lower race siezed in S-8 headset - help please!

shefbiker
shefbiker Posts: 255
edited March 2011 in MTB workshop & tech
Hi
I've not ridden my mountain bike since commuting on it in the snow earlier in the year. I've come to it, and the headset was stiff, so i decided to dissemble it. I had to use a mallet to get the forks out, and it turns out that the bottom race was siezed and disintegrated.
The inner section of the bottom race was stuck on the fork/crown race, and was a pig to get off.
My big problem is the outer section of the lower race is stuck fast in the bottom headset cup, and i can't get any purchase on it with a screwdriver to prize it out. I've soaked it with GT85 for now, but need to get it out tomorrow.
The headset is a Cane Creek S-8 with 'sealed' bearing races, rather than traditional loose balls.
Does anyone have any ideas? the only thought i've had is to try and get a dremmel or similar to cut a horizontal slot or slots to give me something to get a screwdriver in...
Has anyone sorted this before? or does anyone have any ideas? i don't really want to have to replace the headset...
Thanks
Tim

Comments

  • nicklouse
    nicklouse Posts: 50,675
    tap it out from the inside (top).
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • shefbiker
    shefbiker Posts: 255
    Nick, thank you for your reply.
    I can't tap it from the inside as it is only the outer steel ring of the lower race that is stuck in the lower cup, and it's therefore not visible/accessible from the top.
    it's a real pig...
  • cooldad
    cooldad Posts: 32,599
    I think Nick means whack the bottom cup out.
    If it's rusted that bad new headset is the best solution.
    You can get decent ones on Ebay or Superstar for less than £20.
    I don't do smileys.

    There is no secret ingredient - Kung Fu Panda

    London Calling on Facebook

    Parktools
  • shefbiker
    shefbiker Posts: 255
    thank you for your replies.
    to close this out, and so that it can hopefully be of assistance to others, i obtained a dremel-type rotary tool with a mini cutting disk on it which allowed me to cut a groove in the inside surface of the section of the race that was siezed into the bottom headset cup. this gave me enough purchase to get a scredriver into it and lever the offending part out of the cup.
    i have not used a dremel-type tool before, but can thoroughly recommed one, and can see that it will come in useful when these annoying stupid issues come up in the future.
    thanks again for your advice.