Internaly routed brake cable replacement

BoingBoing
BoingBoing Posts: 383
edited August 2013 in Workshop
Hi,

I have a Focus Cayo with internal routing for the rear brake cable.

Does anyone know how to feed the cable through the top tube successfully....I'm failing :(

Thanks

Comments

  • Monty Dog
    Monty Dog Posts: 20,614
    Is there a liner / guide through the frame? If not, you'll probably need to remove the seatpost, make some sort of guide tool using an old spoke - thread the cable through, tape it to the end of the spoke and pull it through.
    Make mine an Italian, with Campagnolo on the side..
  • Harry182
    Harry182 Posts: 1,170
    Do the inner cable first and bend/curve the leading end slightly.

    Thread enough length through the frame so that the cable end is about at the exit hole then kind of poke back and forth turning the cable slightly to adjust the angle/ position of the cable end.

    Should work fairly easily with only a little patience.
  • Nope there's no liner.....and silly me I didn't check before removing everything :oops:

    I've tried poking about with a length of inner for as long as I could remain patient and no sign of the bloody thing at the other end :(

    Also since the frame is carbon fibre you can't get at it via the seat tube, and the entrance/exit holes appear to protrude into the frame to some degree making it bloody difficult to poke and hope
  • Tom Butcher
    Tom Butcher Posts: 3,830
    If you shine a torch in can you see the inner passing the exit hole ?

    If so I think you are just going to have to spend more time trying to hook it with a bit of bent wire until you manage it.

    it's a hard life if you don't weaken.
  • Burton
    Burton Posts: 172
    Not tried this myself but heard it works....

    Poke some cotton into one end of the frame cable opening and the stick your vacuum on the other, this should suck the cotton through.
    I guess next you should try and pull an INNER cable through with the cotton, then push the outer over the inner.

    Be interested to know if it works...

    JB

    (For reference, a Felt B2 TT bike has liners in the frame, thank gawd!)
  • magnet to pull the inner cable to the exit hole?
  • careful
    careful Posts: 720
    On some frames the cable stop/guide at the exit and entry holes can be popped out giving a bit more room to work - obviously to go carefully though in case yours arent meant to!
  • The cable guides drop out easily enough, but it doesn't help.

    If I shine a torch in the exit hole I can still see eff all :(

    I've managed to suck some cotton in through the entry hole using the vacuum method, however it doesn't come out through the exit hole :?:

    Am stuck, and have no bike for my planned ride on my day off tomorrow :(:(
  • PIY
    PIY Posts: 3
    What worked for me with mine was to feed through a cable outer from the hole at the back of the frame. I managed to encourage it to come out the front and then I fed the inner through this before removing the outter
  • Vacuum trick with cotton worked great for me, measure cotton to length and tie a knot in it, feed from the rear with vacuum at the front hole use the knot to gauge how far cotton has gone and move cotton back and forward until vac pulls it through. Tie cotton to cable and wrap with insulation tape, don't forget the front ferrule before you attach cotton. Many thanks to the genius who came up with this!
  • rafregt1
    rafregt1 Posts: 52
    Whilst on the topic of internal brake cabling, I too have a Focus but mine is the Izalco model.
    Took mine to my LBS as the rear dura ace calliper was sticking and my brake lever felt spongy and didnt have that "dura ace feel"
    To mine and the mechanics amazement upon him removing the rear brake cable from its internal housing it had completely rusted away?
    Not to be expected on this years model with not "that many" miles on the clock and only used in dry weather (and I've had it from new, so know its history)

    Just goes to show......??
  • triban
    triban Posts: 149
    Not Helpful now, but for next time:

    leave the cables in place in the frame, pull out the old inner cable and insert the new inner cable to the old outer.

    then slide out the old outer, leaving the new inner in the frame. then slide the new outer over the new inner - you should end up with the new cable fitted without to many issues!

    hope that helps in the future. :D