I was wonder if I need to remove a part to replace the belt on my Murray Lawn Tractor. The model number is 42515X92B or the part number is 37X88.

Thanks for help in advance

That tractor has 3 belts, which are you replacing?

I have a murray select 42514x8a lawn tractor that was working fine.I only use it in the fall to clean up leaves. When I went to use it,it needed a key switch and to replace a bad rear tire,after I put the tire back on it won't go into gear.

It won't go into gear or won't move ?
Check the wheel you removed and check and see if you lost the axle key.
Luck

It was the axel key I just ordered 1. Thanks for the help! :~)