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Crank removal tool for 3 piece cranks? (PIC ADDED) Please Look!
BMX1973:
Sounds a good idea, just a bit shy to try these things and cause damage :-[
I'll have a ponder and update.
--- Quote from: TwoBobRob on December 18, 2012, 08:17 PM ---You can make your own tool for pulling arms on or off. All you need is a longer bolt and a bunch of penny washers taped together.
To get your cranks apart right now, put the bolt back in the arm, but leave it a turn or two loose. give the head of the bolt a whack with a hammer - you'll see things start to move. Loosen the bolt a little more and give it another whack. Assuming it's all moving now, take the bolt out before you do any damage to the threads and as others have said, use the extension bar from a socket set (or any other decent drift) and continue knocking the axle through. Eventually a crank arm will fall off, you can then knock the axle and other arm out of the bike completely. Three piece cranks are supremely simple, the axle just sits within the bearing and can be tapped in and out easily. The whole thing is clamped in position and held tight by the crank arms.
Be sure to reassemble with a good amount of copper grease on all mating surfaces.
:)
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BMX1973:
Ah that very helpful, I'm going to steal them photo's before you copyright them >:D >:D
--- Quote from: dannywhac on December 18, 2012, 08:23 PM ---Just realised I've got these in me photobucket, might help for a spot of reference.
Profiles assembled how they'd be on a bike:
Disassembled:
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bof:
--- Quote from: BMX1973 on December 18, 2012, 08:24 PM ---Sounds a good idea, just a bit shy to try these things and cause damage :-[
I'll have a ponder and update.
--- Quote from: TwoBobRob on December 18, 2012, 08:17 PM ---You can make your own tool for pulling arms on or off. All you need is a longer bolt and a bunch of penny washers taped together.
To get your cranks apart right now, put the bolt back in the arm, but leave it a turn or two loose. give the head of the bolt a whack with a hammer - you'll see things start to move. Loosen the bolt a little more and give it another whack. Assuming it's all moving now, take the bolt out before you do any damage to the threads and as others have said, use the extension bar from a socket set (or any other decent drift) and continue knocking the axle through. Eventually a crank arm will fall off, you can then knock the axle and other arm out of the bike completely. Three piece cranks are supremely simple, the axle just sits within the bearing and can be tapped in and out easily. The whole thing is clamped in position and held tight by the crank arms.
Be sure to reassemble with a good amount of copper grease on all mating surfaces.
:)
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I would be careful using the bolt in the end method , if the cranks have been on a long time and no grease used on installation they can be a bit stubborn to remove , I would recommend using the proper tool if possible it just makes things a lot easier and safer :-)
Dark Diggler:
No local bike shop to you?
BMX1973:
There are a couple I might try if I get a chance this week.
--- Quote from: Dark Diggler on December 18, 2012, 08:45 PM ---No local bike shop to you?
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