Inner thread for bottom bracket is useless
05-06-23, 09:50 AM
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Inner thread for bottom bracket is useless
Hey everyone.
I need to remove the bottom bracket of this bicycle, but the threads on the right pedal aren't functional. Any ideas on how I can remove it?
Thank you!
I need to remove the bottom bracket of this bicycle, but the threads on the right pedal aren't functional. Any ideas on how I can remove it?
Thank you!
05-06-23, 09:58 AM
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Read the whole thread, but I think the problem you have so inadequately expressed (what does removing the pedals have to do with anything?) might be answered here: https://www.bikeforums.net/22879514-post20.html
05-06-23, 10:10 AM
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If you mean that you can't get the right side of the BB out, are you aware it is usually reverse thread?
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05-06-23, 11:36 AM
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I think he means the crank extraction threads are stripped.
/markp
/markp
05-06-23, 11:46 AM
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JA Stein makes a tool that oversizes the extractor threads, in the crank arm and it comes with an oversized extractor. Few shops even have one.
Some will slightly loosen the retaining bolt and ride the bike till the arm comes loose. Others have used a gear puller. I have used a hacksaw at an crossing angle to cut a slot that a pry tool can be used to open the arm's fit. I also have removed the LH arm and cup then used a heavy hammer and punch on the axle end to drive it out of the arm. Andy
Some will slightly loosen the retaining bolt and ride the bike till the arm comes loose. Others have used a gear puller. I have used a hacksaw at an crossing angle to cut a slot that a pry tool can be used to open the arm's fit. I also have removed the LH arm and cup then used a heavy hammer and punch on the axle end to drive it out of the arm. Andy
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05-06-23, 11:48 AM
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05-06-23, 11:56 AM
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OK cool, thanks for clarifying. when you cannot post pictures, clear communication is key if you want help.
this is probably the single biggest problem with BF in fact - ambiguous language and no pictures to help your friends here understand how we can help you !
Not blaming you in any way ! just stating my opinion
while the JA Stein tool is great, it is expensive for a single use tool if you're not a shop. here's what I would do to address this :
Loosen the crankbolts about 1 turn so they are loose. And then go for an easy ride around the block. A couple hundred yards.
and then you should find that they are loose enough to remove by hand. Maybe try prying with a soft lever like a hammer handle.
This is probably the easiest way to remove them without resorting to pulley removers, wedges, etc.
Good luck and report back
/markp
this is probably the single biggest problem with BF in fact - ambiguous language and no pictures to help your friends here understand how we can help you !
Not blaming you in any way ! just stating my opinion
while the JA Stein tool is great, it is expensive for a single use tool if you're not a shop. here's what I would do to address this :
Loosen the crankbolts about 1 turn so they are loose. And then go for an easy ride around the block. A couple hundred yards.
and then you should find that they are loose enough to remove by hand. Maybe try prying with a soft lever like a hammer handle.
This is probably the easiest way to remove them without resorting to pulley removers, wedges, etc.
Good luck and report back
/markp
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05-06-23, 03:38 PM
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05-07-23, 08:00 AM
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This is a pretty reliable method, but take care to not go too far from home, as you'll want to walk the bike back to avoid damaging the crank arm by riding with it loose.
05-07-23, 08:14 AM
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05-07-23, 09:48 AM
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05-07-23, 02:55 PM
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Or use a pickle fork. Just about any auto parts store should have them. No waiting.
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05-07-23, 08:56 PM
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Or use a pickle fork. Just about any auto parts store should have them. No waiting.
05-08-23, 01:09 AM
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05-08-23, 07:53 AM
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05-08-23, 04:09 PM
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or Harbor Freight and save a few dollars https://www.harborfreight.com/16-in-...+rod+separator
https://www.autozone.com/tools-and-e...t/loan-a-tools
05-08-23, 06:00 PM
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Or you loosen the bolt and ride the bike and need no tools at all.
05-08-23, 09:25 PM
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Aluminum expands easily with heat. Use a cheap propane torch on the crank arm for about 30 seconds near the BB but don't heat the BB. Rotate the crank arm to evenly distribute the heat. Then spray penetrating lube into the hole. Then use a mallet on the back and smack it off. Don't be gentle. It will work. The AL will expand and the steel of the BB will not expand leaving room for the penetrating lube to suck in. The heat will suck it in. Basics of removing stuck parts 101. Every single auto or aircraft mechanic knows this. This is basic and bread and butter knowledge.
EDIT: Get the propane torch. It is great for a multitude of things. Making creme brulee, lighting a grill, loosening stuck bolts, etc.
EDIT: Get the propane torch. It is great for a multitude of things. Making creme brulee, lighting a grill, loosening stuck bolts, etc.
05-09-23, 02:58 AM
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