Revelation 426 question/problem

1mancity2
1mancity2 Posts: 2,355
edited November 2010 in MTB workshop & tech
Hi Guys,

Got a pair of 2006 Revs 426 bought second hand, discharged all air from positive and negative, when I released the air from + the fork sank into its travel by 100mm I know this is not correct but before I set out stripping them anyone any ideas as to what is wrong? I've had to put 300psi in the + to get the travel back if that helps.

Thanks in advance

Ali
Finished, Check out my custom Giant Reign 2010
Dirt Jumper Dmr Sidekick2

Comments

  • nicklouse
    nicklouse Posts: 50,673
    which did you discharge first?

    or have you made sure they are both totally empty?
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • 1mancity2
    1mancity2 Posts: 2,355
    Discharged - first, and yes they were both empty, filled - upto 130psi then + which took 300psi to get full travel again
    Finished, Check out my custom Giant Reign 2010
    Dirt Jumper Dmr Sidekick2
  • nicklouse
    nicklouse Posts: 50,673
    empty all again and start with the positive and see what you need to get 25% sag.

    then add negative to suit.

    positive should always be done first.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • 1mancity2
    1mancity2 Posts: 2,355
    ok buddie I will do that and let you know
    Finished, Check out my custom Giant Reign 2010
    Dirt Jumper Dmr Sidekick2
  • 1mancity2
    1mancity2 Posts: 2,355
    ok done that, forks gained travel alot faster and only put 140psi in + and 130 in -, what I did notice is when I discharged air from the - a creamy oily liquid discharge as well, like from a old compressor, is this normal?
    Finished, Check out my custom Giant Reign 2010
    Dirt Jumper Dmr Sidekick2
  • nicklouse
    nicklouse Posts: 50,673
    it is if you have the forks vertical as the oil sits at the bottom of the fork leg and the air blows it out.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • 1mancity2
    1mancity2 Posts: 2,355
    So normal and nothing to worry about then?
    Finished, Check out my custom Giant Reign 2010
    Dirt Jumper Dmr Sidekick2
  • nicklouse
    nicklouse Posts: 50,673
    well you should have the forks on their side to lessen oil loss.

    it is for lube.

    any idea as to when the last service was?
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • 1mancity2
    1mancity2 Posts: 2,355
    No idea, but I think I will get them booked in for one.

    Once again thanks for the advice.
    Finished, Check out my custom Giant Reign 2010
    Dirt Jumper Dmr Sidekick2
  • uk_mr_brownstone
    uk_mr_brownstone Posts: 343
    I have a related question about 2010 Air rev Race's. Any reason why running them intentionally with about 20-30% more negative air than positive air pressure would cause a problem? The reason is to purposely reduce the travel temporarily so they fit on another frame I have that is more suited to 110/120mm forks. By doing the above the axle-to-crown measurement and available travel becomes roughly the same as my coils 426's set at 110mm. They feel fine when set as described above but thought I'd ask the guys here that know a lot more than me!

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