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 Post subject: Re:
PostPosted: Thu Aug 09, 2018 9:15 am 
Old School Hero

Joined: Wed Jun 03, 2015 1:43 pm
Posts: 242
Some of these may work


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 Post subject: Re:
PostPosted: Thu Aug 09, 2018 9:19 am 
retrobike rider
retrobike rider
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Joined: Wed Apr 15, 2009 1:08 pm
Posts: 3782
Location: Woking
On stripped cranks previously I've used a hot air paint stripper gun and when they're nicely up to temperature, a good whack with a rubber mallet got them off.

SP


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PostPosted: Thu Aug 09, 2018 9:35 am 
Retro Guru

Joined: Mon Apr 03, 2006 5:11 pm
Posts: 1178
Heat gun or blow torch to the crank, go easy with the blow torch. Put tension on with the tool first and some considered smacks with a hammer + punch. Mount the frame in a vice first.

Ball joint splitter is a good call to avoid stripping threads.

Shocking helps - on car ball joints (also often a taper fit steel in alloy) you will put tension on with the splitter, then smack it with a hammer to get it to release.


Otherwise a grinder is quickest, if they aren't particularly special cranks.


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 Post subject: Re:
PostPosted: Thu Aug 09, 2018 11:41 am 
retrobike rider
retrobike rider

Joined: Mon Sep 27, 2010 12:17 am
Posts: 1061
Location: At The Gates Of Dawn
brocklanders023 wrote:
Not yet mate but will now. :D


+1 :)


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 Post subject: Re:
PostPosted: Thu Aug 09, 2018 9:48 pm 
retrobike rider / Gold Trader
retrobike rider / Gold Trader
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Joined: Fri Feb 06, 2009 11:13 pm
Posts: 10849
Location: Skipton
Thanks all, I will report back. 8)


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 Post subject: Re:
PostPosted: Mon Oct 15, 2018 4:45 pm 
retrobike rider / Gold Trader
retrobike rider / Gold Trader
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Joined: Fri Feb 06, 2009 11:13 pm
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Well, half a dozen kettles of boiling water and bashing it with a hammer haven't worked. :facepalm:

Would a hair dryer create enough heat I wonder?


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 Post subject: Re:
PostPosted: Wed Oct 17, 2018 9:33 am 
Dirt Disciple

Joined: Sun Apr 30, 2017 7:01 pm
Posts: 82
Do you have a photo of it? I have managed to do a few simply by cutting through the bottom bracket with a grinder, sit the back of the crank on a socket - 15-20mm should do - and then just knock the piece out with suitable drift and hammer. Also, if it's a loose bb, you can remove the opposite cup then just use the frame as your 'socket' without cutting the bb.


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 Post subject: Re: Re:
PostPosted: Wed Oct 17, 2018 9:47 am 
Old School Grand Master

Joined: Mon Feb 11, 2008 9:42 am
Posts: 3120
brocklanders023 wrote:
Well, half a dozen kettles of boiling water and bashing it with a hammer haven't worked. :facepalm:

Would a hair dryer create enough heat I wonder?

Hair drier is unlikely to put enough heat into it. Paint stripping gun would.

Surprised that hot water didn't work. Must be *really* wedged on there.


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 Post subject: Re:
PostPosted: Wed Oct 17, 2018 1:14 pm 
retrobike rider / Gold Trader
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Joined: Fri Feb 06, 2009 11:13 pm
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Location: Skipton
Yep, well stuck on. :facepalm:

I have a ball joint separator to try next with a big hammer. :D :facepalm:


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PostPosted: Wed Oct 17, 2018 1:19 pm 
Gold Trader / MacRetro rider
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Joined: Sun May 25, 2008 11:03 am
Posts: 19036
Location: Sunny Glasgow
Soak it in diesel.


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