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Help, stripped allen head

Discussion in 'XJ Modifications' started by mojo, Apr 8, 2013.

  1. mojo

    mojo Member

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    Rebuilding the brake calipers. I was removing the allen head screw that holds the pads in the front brake, and it came out about 3-4 threads and locked up. wouldn't go either way. I had soaked everything with break free for about 45 mins before starting, and it finally stripped the allen "hole" out. I tapped in the next size wrench and it stripped out too. Any ideas? Thanks in advance.
     
  2. Myro

    Myro Member

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    i would cut in a deep Philips or Flathead or you can us a pair of Vice Grips needle nose or traditional and when working it out if you think the bolt is gettting hot and might snap take a break let it "cool off"
     
  3. 750E-II_29Rbloke

    750E-II_29Rbloke Active Member

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    Don't know why it locked up so suddenly but perhaps if you could get a dremel in there & cut a screwdriver slot into it & give it a gentle "persuade" with an impact wrench?

    I'd be wondering though what caused it to lock up so tight & trying to rectify this too, as you don't want to damage the caliper forcing it... perhaps localised heating may help too/

    EDIT-: beaten to the punch! What he said ^^ :D
     
  4. chacal

    chacal Moderator Moderator Supporting Vendor Premium Member

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    The pad retaining pins on the 650 Turbo/750 Maxim calipers is a BEAST, they are next to impossible to break free and then still require quite a bit of torque to remove. LOTS of penetrating oil, judicious application of heat on the caliper body, and a cheater bar on the allen key wrench is what typically works (lots of bad words help, too......) .

    I've literally had to apply almost 100 ft-lbs of torque to break those things free. It's just a poor design on the caliper, the pin, or both.
     
  5. jmilliken

    jmilliken Well-Known Member

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    TRY KROIL TOO!
     
  6. 750E-II_29Rbloke

    750E-II_29Rbloke Active Member

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    The main problem here though is the stripped out allen bolt head :cry: I don't know if the dremel slotting idea would work now you mention up to 100ft/lbs though :? Must be worth a try?
     
  7. biggyfaction

    biggyfaction Member

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    This is why i use antiseize when i put stuff together. good thought for when you get it out.
     
  8. sebwiers

    sebwiers Active Member

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    Weld a nut to the head, slip a socket over the nut, use an impact wrench (the hand driven kind by pref). The heat from the welding helps break the bolt free.
     

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