Schwinn GTX3 Crank arms won’t come off
04-19-20, 08:01 PM
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Schwinn GTX3 Crank arms won’t come off
I have a Schwinn Gtx 3 and am trying to replace the crank arms. I’ve removed the bolts and can’t separate the crank arms and gear assembly from the frame. Am I missing something? Thanks.
04-19-20, 09:23 PM
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You have a bike with three-piece cranks. From your description it sounds like you need a crankarm extractor to remove the crank arms. Here's instrucitons:
https://www.parktool.com/blog/repair...on-three-piece
https://www.parktool.com/blog/repair...on-three-piece
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04-20-20, 06:18 AM
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I have already gotten the initial bolt off with a simple socket wrench. I guess I am not sure what this tool is supposed to do once the initial bolt is removed. Does it loosen up an interior piece so the crank can be removed?
04-20-20, 06:31 AM
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It's a tapered press fit so it takes a puller to remove the crank arm, not something that just pops off.
04-20-20, 06:53 AM
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Replacement part one piece crank arm and gears.
Stuck crank arm.
Replacement pieces.
04-20-20, 07:05 AM
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Those tapered press fits are very tight and require a specific screw press tool to pull them off.
04-20-20, 07:26 AM
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You could try taking a safe, leisurely ride around the neighborhood or in an empty parking lot with the bolt still removed and see if the crank arms come loose. I have heard of people doing this who don't own a crank puller.
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04-20-20, 07:33 AM
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04-20-20, 11:28 AM
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If you have a decent LBS take it to them with the bolts out.....ask how much they would charge to remove cranks.....from what I can see in the pix. .unless they run into some kind of problem (I can't imagine any) it would take them about 5 minutes.
04-20-20, 10:45 PM
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@Spangen7628, make sure you tighten the bolts very well when you re-install. Torque wrench is preferred, but if none available get those bolts nice and tight, then ride for a while, then see if you can give them another 30° turn or so. Don't force it though. Make sure it's not bottoming out on the tapers.
Last edited by LesterOfPuppets; 04-20-20 at 11:03 PM.
04-21-20, 01:17 AM
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https://www.amazon.com/Park-Tool-CCP...1&rps=1&sr=8-2 is the right tool, or buy something for <$10 if you're only using it once or twice. This has been the most common way for bicycle cranks to work since, I dunno, the 60s or earlier? It is a bike specific tool but hardly custom.
