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Is my crank set dead???
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December 23, 2024, 12:31:49 am
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Topic: Is my crank set dead??? (Read 2393 times)
Andy
Novice
Posts: 49
Karma: 0
Is my crank set dead???
«
on:
April 24, 2003, 12:49:18 am »
I know I should probably spend the lousy $40 it would cost to get a new crank set (a closeout set obviously), but I wonder if I really need to. Plus my wife was laid off, so we are a single income home right now.
My problem is, that my crank arm came loose a few times on the last ride. I used (blue) locktight, but may not have cleaned the threads properly before applying it.
I sprayed automotive brake cleaner in the BB (in the spindle where the bolt goes) and cleaned the bolt real well. I covered the bolt with locktight and cranked it down.
I'm gonna try it today, but was wondering if I'm trying too hard to save the unsalvagable.
What do you think???
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Old Proflexer
Guru
Posts: 579
Karma: 9
Re: Is my crank set dead???
«
Reply #1 on:
April 24, 2003, 01:05:44 am »
that sounds more like a bottom bracket / crank bolt issue and not necessarily the cranks - if the bolt works loose, the cranks will as well.
the bolt holds the crank arm on by screwing into the spindle. might try a new bolt with some fresh threads if the old one seems to go in too easily, try wrapping the threads with a little teflon tape, spraypaint or nailpolish and let dry the threads, rough up the threads of the bolt a bit with a file or such.
lotsa things to try before shelling out the big bucks.
OP
«
Last Edit: April 24, 2003, 02:01:30 am by Old_Proflexer
»
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Yeah, they don't make 'em anymore - it's a classic - - -
keen
Journeyman
Posts: 115
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I love YaBB 1G - SP1!
Re: Is my crank set dead???
«
Reply #2 on:
April 24, 2003, 01:06:45 am »
Are you torqueing it to spec.? 28-30 ft. lbs. After it is torqued down remove the bolt and make sure the crank arm is not bottoming on BB, if so the arm is toast.
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Carbon_Angus
Guru
Posts: 926
Karma: 2
I am full of Bull
Re: Is my crank set dead???
«
Reply #3 on:
April 24, 2003, 09:55:50 am »
i cracked two shimano XT crank arms on my 857, if ther are no cracks down there (clean it and take a look)otherwise, i agree with the BB theory.
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Irby
Apprentice
Posts: 63
Karma: 0
live to ride ride to live....(old dirtbike mantra)
Re: Is my crank set dead???
«
Reply #4 on:
April 27, 2003, 04:59:17 am »
Andy, I once saved a crankset by shimming the bottom bracket taper surfaces with pieces of aluminum from a coke can. If your crank is on it's last legs and nothing else works, give it a try. Dan
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Is my crank set dead???