Lower the mower deck to its lowest position.
Disengage the cutting blades.
Roll the blade belt off the engine pulley and release the belt from the belt keepers.
Remove the front lift link support retaining pin and washer, and then detach the support from the deck.
Remove the left suspension arm retaining clip and washer. Then detach the arm from the tractor frame.
Remove the left rear deck bracket retaining clip and washer. Then release the bracket from the deck.
Repeat the process on the other side of the deck to disconnect the right suspension arm and right rear deck bracket.
Pull the deck out far enough to access the blade drive belt.
Warning: After you disconnect the rear lift links, the spring-loaded attachment lift lever exerts more tension on the lever so don't use the lever until you reinstall the mower deck.