put a pair of 2 x 4's under the deck then lower it onto them this way there is no weight on the fasteners.
Once undone grab one side and slide it out using the 2 x 4's as rails.
Helps if they are fairly long.
OR without the deck you can pick up the front of the mower & poll it back if there are two people
Didn't answer earlier cause I am yet to pull the deck off a Hustler so could not give you a "Pull the pin at X and undo the bolt at Y description "
Just remember after the fasteners are undone move the lift lever to full height so the lift arms, chains, wires , whatever are out of the way.
Installation is the same
If you have some lengths of hollow tube 2" or better use them just so long as what you slide it on is smooth cause the decks ain't light and watch your fingers.