If memory serves me correctly, there will be a weird looking bolt on the nondrive side crank arm. It will look like an 8mm hex sitting inside a 10mm hex. If that's what you see, just unscrew the 8mm bolt. The other 10mm part is a self extractor. The 8mm bolt will push against the extractor as you unscrew it and force the arm off of the spindle. Expect a little resistance as it comes off. Once the nondrive crank arm is off gently tap on the end of the spindle with the heel of your hand, a block of wood, or a soft faced mallet.