Crank puller nut stuck
#1
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Joined: Sep 2012
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From: Lexington Park, Maryland
Bikes: Current: Origami Crane 8, Trek 1200 Former: 2012 Schwinn Trailway
Crank puller nut stuck
SO that detachable nut that gets threaded onto the crank arm before using the crank bit has gotten stuck in the crank arm. Used a fixin' pipe to get the arm off in the first place, which was probably bad procedure. Tried using some spray lube but no luck. Trash it?
M.
M.
#2
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Joined: Sep 2010
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From: Roswell, GA
Bikes: '93 Trek 750, '92 Schwinn Crisscross, '93 Mongoose Alta
Try some Kroil or PB Blaster, time for it to soak in and a judicious application of heat to the crank arm. Not sure what a "fixin' pipe" is or what you did with it, but you shouldn't have to use much more than finger tightness to thread the nut into the crank.
#3
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Joined: Apr 2009
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From: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
I'm not clear whether you used the cheater bar to tighten the body into the crank, or to later remove the crank.
Either way, penetrating oils may or may not help because they're more effective on corroded threads than ones mechanically jammed. When threads a re jammed, the threads distort. This can also happen when great pressure is exerted when the spindle is pushed out. The best bet, if it's practical, is an impact wrench, who's jolting action does a better job on torque jammed threads than steady torque.
If you only used the cheater bar to remove the crank you have another option, which is to use a soft face or deadblow hammer to drive the remover body in toward the crank, hoping to unjam a distorted thread. But this won't help if the remover is already jammed against the bottom by being tightened with the cheater bar.
Either way, penetrating oils may or may not help because they're more effective on corroded threads than ones mechanically jammed. When threads a re jammed, the threads distort. This can also happen when great pressure is exerted when the spindle is pushed out. The best bet, if it's practical, is an impact wrench, who's jolting action does a better job on torque jammed threads than steady torque.
If you only used the cheater bar to remove the crank you have another option, which is to use a soft face or deadblow hammer to drive the remover body in toward the crank, hoping to unjam a distorted thread. But this won't help if the remover is already jammed against the bottom by being tightened with the cheater bar.
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FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
#4
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Joined: Aug 2007
Posts: 1,033
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From: Belgium
SO that detachable nut that gets threaded onto the crank arm before using the crank bit has gotten stuck in the crank arm. Used a fixin' pipe to get the arm off in the first place, which was probably bad procedure. Tried using some spray lube but no luck. Trash it?
M.
M.
most folks who run into problems with crankarm pullers find that they pull the threads right out of the crank arm so it should not be too much of a fuss to get the puller out if you have enough leverage.
-j
#5
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Joined: Sep 2012
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From: Lexington Park, Maryland
Bikes: Current: Origami Crane 8, Trek 1200 Former: 2012 Schwinn Trailway
I finger tightened the nut, then used a wrench - took the instructions on the back of the package a little too seriously. The "Fixin' Pipe" was used to get the crank arm off - my arms couldn't do it, even with my body weight.
I'm wondering - if I end up dicking up this crank arm, if it wouldn't be better to just get new crankset and BB with those much improved releases I've seen mentioned. Then again, it might be pearls on swine, as this is a Schwinn.
M.
I'm wondering - if I end up dicking up this crank arm, if it wouldn't be better to just get new crankset and BB with those much improved releases I've seen mentioned. Then again, it might be pearls on swine, as this is a Schwinn.
M.
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