Crank Jelp!!!!!!!!!!!!!!!!!!!!!!!!!!

[Chicago Punk]

For the life of me I cant get the crank off the bike.I got the round cylinder with the threads on it to come out but I can get the crank off.How can I get this darn thing off?

 

[user 135]

3 piece crank more than likely.
You need a crank puller.

http://www.parktool.com/repair/readhowto.asp?id=103

 

[Bunbury]

Avoid the temptation to improvise, 3-piece cranks are easy to damage if you don't have the right tool. Your LBS should be able to sell you the crank puller that cman mentioned for around $20.

 

[karfer67]

also make sure you know what style cranks you have. more than likely you have square taper (that is when you look in the hole is the spindle square?) so make sure you know what you have before getting the wrong tool. the newer splined cranks use a different tool.

 

[Chicago Punk]

Its deff a square bolt inside.So the only way to get it off is with a spical tool correct?

 

[rick74304]

Do you already have the pedal arm off ? If not, you have to remove the cotter (square bolt) out 1st. To start take off both nuts from each cotter. Then, put both nuts on the cotter you're trying to take off. Dont tighten them all the way down, just enough so you can get both of them on. Tighten them to EACH OTHER. This will help save the threads on the cotter, in case you need to re-use them.Make sure you leave enough room for the cotter to slide loose. Hose the crank arm with lots of wd-40,from all sides, soak awhile, repeat.
Then, take a good hammer, and hit the cotter a couple of good ones. It should pop out slightly. Remove one of the nuts, spin the other one to the tip of the threads, tap it out some more. It should be loose enough now to take the nut all the way off, grab the head with vice grips and remove. If the pedal arm is still stuck, heat it up with a torch slightly, and tag it with the hammer back and forth until the rust bond breaks.
That should do ya.
Rick