Clutch shaft oil seal

Discussion in 'Tech help for Blackbirds' started by sr71caspar, Nov 4, 2018.

  1. sr71caspar

    sr71caspar B̶a̶n̶n̶e̶d̶ Club Sponsor

    Is this known for leaking?

    I have oil dribbling from the front sprocket cover area. I've taken the sprocket cover/clutch slave cylinder off to look for the leak and it seems to be coming from clutch cross shaft seal. The seal does not grip the shaft, i.e. there is a gap around the shaft.

    Just wondering if anyone has come across this before?
     
  2. andyBeaker

    andyBeaker Moderator Staff Member Moderator Club Sponsor

    There has been a smattering of similar posts over the years on here - not being funny, but maybe a 'dumb' question :flipa:, are you 100% sure it is not oil being thrown off the chain, especially if you have a Scotoiler or similar.
     
  3. sr71caspar

    sr71caspar B̶a̶n̶n̶e̶d̶ Club Sponsor

    I've done a search, but found nothing similar.
    100% certain it's not chain fling. 20181104_133221.jpg

    I've only cleaned the clutch rod seal in that piccie- so I'm not being dumb:ciappa:

    It only really started dripping oil when I foolishly cleaned out all the crud from in there, when I changed C&S.
     
    • Optimistic Optimistic x 1
  4. Me!

    Me! Utterly retired Club Sponsor

    By chance did you grease the rod when it went in... could it be excess grease melted off, well, that’s what mine turned out to be .....
     
  5. sr71caspar

    sr71caspar B̶a̶n̶n̶e̶d̶ Club Sponsor

    Yes and no.
    The small amount of grease used would only be a fraction of the puddle volume left.
     
  6. andyBeaker

    andyBeaker Moderator Staff Member Moderator Club Sponsor

    What I was getting at is that there have been some posts over the years where the posters have suspected an oil leak in that area but it turned out to be excess chain lube.
     
  7. sr71caspar

    sr71caspar B̶a̶n̶n̶e̶d̶ Club Sponsor

    Yes. Thank you.

    The dripping oil is too thin for chain lube.
     
    • Informative Informative x 1
  8. Jaws

    Jaws Corporal CockUp Staff Member

    Never known a pushrod seal to go, but have known a few output shaft seals to.
    Looking at it, you can use a seal pick to get it out and a replacement is about £6..
     
    • Like Like x 1
  9. sr71caspar

    sr71caspar B̶a̶n̶n̶e̶d̶ Club Sponsor

    I did think the output shaft seal at first, but around the push rod seal was where the oil was and the seal is a clearance fit on the shaft.

    You should be able to see a slight gap at the top of the push rod.
    20181105_155504.jpg

    I will take the front sprocket off and check- may as well replace that seal as well while I'm doing the rod seal.
     
    • Like Like x 1
  10. andyBeaker

    andyBeaker Moderator Staff Member Moderator Club Sponsor

    I have absolutely zero idea if there is or how much pressure there is behind that seal. Is it worth packing it with grease as best as you can to see if that sorts it? Seem to remember you saying there was no sign of a leak until you removed the normal crud that had built up under the sprocket cover??
     
  11. sr71caspar

    sr71caspar B̶a̶n̶n̶e̶d̶ Club Sponsor

    For a couple of quid and a bit of time tinkering in the garage, I'd rather do it right.:thumbsup:

    I thought you disliked diy bodges? :stick::nono::D
     
  12. andyBeaker

    andyBeaker Moderator Staff Member Moderator Club Sponsor

    I do...unless they work!!

    But I,do,agree, if it is easily replaced then that's what I would do.

    That's put you in a quandary, hasn't it.....
     
    • Like Like x 1
  13. sr71caspar

    sr71caspar B̶a̶n̶n̶e̶d̶ Club Sponsor

    Quick update- it's not the output seal...

    20181107_150849.jpg

    I've replaced it anyway.
     
  14. andyBeaker

    andyBeaker Moderator Staff Member Moderator Club Sponsor

    What was it then?

    Excess chain oil by any chance?

    :couch:
     
  15. sr71caspar

    sr71caspar B̶a̶n̶n̶e̶d̶ Club Sponsor


    Not got the clutch rod seal yet. 100% certain it is that.

    No.:flipa:
     
    • Optimistic Optimistic x 1
  16. Jaws

    Jaws Corporal CockUp Staff Member

    I have been reminded that about 14 years ago I did have to deal with a leaky push rod seal
    It was on a german guys bike who was touring here and he called in the a service..

    Put the bike on the ramp and soon got a few drips out of the sprocket cover
    I put two layers of heat shrink tubing on it..
    After a test ride it cured the problem but it was a temporary fix and no idea how long in lasted
     
  17. sr71caspar

    sr71caspar B̶a̶n̶n̶e̶d̶ Club Sponsor

    Clutch rod seal now fitted.

    20181108_161356.jpg


    I'll update after a few rides as to whether it's fixed.


    .......if I remember and if I can be bothered.
     
    • Thanks Thanks x 1
    • Optimistic Optimistic x 1
  18. Grey Wolf

    Grey Wolf Been there, and had one Club Sponsor

    oh the suspense, is killing me :squezer:
     
  19. andyBeaker

    andyBeaker Moderator Staff Member Moderator Club Sponsor

    I am more concerned about the two yoghurts I have in the fridge that are just about to go out of date....
     
  20. sr71caspar

    sr71caspar B̶a̶n̶n̶e̶d̶ Club Sponsor

    I was attending Rememberance Day parade on Sunday so not had a chance to go for a ride yet.
     

Share This Page