Hope M4 Problems

mb-rider1991
mb-rider1991 Posts: 89
edited October 2007 in MTB workshop & tech
hiya there i have had a hope m4 for a couple of months and the last few weeks it has faded on me the leaver is all the way out and its still spongy.
what can i do to make it solid ??

Comments

  • nicklouse
    nicklouse Posts: 50,673
    if the caliper is aligned correctly and the disc is not moving then a bleed could help. But check the caliper alignment first and the lever reach screw.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • mb-rider1991
    mb-rider1991 Posts: 89
    when bleeding is it better 2 have the lever reach screw fully in or out 2 make it so it has harly any move ment ??
  • nicklouse
    nicklouse Posts: 50,673
    does not really matter. as it is just a lever adjust. it should not move the internals.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • mb-rider1991
    mb-rider1991 Posts: 89
    it dose the futher out the more powerful it becomes
  • nicklouse
    nicklouse Posts: 50,673
    nope has nothing to do with power. just how big your hands are.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • skyliner
    skyliner Posts: 613
    I've found it does make a difference to the bleed if you open the reservoir and use the lever to push fluid through from the top.
    If the span adjuster is wound fully out, when you pull the lever back to the bar, the fluid goes through fine. But something blocks the hole from the reservoir through to the MC bore, and stops fluid going down from the reservoir into the system when you release the lever. Don't ask me why, or how this occurs, but the only cure i've found for it, is to adjust the lever closer to the bar, then resume the bleed.
    Not a problem if you use the Hope pressure bleed kit though.
    It's nice to be important, but it's more important to be nice.
  • nicklouse
    nicklouse Posts: 50,673
    interesting. is this with the more recent (not that i belive they have changed anything) brake set ups? as my usage is all Pre mono with the mini lever.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • skyliner
    skyliner Posts: 613
    I've only seen it on pre 07 Mono brakes with the sport/mini lever. But on several occasions.
    I only found that adjusting the span worked after trying everything else and getting frustrated enough to try it on the first occasion.
    Since then, I've done it as a first course of action when it occurs, and it's never failed so far. "Go figure?"

    I know in theory, it should make no difference at all !
    I'm currently dissecting an old damaged lever body to try to get to the bottom of it.
    It's nice to be important, but it's more important to be nice.

Categories