How do you replace belts on a sears LT 1036 model 917255270?

well you have to take mower deck off get under it (do not have tractor running its instant suicide also have it an all 4 tires not jackign it up or puting it on blocks) now that your under it grab old belt by a pully give it a pull toward the ground as you make it go around the pully and trust me you'll fit under there cause i did