So what the heck am I doing wrong?
04-26-21, 04:41 PM
#1
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So what the heck am I doing wrong?
Trying to take the crank off my FSA crankset and it will not budge. I know the direction the nut has to turn. I have watched the videos on Youtube and they use hand pressure and it comes off easily. I am using an impact
driver and have soaked the nut with penetrating oil and it will not budge. What am I doing wrong? Any ideas are welcome as I am about to cut it off with a reciprocating saw. Only kidding but I am frustrated.
Any ideas?
Frank.
driver and have soaked the nut with penetrating oil and it will not budge. What am I doing wrong? Any ideas are welcome as I am about to cut it off with a reciprocating saw. Only kidding but I am frustrated.
Any ideas?
Frank.
04-26-21, 06:13 PM
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More torque You're looking at 40 nm or about 30 ft/lb on it.
https://www.bikeforums.net/bicycle-m...oval-help.html
https://www.bikeforums.net/bicycle-m...oval-help.html
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04-26-21, 08:00 PM
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more leverage, no impact driver
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(looking for Torpado Super light frame/fork or for Raleigh International frame fork 58cm)
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04-26-21, 08:33 PM
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04-26-21, 08:53 PM
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Static fittings friction is generally greater then dynamic friction. So a tighten torque value is usually less then the loosening amount.
Also penetrating fluids are really poor lubricating ones. So replacing the lube between the bolt and the LH threaded cap could have further increased the friction between them, this added to the "stiction" of the axle and arm fit can add up to be pretty high. Andy
Also penetrating fluids are really poor lubricating ones. So replacing the lube between the bolt and the LH threaded cap could have further increased the friction between them, this added to the "stiction" of the axle and arm fit can add up to be pretty high. Andy
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04-26-21, 11:52 PM
#8
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The solution is leverage, not an impact driver.
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04-27-21, 12:05 AM
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The solution is a lot more leverage, with something to securely support what you are trying to loosen and your tool. Impact drivers, while they have their uses, are brutish devices that dissipate your energy in all kinds of directions. Many eons ago, when I was a car mechanic back in the days when an air wrench was used almost solely to remove wheel nuts (yes, that long ago...), the company impact drivers rarely saw the light of day while our lever bars wouldn't have shamed a post-apocalyptic warrior's great grandson.
If your tool can take it, a scaffold tube is always an option
If your tool can take it, a scaffold tube is always an option
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04-27-21, 02:01 AM
#10
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Add a long tube to the end of the hex key to have more leverage. It should work.
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04-27-21, 07:52 AM
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Thanks all. Will pick up an 8mm on 3/8" drive and lay into it.
Frank.
Frank.
04-27-21, 08:34 AM
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I recommend taking off the self extracting ring and use a proper crank extractor tool in this case. If the crank is not coming off without a lot of force there is a good chance you'll ruin the SE ring and possibly strip some of the threads on the crank arm.
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04-27-21, 08:45 AM
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Is the bolt stuck and won't loosen from the crank shaft, or is the bolt tightening against the self removal ring and then getting tight? On my RaceFace crank arm, there is a turn or two of the bolt before it tightens against the self removal ring. But it didn't take much torque to get the crank arm off.
You are turning the wrench counter clockwise as the arrow on the removal ring shows?
Sometimes trying to tighten a bolt will move it enough to break the stiction and it'll be easier to loosen. Just don't over torque it too much.
You are turning the wrench counter clockwise as the arrow on the removal ring shows?
Sometimes trying to tighten a bolt will move it enough to break the stiction and it'll be easier to loosen. Just don't over torque it too much.
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04-27-21, 03:28 PM
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So leverage is my new favorite word. 8mm Allen and a 30" piece of 3/4" iron pipe done. Now to find out what the bottom bracket dimension is and I can order my new crank and BB.
Thank you all for the information. I blocked the crank arm and put my 190 lbs on the pipe and the rest is history. Fantastic.
Frank.
Thank you all for the information. I blocked the crank arm and put my 190 lbs on the pipe and the rest is history. Fantastic.
Frank.
Last edited by Helderberg; 04-27-21 at 03:51 PM.
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04-28-21, 05:56 AM
#16
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So leverage is my new favorite word. 8mm Allen and a 30" piece of 3/4" iron pipe done. Now to find out what the bottom bracket dimension is and I can order my new crank and BB.
Thank you all for the information. I blocked the crank arm and put my 190 lbs on the pipe and the rest is history. Fantastic.
Frank.
Thank you all for the information. I blocked the crank arm and put my 190 lbs on the pipe and the rest is history. Fantastic.
Frank.
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