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Trek Fuel 80 rocker re-assembly

DTM12DTM12 Posts: 163
edited November 2007 in MTB workshop & tech
Does anyone know how tight to do up the rocker pivotts on a trek fuel 80. It has nylon / plastic bushings and a simple thru axle and bolt setup. The manual says between 11-13 nm so I tried 12nm when re-assembling and this is very tight and it does make the main rocker bind up and not move 100% freely. Loosening them off frees the suspension but I reckon they would inevitably come loose. I will use blue loctite, but I noticed that the bolts had come loose and they seemed to have the red stuff on them from the factory ??

I guess the nylon bush outside flanges just take the lateral play out of the rear swingarm ? and that you can only compress them so much But I suppose if you compress them too much then it will create a lot of tightness ? Just wondering how it works, is it like preloading a bearing ? i.e just enough until you feel turning resistance through the bearing ? Or do the bushings work in a different way ? And you can tighten them up quite tight and just allow them to compress and take the play up ?

I know I should follw the manual to the word, but I have read back on some forums to discover other people questioning the same thing ?

Is this rocker tightness just a downside to a cheaper bike having nylon bushes over bearings


  • Sir HCSir HC Posts: 20,148
    Suspension systems will have stiction in them, more so if there are nylon bushings.

    Are the bushings new ?
    Intense Socom
  • DTM12DTM12 Posts: 163
    Not very new, I guess about 10-15 longish rides.
  • Sir HCSir HC Posts: 20,148
    Is the stiction only noticable with the shock and rear wheel removed ?
    Intense Socom
  • DTM12DTM12 Posts: 163
    Pretty much, its very slightly noticable when the bike is built up fully and you push down on the saddle, (its a tiny bit more sluggish in its movement when the bolts are fully torqued as opposed to left loose) but its marginal to be honest. But yes when the bike is stripped down and its only the rocker on the frame that you have to move then it is noticalbly tighter then
  • nicklousenicklouse Posts: 50,675 Lives Here
    Not having dismanteled a rocker of a fuel (yet) i have not thrown my 2p in but i will now.

    It does sound like something is missing. the Bolts should not create friction when tightened they should just hold everything together.

    Might have to dismantle that frame in the shop tonight.

    get pics of your parts dissasembled, one side will do. and i will see what i can find out.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • DTM12DTM12 Posts: 163
    I got the exploded tech drawing from Trek yesterday, its such a simple system, and everything is definately intact and inplace, I guess its just the system that isnt that great
  • Hi DTM12.

    Sorry I can't help with your query but can i be cheeky and ask if would forward the tech info you have received from Trek to me. My email address is richardolley at googlemail dot com.

    I also have a Trek Fuel 80 and had one of the rocker arm bolts come loose. I re-tightened it using some blue loctite and it's been fine since but the tech info would be useful for reference.

    Apart from this issue, how have you found the bike? Did you get it from Pauls by the way?

    Many thanks,

  • DTM12DTM12 Posts: 163
    On its way :)
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