Carl, I too have a 4100. As was mentioned in another post, you can leave the mower deck attached and locked in the upper position, but if the snow is any deeper than 12" you will have problems with it packing under your deck and dragging. Removing the deck is really fast and easy. Do this on a hard level surface like concrete. Turn your front wheels all the way to the right (if I remember correctly, but maybe could be left). Turn the guide wheels so they face side to side instead of front to back. Lower the deck all the way to the ground. Shut off the machine. Disconnect pto shaft from tractor, pull j-pins from rockshaft, and release and remove front latch mechanism. Then roll the deck out from under the tractor. It takes me 5-10 minutes to do this. You'll be glad you removed it, since you don't have to worry about hanging up on the deck or damaging it. Reinstalling the deck is the same process in reverse. The only real trick is discovering how the pto shaft snaps onto the tractor. It's a ring that is a push-pull and twist type of setup. Hard to describe, but very easy to do once you figure it out.