In this video I tackle the seized cotter pins that were stopping me progressing with one of my bikes.

My usual method for cotter pin removal:
Clamp bike securely in a maintenance stand
Fit a piece of wood (with a hole for the cotter pin to fit in) securely under the crank arm.
Loosen nut slightly
Use a large hammer and heavy chisel / punch to knock the pin out.

Unfortunately that didn't work this time and the pin decided to bend. Once it does bend it is very hard to get out with force alone. The best was I've found to tackle them is to drill them out. Good quality bits are a must.

Music by: http://freemusicarchive.org/music/Box...