You do not need to remove the handwheel on a Turncrafter to remove the belt.
1. Loosen and raise the motor to reduce belt tension.
2. Open the lower headstock door to get access to the bottom pulley.
3. Loosen the nut on the upper shroud a bit (don't take the knob all the way off - if you do, you can lose it in the shavings that live under your lathe - DAMHIKT) - and then just lift the shroud up to access the upper pulley.
At this point, you can take the belt off the pulleys, but it will still be around the shaft and captured behind the interference plate that closes the opening in the upper shroud. You can easily pull it over the handwheel, but to remove it completely, you must remove the plate. To do that, continue to unscrew the nut on the shroud completely - just be careful to catch it before it falls into the shavings. The plate can then be removed, and the belt can be extracted around the handwheel. Repeat the process to replace the belt.