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PostPosted: Thu Oct 31, 2013 6:04 pm 
Gold Trader / PoTM Winner / RB Rider
Gold Trader / PoTM Winner / RB Rider
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Joined: Tue Feb 26, 2013 6:26 pm
Posts: 16929
Location: 54 Festive Road Winchcombe GLOUCS Yarp...
Trying to take off the left side arm on my MF to change the bb.

Other side was fine. Stripped an extractor trying to move this one. No joy. Will get another later. Bike on side and soaking. Any suggestions gratefully received.

:facepalm: thanks THM


Last edited by The History Man on Thu Oct 31, 2013 6:34 pm, edited 1 time in total.

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PostPosted: Thu Oct 31, 2013 6:12 pm 
retrobike rider
retrobike rider
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Joined: Fri Mar 13, 2009 7:19 pm
Posts: 3133
Location: Leeds, for ages!
Assuming the arms are not painted, I would try blow torching the arm and then having another go with new extractor.

If the arm is nothing special, generic sort of thing, i would cut it off and look for another. If you track close to bb spindle until a chunk is removed from the most chunky side(opposite to pedal end), then rock it up down to stretch it free, done it before, takes ten minutes with good hacksaw blades.


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PostPosted: Thu Oct 31, 2013 6:12 pm 
Gold Trader / MacRetro rider
Gold Trader / MacRetro rider

Joined: Thu May 06, 2010 10:05 pm
Posts: 5650
Location: Aberdeen
Try a different crank extractor.
Try some Plusgas or penetrating oil.
try and MTFU :wink:

How on earth did you manage to strip the extractor and not the crank threads?


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PostPosted: Thu Oct 31, 2013 6:30 pm 
Gold Trader / PoTM Winner / RB Rider
Gold Trader / PoTM Winner / RB Rider
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Joined: Tue Feb 26, 2013 6:26 pm
Posts: 16929
Location: 54 Festive Road Winchcombe GLOUCS Yarp...
A good question. Sugino cranks are obviously tough stuff.

Soaking overnight. May pop to the big orange place and get another extractor ready for the morning. I suppose you keep the other side oiled when you do a bit on the sprockets etc over the years. That came off with no problem.


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PostPosted: Thu Oct 31, 2013 6:38 pm 
Gold Trader / PoTM Winner / RB Rider
Gold Trader / PoTM Winner / RB Rider
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Joined: Tue Feb 26, 2013 6:26 pm
Posts: 16929
Location: 54 Festive Road Winchcombe GLOUCS Yarp...
Shall I go and get one of these then?

http://www.halfords.com/webapp/wcs/stor ... yId_242558


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PostPosted: Thu Oct 31, 2013 6:51 pm 
Gold Trader / MacRetro rider
Gold Trader / MacRetro rider

Joined: Thu May 06, 2010 10:05 pm
Posts: 5650
Location: Aberdeen
Might as well invest in something purposeful and that should last you for many years to come.


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PostPosted: Thu Oct 31, 2013 7:56 pm 
Retro Guru
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Joined: Sun Mar 14, 2010 2:33 am
Posts: 2922
Location: daaan saaaf
I had a cheap, no-name crank extractor and it stripped the threads in a crank arm. I then bought a good Shimano one that was a much more secure fit and I was able to remove the crank arm that was previously stripped by the cheap extractor.

http://www.chainreactioncycles.com/shim ... rp-prod671


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PostPosted: Thu Oct 31, 2013 7:58 pm 
Retro Guru

Joined: Sat Dec 03, 2005 11:16 pm
Posts: 300
Location: Bristol uk
+1 for heat.

Heat, plus gas, heat. It will go.


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PostPosted: Thu Oct 31, 2013 8:03 pm 
Gold Trader / PoTM Winner / RB Rider
Gold Trader / PoTM Winner / RB Rider
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Joined: Tue Feb 26, 2013 6:26 pm
Posts: 16929
Location: 54 Festive Road Winchcombe GLOUCS Yarp...
Just bought the park tools one from wiggle. Figure it will give the gt85 a couple of days to do its stuff. Also have a heat gun.


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PostPosted: Thu Oct 31, 2013 8:42 pm 
retrobike rider / Gold Trader
retrobike rider / Gold Trader
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Joined: Sun Nov 23, 2008 10:44 pm
Posts: 3265
Location: Rushden......ish
If the cranks aren't that important then ride it without a crank bolt. shouldn't take long to come off but a slight chance of damaging the tapers.


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