Help! Crank puller stripped thread
I've just tried to swap a chainset.
The LHS crank came off with no problems, but whilst trying to get my chain-side crank off the crank puller stripped the thread clean out!
What I mean is, when I tightened it up the crank pulller came out and the crank stayed where it was! :shock:
I do vaguely remember the bike-shop-lad mentioning that they'd had some problems with fitting my bottom bracket a few years ago, and I wonder now if this is what he meant, and perhaps the thread on the RHS was already weakened. :?
Any suggestions on how to remove a crank without being able to use a crank puller, short of resorting to brute force with a screwdriver and hammer?
Help!
The LHS crank came off with no problems, but whilst trying to get my chain-side crank off the crank puller stripped the thread clean out!
What I mean is, when I tightened it up the crank pulller came out and the crank stayed where it was! :shock:
I do vaguely remember the bike-shop-lad mentioning that they'd had some problems with fitting my bottom bracket a few years ago, and I wonder now if this is what he meant, and perhaps the thread on the RHS was already weakened. :?
Any suggestions on how to remove a crank without being able to use a crank puller, short of resorting to brute force with a screwdriver and hammer?
Help!
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Comments
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A 2-prong ball-joint splitter between the frame and the spiderMake mine an Italian, with Campagnolo on the side..0
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ride_whenever wrote:do you want to keep the cranks?
They 'were' from a perfectly fine Campag Veloce 53/39, albeit from a the older square bracket.
Bugger...
The ball-joint splitter sound like it'll muller the bracket and scratch up the crank. Oh well. These things happen I guess.0 -
When using the splitter try using some cloth such as a cotton rag over the prongs so you don't have metal to metal graunching to minimise damage to the spider or frame BB surface.Life is like a roll of toilet paper; long and useful, but always ends at the wrong moment. Anon.
Think how stupid the average person is.......
half of them are even more stupid than you first thought.0 -
heat up the grank with a blowtorch- aluminiums coefficient of expansion is much higher that the steel of the axle
i did this with an ultegra c/set that was stripped like yours- i only heated it for 2-3 mins anthe crank fell off the axle - the crank was undamaged by the heat treatment
this does not work for carbon cranks!'dont forget lads, one evertonian is worth twenty kopites'0 -
I had exactly the same problem a year or so ago and asked the same question on here
The solution was simple, go for a ride and wait until the crank drops off ..... took two miles.
Worth a try?Oh and please remember to click on my blog:
http://americanbicyclegroup.wordpress.com
The more clicks I get the higher it creeps up the google radar0 -
Will stick it on the turbo tonight and give it a go.
Cheers0 -
roy_batty wrote:Will stick it on the turbo tonight and give it a go.
Cheers
Before I went out I had hammered it, tried to lever it off and screamed at it )
I was suprised when it dropped off so quickly.Oh and please remember to click on my blog:
http://americanbicyclegroup.wordpress.com
The more clicks I get the higher it creeps up the google radar0 -
I've used a three legged gaer puller on the spider. Pulled it off fairly easily. Just takes a little concentration to align it properly.Recipe: shave legs sparingly, rub in embrocation and drizzle with freshly squeezed baby oil.0
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It's off!
Now I need to get the old botttom bracket off - it doesn't match any of the Campag tools I bought. :oops:
Can I knock this off with a hammer and screwdriver? Bracket is f*cked anyway.0