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  1. #1
    mtbr member
    Join Date
    Jan 2011

    UPDate : Suntour XCM stuck preload knob - partially unstuck

    I have a Suntour XCM V3 HLO 100mm travel fork on my 2011 trek 4500.

    The preload knob was stuck and when I tried loosening it with pliers, it got slightly warped. Fortunately, it was cosmetic. It moved only 2-3 mm.

    I tried again with an adjustable wrench and now, its moving more freely.
    It also looks like it's working (as I need to press harder on fork to make it move with extra preload. I have not tried sitting on bike).

    1)My doubt now is how many turns can I twist it either way ( - or + ).

    2) I have Finish line wet lube and also finishline stanchion lube.

    Should I put either of the above lubes around the preload adjuster to loosen it further?

    3) Do I need to do any maintenance for preload system ?

    My lockout knob is ok ( Possibly because I use it often).

    Thanks in advance and thanks to all who responded to my previous queries.

    Have a nice one.

  2. #2
    Class Clown
    Reputation: dundundata's Avatar
    Join Date
    May 2009
    I would advise removing the topcap and getting inside the fork rather than try and force things. You need a special tool though I think although could be a work around. In anycase I'm interested since I have a new XCT. Haven't even messed with preload now.

  3. #3
    mtbr member
    Reputation: hankscorpio's Avatar
    Join Date
    Jun 2012
    Mine did the same thing. My new Manitou Tower should be here this week at which point I plan on going "office space" on my suntour

  4. #4
    mtbr member
    Join Date
    Jan 2011
    Hi, I turned it towards less preload. I may have moved it towards minimum setting. It seems to be stuck again. The travel is 100mm. I tied a ziptie and when I sat on cycle and pressed brake too, displacement (sag) is approximately 32mm. Looks like this setting is ok. I weigh approx 215 pounds.

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