Honda FL5540KO Operator's Manual page 16

FL5540 SUB-FRAME and COUNTERWEIGHT INSTALLATION/REMOVAL
6. Stop the tractor when the mast fixing pad
comes even with the floor board of the
tractor.
7. Using two people, lift the sub-frame and
engage the pipe of sub-frame into the
U-shaped channel of the bottom bracket.
NOTE: Use two people to lift sub-frame.