Anyone know how to weld?

[teko.livejournal.com]

One of my housemates has a very unusual repair project that he's stymied on: an old arcade game that you play by pedaling an exercise-bike-type thing. One of the pedals is loose, making the game unplayable. A previous owner seems to have tried to 'weld' it in place with JB Weld, but that didn't work. A bike repairperson friend tells me that the crank arm is broken and that I need a used crank arm and cotter to fix it. The other option is to weld the sucker into place, which may hold, I'm not sure.



Not having repaired a bike before, I'm seeing if anyone here can either help or just weld.... or knows anyone who can. I can't exactly move the game, so they'd have to come over to help.