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39mm fork rebuild problems

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  #1  
Old 02-02-2018 | 09:04 PM
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Default 39mm fork rebuild problems

the 6mm bottom hex bolts on both of my lowers are completely locked up. Anyone with any suggestions on how to get them loose? getting ready to drill the heads off them
 
  #2  
Old 02-02-2018 | 09:18 PM
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You using a rattle gun?
 
  #3  
Old 02-02-2018 | 10:26 PM
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Originally Posted by justintime6423
the 6mm bottom hex bolts on both of my lowers are completely locked up. Anyone with any suggestions on how to get them loose? getting ready to drill the heads off them
You have to use an air driven impact to get those out.
Any thing else and the bolt just spins in place without loosening.
 
  #4  
Old 02-03-2018 | 05:13 AM
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You do still have the fork caps and springs installed; right? If not, do so or use the proper tool to hold the damper rod from spinning. In a pinch a broom handle will work. If the ratchet and M6 hex bit won't break it loose it is indeed time for an impact. Mine is electric (corded) and it gets the job done if I have trouble. One note, I never use long ball end bits on fork legs, square end only and of good quality. The ball end usually mauls the head a little. Also, cheap hex bits, especially long ones, don't impart all the torque to the fastener. I use Snap On but there are other good brands out there.
 
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Old 02-03-2018 | 09:39 AM
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Originally Posted by Nomadmax
You do still have the fork caps and springs installed; right? If not, do so or use the proper tool to hold the damper rod from spinning. In a pinch a broom handle will work. If the ratchet and M6 hex bit won't break it loose it is indeed time for an impact. Mine is electric (corded) and it gets the job done if I have trouble. One note, I never use long ball end bits on fork legs, square end only and of good quality. The ball end usually mauls the head a little. Also, cheap hex bits, especially long ones, don't impart all the torque to the fastener. I use Snap On but there are other good brands out there.
Yeah I forgot about the corded ones which is even worse because I have one!!

I do know the battery operated ones don't have enough torque to get the bolt free, at least mine doesn't. 20v Dewalt.

As for the ball end mauling the head a little when I tried one it stripped the head immediately. Then I had no choice but to drill it out.
 
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  #6  
Old 02-03-2018 | 09:58 AM
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yeah guess i'm just SOL, will drill em out. The seals failed me a good....maybe 50k miles ago what else should i expect
 

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  #7  
Old 02-03-2018 | 10:26 AM
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Originally Posted by justintime6423
yeah guess i'm just SOL, will drill em out. The seals failed me a good....maybe 50k miles ago what else should i expect
You won't really know what else until you take it apart and look.
 
  #8  
Old 02-03-2018 | 10:28 AM
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Originally Posted by justintime6423

yeah guess i'm just SOL, will drill em out. The seals failed me a good....maybe 50k miles ago what else should i expect
 
  #9  
Old 02-03-2018 | 12:14 PM
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I take back everything I said. Use a Sawzall, then Craigslist a set of take off forks
 
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  #10  
Old 02-03-2018 | 02:17 PM
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I had success with a long set of Harbor Freight impact ball headed wrenches and a pneumatic impact
 


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