That vintage cotter pin crank arm wouldn't budge for ages

I had this classic bike come in with a seized crank arm. Tried penetrating oil for days with no luck. Today I made a custom puller from some old parts and it popped right off. Feels great to solve a puzzle like that. Customer is gonna be thrilled to see it fixed.

3 comments

3 Comments

the_linda1mo ago

Honestly building your own tool is half the fun of fixing old stuff. I once made a drift punch from a bolt and a socket to knock out a frozen pedal spindle. It's about seeing what you have and making it work. That feeling when your janky homemade tool actually does the job is better than any new part.

hugo_cooper431mo ago

Holy cow, you made a custom puller from OLD parts and it WORKED? That is UNREAL after days of oil doing nothing. @jaken28 mentioned heat, but beating a seized cotter pin with a homemade fix is just wild. I always assume those vintage cranks are toast once they stick that bad. Your patience to build a tool instead of forcing it is seriously impressive. That customer is lucky you didn't give up and try something drastic. Fixes like that are why old bikes still ride at all.

jaken281mo ago

Ever try a little heat on things like that? I used to think special tools were the only right way, but seeing a homemade fix work so well really changes your mind. Sometimes the old ways just need a clever push.