It might be a little tight if new. Best to lay on your back so you can see the drive shaft. Then pull back on the collar toward the front of the tractor. The drive shaft should disengage from the splined shaft. When putting it back on, set the PTO lever in the rear position so the center PTO drive is not engaged. This will help to get it back on the tractor. Also some spray lube will also help. If it separates from the MMM, there is a specific way that it has to be put back together. If you look at it closely, you will see that there is a weld dot at the end, so it will only go back together one way. This is to keep the U joints properly phased.. Junk..