Tool fit or not

wanderling · 2012-01-22, 10:44 PM

Sometimes I don't know which sub-forum to post a topic in, this is an example.
It seems like RSU is a catch-all, so here it is.

Here is a cheap crank puller:
http://www.ebay.com/itm/350483658583...84.m1497.l2649
Can anyone tell if this will work on a square-taper hub, e.g. the original Coker?
I compare this to similar Park tool and the ends look different, that's why I ask.

tpv · 2012-01-22, 11:01 PM

Yes, this one is for square-taper.

saskatchewanian · 2012-01-22, 11:05 PM

The extractor part should work... but I don't get how you would use the handle/wrench without taking the thing apart first.

wanderling · 2012-01-23, 12:25 AM

Quote:

Originally Posted by saskatchewanian

The extractor part should work... but I don't get how you would use the handle/wrench without taking the thing apart first.

Yeah: if you take apart the silver and black pieces, you can use the wrench on the inward-facing part of either piece.

I have this particular extractor and cannot (for the love of God) figure it out. So I remove the screw, put the black part into the crank, and turn the silver part towards (into) the hub and it'll push the crank apart? Feeling pretty dumb here; someone with more mechanical talent please let me stand on your shoulders.

tpv · 2012-01-23, 12:35 AM

Quote:

Originally Posted by wanderling

Yeah: if you take apart the silver and black pieces, you can use the wrench on the inward-facing part of either piece.

I have this particular extractor and cannot (for the love of God) figure it out. So I remove the screw, put the black part into the crank, and turn the silver part towards (into) the hub and it'll push the crank apart? Feeling pretty dumb here; someone with more mechanical talent please let me stand on your shoulders.

You remove the screw. The "black part" goes into the crank, I'd recommend greasing it beforehand, that will make it easier to remove. So you grease it a little, and screw it in the crank, as deep as you reasonably can. Then you can begin to turn the "silver part", I never had a handle, always did it with an allen key (I hope it's the right name in english

). Just do it until it pulls the crank off, than remove the puller from the crank.

wanderling · 2012-01-23, 12:46 AM

Quote:

Originally Posted by tpv

You remove the screw. The "black part" goes into the crank, I'd recommend greasing it beforehand, that will make it easier to remove. So you grease it a little, and screw it in the crank, as deep as you reasonably can. Then you can begin to turn the "silver part", I never had a handle, always did it with an allen key (I hope it's the right name in english

). Just do it until it pulls the crank off, than remove the puller from the crank.

Hex key, Allen key, Allen wrench.

So the silver part pushes the crank off the hub? I must not be turning hard enough then. The handle is less than ideal because it cuts into your hand when pushing or pulling hard.

wanderling · 2012-01-23, 12:50 AM

Found answer by semach.the.monkey in this thread:http://www.unicyclist.com/forums/showthread.php?t=79348
Will try when home (this time with socket wrench).

johnfoss · 2012-01-23, 05:48 AM

The important part is to make sure you get as many of the threads on that black part in there before screwing in the silver part. You want lots of grip so you don't damage the threads. You could toss the handle that came with it and just use any old wrench that fits the hex part. The pullers I use are essentially just the black & silver part of yours.

aracer · 2012-01-23, 10:56 PM

Also make sure you've removed any washers so it is pushing directly on the end of the axle.

2012-01-22, 10:44 PM	#1
wanderling Registered User Join Date: Jul 2011 Posts: 85	Tool fit or not Sometimes I don't know which sub-forum to post a topic in, this is an example. It seems like RSU is a catch-all, so here it is. Here is a cheap crank puller: http://www.ebay.com/itm/350483658583...84.m1497.l2649 Can anyone tell if this will work on a square-taper hub, e.g. the original Coker? I compare this to similar Park tool and the ends look different, that's why I ask. Last edited by wanderling; 2012-01-22 at 10:45 PM.

2012-01-22, 11:05 PM	#3
saskatchewanian ERIC P Join Date: Jan 2007 Location: Denare Beach, Saskatchewan, Canada Age: 27 Posts: 5,244	The extractor part should work... but I don't get how you would use the handle/wrench without taking the thing apart first. __________________ My friends, love is better than anger. Hope is better than fear. Optimism is better than despair. So let us be loving, hopeful and optimistic. And we’ll change the world. - Jack Layton

2012-01-23, 05:48 AM	#8
johnfoss North Shore ridin' Join Date: Apr 2002 Location: Carmichael, CA Posts: 14,932	The important part is to make sure you get as many of the threads on that black part in there before screwing in the silver part. You want lots of grip so you don't damage the threads. You could toss the handle that came with it and just use any old wrench that fits the hex part. The pullers I use are essentially just the black & silver part of yours. __________________ John Foss "jfoss" at "unicycling.com" www.unicycling.com "Unicycling is a way of looking at the world, making a choice to slow down, finish what you start, doing things not because they're easy, but because they're a challenge." -- Nurse Ben

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2012-01-22, 11:01 PM	#2
tpv Registered User Join Date: Dec 2011 Location: Hungary Posts: 19	Yes, this one is for square-taper.

2012-01-23, 12:50 AM	#7
wanderling Registered User Join Date: Jul 2011 Posts: 85	Found answer by semach.the.monkey in this thread:http://www.unicyclist.com/forums/showthread.php?t=79348 Will try when home (this time with socket wrench).

2012-01-23, 10:56 PM	#9
aracer Registered Unicyclist Join Date: Oct 2011 Location: Malvern, UK Age: 43 Posts: 1,038	Also make sure you've removed any washers so it is pushing directly on the end of the axle.

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