Mavic Freehub Not Free any more?

cgfw201
cgfw201 Posts: 674
edited January 2016 in Workshop
Having had some issues with my front wheel this week, I (possibly through a new found paranoia) have been having a look at the rear one too.

I've noticed that the pedals keep turning with the wheel when there's no pressure on the pedals. I think this is a new thing, but I can't remember for sure if this happened before or not.

I've also noticed the wheel rotating backwards when I rotate the cranks backwards. Should the freehub not be stopping this from happening?

This is shown here: https://www.youtube.com/watch?v=a4rWvjPbl1E

I also took the freehub off yesterday, gave it a clean and reapplied some Baby Oil as lubricant.

When putting the freehub back on the spindle it has a very slight wobble as shown in this vid,

https://www.youtube.com/watch?v=xOFIoZqs72o

Is that normal? It feels like there's a washer missing or something to keep it in place more firmly, but I don't think I missed a washer when I took it apart.

Are these normal problems and to be ignored or am I missing something obvious/simple to remedy these things?

*(They are 2014 Ksyriums)

Comments

  • bbrap
    bbrap Posts: 610
    The freehub body has a nylon/plastic bush at the open end which wears thin and allows a bit of play. Looking at the 2nd vid of the side to side play it appears to be at the closed (bearing) end which implies that the bearing is shot. I think Mavic say the bearing is not replaceable and that you need a new body. I would remove the body again and carefully check the bearing and bushing for wear then replace as necessary. Obviously the easiest solution (and the most expensive) would be to replace the body, I (being an engineer) would knock out and replace the bearing, then source a new bushing (being me I'd probably turn a new one on the lathe) :D
    Rose Xeon CDX 3100, Ultegra Di2 disc (nice weather)
    Ribble Gran Fondo, Campagnolo Centaur (winter bike)
    Van Raam 'O' Pair
    Land Rover (really nasty weather :lol: )
  • cgfw201
    cgfw201 Posts: 674
    The freehub body has a nylon/plastic bush at the open end which wears thin and allows a bit of play. Looking at the 2nd vid of the side to side play it appears to be at the closed (bearing) end which implies that the bearing is shot. I think Mavic say the bearing is not replaceable and that you need a new body. I would remove the body again and carefully check the bearing and bushing for wear then replace as necessary. Obviously the easiest solution (and the most expensive) would be to replace the body, I (being an engineer) would knock out and replace the bearing, then source a new bushing (being me I'd probably turn a new one on the lathe) :D

    It all looked ok inside there. I'm going to give it another clean. I didn't lube up the white plastic bit so wondering if that could be it?

    If it is the bearing, would buying one of these be all that's needed?

    dfsadffdd.png
  • bbrap
    bbrap Posts: 610
    That should do it. Bit of light oil on re-assemby and jobs a good un.

    P.S. If your bearing appears to be OK check the axle is running true and not flopping about. The bearing in the freehub body runs on the outer end of the axle which could be loose if the main bearings (wheel) are knackered.

    PPS. Ignore the last bit, just looked again, the play is definitely in the freehub bearing as the axle remains solid.
    Rose Xeon CDX 3100, Ultegra Di2 disc (nice weather)
    Ribble Gran Fondo, Campagnolo Centaur (winter bike)
    Van Raam 'O' Pair
    Land Rover (really nasty weather :lol: )
  • cgfw201
    cgfw201 Posts: 674
    That should do it. Bit of light oil on re-assemby and jobs a good un.

    P.S. If your bearing appears to be OK check the axle is running true and not flopping about. The bearing in the freehub body runs on the outer end of the axle which could be loose if the main bearings (wheel) are knackered.

    PPS. Ignore the last bit, just looked again, the play is definitely in the freehub bearing as the axle remains solid.

    Ok hoping it's not that but at least I know it's easy enough to replace if so.


    Having read some other bits elsewhere I think I could have overtightened everything which could lead to the lack of play in the freewheel.
  • cgfw201
    cgfw201 Posts: 674
    Had another good fiddle and clean tonight and it's a lot happier.

    Not 100% sure what made the difference, I think doing things up less tight is a factor.

    Hopefully this will do the job for the foreseeable future as cant afford two new wheels in the space of a week!

    Here it is in improved form

    https://www.youtube.com/watch?v=LTf65H0Hu-0