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  1. #1
    qui
    qui is offline
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    E150 harsh? bottom out, and squeak on max low speed compression

    Hi,

    I recently done a service on my fork, and one of the lower leg rubber grommets/ bumpers fell out, I replace it back into the lower leg, however ever since I think I have been noticing a harsher bottom out especially when in Climb mode and compressing the fork. Is there an orientation to the bumpers, as I replaced it as best as I could tell the same as the other side i.e. both visually looking into the lowers with a flashlight appeared to have the same pattern showing. Should it be very easy to bottom the fork in climb mode, in full extension mode I have around 10-20mm left before bottoming if I bounce on the fork (try to compress it using my body weight while stationary)

    The other issue I have noticed is that when I put on full low speed compression I notice an odd squeaking noise, but if I back off 1-2 click the noise goes away, is this an issue.

    Any helps much appreciated, bikes done approx 10-15hrs, and I am using Silkolene Pro RG2 as the grease. Incedentally my fork came to me dry with just grease but no fork oil.

  2. #2
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    Quote Originally Posted by qui
    Hi,

    The other issue I have noticed is that when I put on full low speed compression I notice an odd squeaking noise, but if I back off 1-2 click the noise goes away, is this an issue.
    This is not a problem, the oil is being forced past some metal shims at high speed and they are vibrating.

    The bumpers do have an up and a down side. The smaller side of the bumber goes down.

    See below for greasing the o-ring in the air cartridge. If the fork was dry, maybe that o-ring is too. Your SlickOleum grease will be OK there as well.

  3. #3
    qui
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    Thanks for the reply. After dropping the lowers again about 2 hrs ago I noted that both rubber rings where in identical orientation, so I assume they are correct, I reapplied some grease to the seals and some grease the the bushings which were "dry". I can only assume that the bottoming which seemed hard is natural.

  4. #4
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    Those rubber bumpers are a loose fit and flip upside quite easily, so they both may be incorrect. Also, I would add 5 psi to the fork to see if you still get full compression of the fork with a bit less harshness at the bottom of the stroke. Just a note; greaseing the bushings will not do anything as the fork oil in the lowers will wash it away in a few hours of riding.

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