Originally Posted by HillRider

If the crank is a 6500, it has autoextracting crank bolts and no special tool besides an 8 mm hex key is needed. You just loosen the crank bolt a turn or two and it will then get "tight' again. Keep turning the wrench and the crank arm will pop off.

If the crank is a 5500, you will have to remove the fixing bolts with an 8 mm hex first. Then you will need a crank puller with a wide screw press end to span the hollow spindle (Park CCP-44) or a standard square taper puller with a plug to fill the spindle's center hole like Shimano's TL-FC15. Be sure to remove the washers behind the crank bolts before using any puller.

Once the crank arms are off you will need a Park BB-22 or similar to remove the Octalink bottom bracket on your bike, no matter if it's a 6500 or 5500. Remember the drive-side cartridge is left-hand threaded and removes clockwise.