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How To: Fixing bad threads rear Brake lever

Posted: Wed Apr 22, 2009 8:29 am
by bosshaug1
OK, so I fixed my mistake last night with a Permacoil kit. The size of the pivot bolt is M8x1.25 for those who care to know. I practiced on a scrap piece of aluminum before hacking into my frame. It is pretty easy to do, and here is how...

Tools needed...
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First, drill out the old threads with appropriate drill bit. In this case it is a 21/64.
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Then, blow out scrap metal with compressed air.
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Next, use a tap handle and the provided tap to cut new threads.
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Put the coil on the insert tool. Note the tang that is used to drive the coil.
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Drive the coil into the newly cut threads. Make sure you drive it far enough that no threads are exposed on the outside.

Remember that tang? You will need to remove it.
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A well placed blow with a screwdriver will pop it off.
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Finished product -good as new!
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Posted: Wed Apr 22, 2009 11:01 am
by Codeman00
Nice work!

I think more of my problem was a boogered screw thread at the end of the screw. I had my machinist here at work turn the first three threads off the end of the screw and fix the lead-in...hopefully that will work. Luckily I didn't take all of the threads out with my kotter pin mistake.

Posted: Thu Apr 23, 2009 5:48 am
by topgun
Nice job and apologies for sounding like a wise a$$ ....

Posted: Thu Apr 23, 2009 8:12 am
by bosshaug1
No worries mate, I didn't take it personally, I just hate all Australians now :lol: :lol: :lol: :lol: :lol:

Posted: Thu Apr 23, 2009 2:17 pm
by IamTheCowboy
Bosshaug, super job on the photos! I admire people who take the extra time while doing a project to help others! Hopefully others will be able to benefit because of your post!!

Posted: Thu Apr 23, 2009 4:55 pm
by 450xdirt
Yeah thanks for the photos. I almost did the same thing but stopped when it started feeling tight. :lol:

Posted: Wed Mar 16, 2011 5:25 pm
by dlpmx
might want to use a little Loc-Tite on that insert.

Dale

Posted: Wed Mar 16, 2011 6:03 pm
by crfsonly
dlpmx wrote:might want to use a little Loc-Tite on that insert.

Dale


great suggestion dale.