Sorry but someone made me go drink beer, but here we go.
1st if you had disk brake, this is going to be fun. I use a piece of oak, 1x1x4, jam it in the chain and break the torque. Before removing the disk I mark the disk with a 1x.25x2ft flat steel bar. Then after I got it out I drilled and tap the disk to re torque the nut, this work great. It you do not have a tine enough wrench you will have to loosen the other motor because its nut will be in your way.
The sprocket, I could not do it myself and if you do not have the same type setup in the MM, you need to take it somewhere to get press off. I was just inspecting mind because I had a ton of trash in the system, I was not replacing. I went to a local John Deere heavy equip shop and they press them off for free. I call the bobcat guys and they never called me back.
I would drain the oil because you have to pull the chain out to remove the rest of the link you cut off; I would not do it while still in the transmission sparks will fly. I put cut link in a vise, and did 3 cuts with a very small cut off wheel and hit it with a punch popped right out.
I would also drain the oil because when you re install the chain, it is going to be a real mess and you need to see when putting the chain on the gear. I had mine on jack and used a piece of garden hose to sophane out the oil, the front lower than the back to get as much as you can. This will be slow.
Where did you get your motors just in case I need them?
