Remove the futon pad and set it aside in a clean, dry location. Set the back deck in the flat position. Remove plastic runners that fit into the grooves in the arms of the futon. Unscrew the bolts that attach the back deck to the seat deck of the futon. Slowly slide the back deck off and set it aside. Place bolts and plastic runners in a plastic bag or container for safekeeping.
Unscrew the seat deck from the frame and arms. Set the seat deck aside with the back deck. Unscrew the arms from the back and front stretcher rails.
Remove the side rails from the seat deck, if desired, or leave them in place. The goal is to break the futon down into pieces that you can stack for easy moving.