air still present hydraulics - help

Graeme_aberdeen
Graeme_aberdeen Posts: 156
edited May 2011 in MTB workshop & tech
Hi All

1) Pre condition - front brake (formula b4) very spongy almost no braking power.
2) Performed 2 bleeds (I wasn't sure if the 1st one had worked)
3) On 2nd bleed, air was constantly flowing into (small bubles) the caliper bleed syringe, got as much out as possible (stopped after approx 5 mins of doing procudure)
4) Whilst bleeding lever it also was constantly giving air into syringe.
5) Whilst depressing the lever syringe to create a vacuum the lever was very spongy indeed. (is did attempt to remove as much air by pumping the lever a few times, not too many).
6) closed off and replaced bleed screw

Front brake still same, does not want to work?

Any ideas at all? and how I can service this myself?

thanks all

Graeme
I like bike, bike is bike.

Comments

  • nicklouse
    nicklouse Posts: 50,675
    sounds like seals have gone.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • Graeme_aberdeen
    Graeme_aberdeen Posts: 156
    nicklouse wrote:
    sounds like seals have gone.

    it's a 2004 bike - so I guess this is an issue of age.

    Can seals be replaced? or am I looking at just biting the bullet and sourcing a new front brake?

    thanks for the reply by the way, appreciate it.

    G
    I like bike, bike is bike.

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