Section : Gearbox

Where does this bit go?

Posted By : Ian Knott, 02-Sep-2003, 10:05am

I am trying to fix a leak in the clutch slave cylinder in my Mk iv and have bought what appears to be the standard repair kit - you can see the kit in this link to Rimmers:



Image Courtesy of and Copyright Rimmer Bros Ltd

I may be being stupid but I cant figure out where the flat rubber disk (shown as the bottom of the 4 bits in the picture) goes - there wasnt one when I took the cylinder apart! What I have got instead is a rubber "cup" that fits over the end of the cylinder which needs to replacing - but I havent seen any mention anywhere of this bit as a part in its own right.

Any help very much appreciated

Ian

• Where does this bit go?

  Posted By : Roger Smith, 02-Sep-2003, 12:16pm

  I hope this helps. (If pic. does not get to you e-mail me on smith@smith-family.freeserve.co.uk)
  
  Taken from workshop manual

  
  
  Where does this bit go?

  • Where does this bit go?

    Posted By : Ian Knott, 02-Sep-2003, 01:24pm

    Thanks Roger, that does help.
    
    From what I can tell the parts marked on your diagram as 2B and 3B (the dust cover retainer and the dust cover) appear to be combined in one rubber piece in the parts I have taken off my car.
    
    Looks like I will have to try an get hold of a dust cover retainer - at least I know what it's called now!

• Where does this bit go?

  Posted By : William Davies, 02-Sep-2003, 03:29pm

  Hi Ian,
  Is there a slot cut in the side of your cylinder for the pinchbolt to pass through, or is there a groove cut around the entire circumference for the same purpose? The correct slave cylinder for your car has a 7/8" bore and a metal cap with rubber disc for keeping the muck out at the end - this is the type with the notch down one side. Earlier Spitfires and Heralds with the coil spring clutch have a 3/4" bore cylinder with a rubber cap on the end - this type has the groove around it's entire circumference.
  It's possible you have the wrong cylinder fitted by a DPO, or someone has improvised after destroying the metal cap when removing it for rebuilding. The wrong cylinder will give a short clutch throw which may make disengagement marginal.
  Cheers,
  Bill.
  

  • Where does this bit go?

    Posted By : Ian Knott, 02-Sep-2003, 04:12pm

    Hi Bill
    The cylinder has a groove cut on just one side to let the pinchbolt pass and I have never noticed any problems with the clutch disengaging. Would the rubber cap fit on the later cylinder? (there is a lip on the rubber cap that appears to fit into a groove cut just in from the end of the cylinder so it looks as though they should go together).
    
    Regards
    
    Ian

    • Where does this bit go?

      Posted By : William Davies, 02-Sep-2003, 04:58pm

      Hi Ian,
      It sounds like you've got the correct cylinder. It'a actually very difficult to remove the metal cover without destroying it, so more than likely a previous owner has fitted the rubber cap from another cylinder. It's a good fix and I would re-use the cap you have if it's serviceable, otherwise buy a kit for another similar cylinder and rob it for the end cover. I think the cover from the SP2001 kit for the 3/4" slave will fit, worth it for a couple of quid.
      Cheers,
      Bill.
      
      

• Where does this bit go?

  Posted By : Roger Smith, 03-Sep-2003, 11:05am

  Hi Simon,
  
  Try this site. It seems to explains why you have a rubber, and not metal dust seal on your unit - 6 cyliner cars are fitted with them.
  
  http://www.canleyclassics.com/infodatabase.asp?top...
  
  Roger

  • Where does this bit go?

    Posted By : Ian Knott, 03-Sep-2003, 12:54pm

    Roger
    Thanks for that - I have already ordered a repair kit for the cylinder for the early spitfires/heralds so hopfully these seals will fit. If not this gives me something else to try!
    Regards
    Ian