in a Caterham? Can I ignore it and reuse the CRB. Link to comment Share on other sites More sharing options...
John Vine Posted December 3, 2017 Share Posted December 3, 2017 I've just unearthed an old slave cylinder from my R400D. I can't see anything that looks like an oil seal. Is yours fitted to the flange at the back of the mounting plate?JV Link to comment Share on other sites More sharing options...
John Vine Posted December 3, 2017 Share Posted December 3, 2017 Thinking a bit more about this, it could be that the oil seal is there to seal the gearbox input shaft (on a Mondeo, that is). I can't see that it's needed at all on a Caterham, given that the input shaft will already be sealed.Perhaps a call to CC would help?JV Link to comment Share on other sites More sharing options...
ChrisC Posted December 4, 2017 Author Share Posted December 4, 2017 The seal is on the CRB slave cylinder, on the back (if you like) of this https://caterhamparts.co.uk/clutch-parts/2221-clutch-bearing-assembly-ford-r400.html. its not on the spacer. I have this spacer https://caterhamparts.co.uk/clutch-parts/4615-spacer-clutch-slave-cylinder-duratec-08-2010.htmlThe seal must be redundant on the Caterham, the Type 9 gearbox just doesn't have a machined surface on the input shaft for the seal to run on, and holds its own oil. But as a precaution I have come up with a cunning plan, I have purchased an oil seal of the same size 26mm internal 42mm external, when it arrives I am going to take the garter spring from my £2 purchase and put it on my CRB's oil seal. Link to comment Share on other sites More sharing options...
John Vine Posted December 4, 2017 Share Posted December 4, 2017 Sounds like a plan! But it's probably worth a call to Tony in Parts just to establish whether the seal is needed at all.This is what my old slave cylinder (sans seal) looks like:I take it the red arrow indicates where your seal sits?Unfortunately, I wasn't present when mine was replaced, so can't vouch for the state of either the original (in 2008 kit) or the replacement. I have the 6-speed, although I imagine that makes no difference?ETA: I've just found this pic (Mondeo 2.5 V6 FINIS 1504696):JV Link to comment Share on other sites More sharing options...
ChrisC Posted December 4, 2017 Author Share Posted December 4, 2017 Yep that's it - I am 100% sure its not needed because there is no oil to seal in that area bell hosing. Its just part of the original parts design, and not needed on a Caterham. I must have caught it when I fitted the gearbox initially. Must be more careful next time.Many thanks guysChris. Link to comment Share on other sites More sharing options...
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