Thread: Cotter pins are out but one of the crank arms won’t come off.
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Old 09-28-25 | 05:32 PM
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Esos1
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From: Central Massachusetts

Bikes: 1987 Miyata 615gt, 1980/81 Lotus Eclair, Trek 420, 1975 Motobecane Grand Jubile

Originally Posted by Bill Kapaun
Have you tried applying some Penetrating Oil and letting soak a bit?
Repeat a couple 3 times after 20-30 minutes.
Then, tap on the inside with the end of a large box end wrench or similar.
OR
Reinstall other crank.
With bike upside down, position the cranks horizontally and push down with your weight.
Rotate 180 degrees and..... repeat as needed.
Yep, at least 2 times but I’ll repeat again tonight before going to bed, have it soaking right now with that crank arm face down. At least I hope it’s soaking
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