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Hayes HFX-9 HD Help

Started by loomer · · Last activity · 9 posts · 476 views

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Mountain Bikes
Published
13 May 2004
Last activity
16 May 2004
Original author
loomer
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9
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  1. I bought them as a set (f/r). I had to remove the hose to get the rear to
    fit through the frame. I never undid the hose for the front. I set them up
    and bleed the rear. The brakes work fine I am just trying to get the same
    action on the levers between the front and rear.

    I can not get the rear brake lever to have the same action (point at which
    the lever makes the pads engage the rotor) as the front.

    I have bleed the rear brake many times and I am sure I am doing it right but
    it never feels the same as the front.

    Any Ideas?

  2. "loomer" <[email hidden]> wrote in message
    news:[email hidden]...

    Quoted message said:

    I bought them as a set (f/r). I had to remove the hose to get the rear to
    fit through the frame. I never undid the hose for the front. I set them


    up

    Quoted message said:

    and bleed the rear. The brakes work fine I am just trying to get the same
    action on the levers between the front and rear.

    I can not get the rear brake lever to have the same action (point at which
    the lever makes the pads engage the rotor) as the front.

    I have bleed the rear brake many times and I am sure I am doing it right


    but

    Quoted message said:

    it never feels the same as the front.

    Any Ideas?


    Loomer,
    Pull your brake lever in and secure it there with a zip-tie, rope, tape,
    etc. Tap on the caliper and lines with a piece of wood (or something that
    won't damage the hardware). Leave it this way overnight and bleed it again
    the next day. You have a nice solid feel to you brakes after this. What
    this does is forces the air bubbles out of the pistons and allows them to
    rise to the bleeder fitting.

    Dave Haley

  3. "Dave Haley" <[email hidden]>

    Quoted message said:

    What this does is forces the air bubbles out of the pistons and allows them


    to

    Quoted message said:

    rise to the bleeder fitting.
    Dave Haley

    Thanks for the tip but could you descibe this in a little more detail? I
    take the pads off when I bleed. Should I put something in the caliper to
    put pressure in there too?

  4. "loomer" <[email hidden]> wrote in message
    news:[email hidden]...

    Quoted message said:

    "Dave Haley" <[email hidden]>

    Quoted message said:

    What this does is forces the air bubbles out of the pistons and allows


    them

    Quoted message said:

    to

    Quoted message said:

    rise to the bleeder fitting.
    Dave Haley

    Thanks for the tip but could you descibe this in a little more detail? I
    take the pads off when I bleed. Should I put something in the caliper to
    put pressure in there too?


    Leave the pads in and the wheel installed while you have the lever clamped.
    Leave the bike with the lever clamped for a few hours. Remove the lever
    clamp and bleed the brakes following the Hayes procedure
    http://www.hayesdiscbrake.com/pdf/BleedKit-45-14576BEnglishWeb.pdf .
    Definitely remove the pads as bleeding Hayes brakes has a great potential to
    contaminate the pads if you have a leak while pushing fluid in the system.

    My current bike has Shimano XT hydraulic brakes which bleed like motorcycle
    or automotive brakes, Hayes is kind of a reverse process as you are pushing
    fluid from the caliper to the master cylinder.

    I hope this clears thing up a bit

    Dave Haley

  5. "Dave Haley" <[email hidden]

    Quoted message said:

    Pull your brake lever in and secure it there with a zip-tie, rope, tape,
    etc.

    Should I leave the lever zip tied and pulled in when I bleed the system?

  6. "Loomer" <[email hidden]> wrote in message
    news:[email hidden]...

    Quoted message said:

    "Dave Haley" <[email hidden]

    Quoted message said:

    Pull your brake lever in and secure it there with a zip-tie, rope, tape,
    etc.

    Should I leave the lever zip tied and pulled in when I bleed the system?


    No,
    Once the system has sat in this condition for a few hours release the lever
    and bleed as the Hayes instructions indicate. Please see my post at 3:29pm
    for details.

    Dave Haley

  7. "loomer" <[email hidden]> wrote in message news:<[email hidden]>...

    Quoted message said:

    I can not get the rear brake lever to have the same action (point at which
    the lever makes the pads engage the rotor) as the front.

    if brake feel and brake action are ok it's not that the system
    needs (re)bleeding, it'll be the throw screw in the lever
    that's - one will be wound out more than the other, giving different
    engagement points (this is a feature not a bug!)

    On mine the 'locking compound' on those grub screws ex-factory was
    next to useless, they'd actually unwind during a ride due to vibration
    - apply some decent thread locker (i.e. blue loctite) after you've got
    them set to where you feel happy.

  8. In news:[email hidden],
    Loomer <[email hidden]> typed:

    Quoted message said:

    "Dave Haley" <[email hidden]

    Quoted message said:

    Pull your brake lever in and secure it there with a zip-tie, rope,
    tape, etc.

    Should I leave the lever zip tied and pulled in when I bleed the
    system?

    NO! If the lever is pulled the hole in the master cylinder will be closed.
    While you are bleeding the brakes you may 'snap' the lever a couple of times
    to shock loose any bubbles in the system. The rear brake is never going to
    feel as good as the front due to the longer length of hose. I've heard
    Goodridge brake lines solve this problem but never tried them myself.

    Mike

  9. John Davis said:

    "loomer" <[email hidden]> wrote in message
    news:<[email hidden]>...

    Quoted message said:

    I can not get the rear brake lever to have the same action (point at
    which the lever makes the pads engage the rotor) as the front.

    if brake feel and brake action are ok it's not that the system
    needs (re)bleeding, it'll be the throw screw in the lever
    that's - one will be wound out more than the other, giving different
    engagement points (this is a feature not a bug!)

    On mine the 'locking compound' on those grub screws ex-factory was
    next to useless, they'd actually unwind during a ride due to vibration
    - apply some decent thread locker (i.e. blue loctite) after you've got
    them set to where you feel happy.

    Ditto with mine. A blob of loctite seems to have fixed the problem.
    I didn't even know the little buggers were there, tucked away almost out of
    sight, until it was pointed out to me.
    --
    Westie
    (Replace 'invalid' with 'yahoo' when replying.)

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