Yes the carriage has to come out. Put the forks and carriage on top of a pallet. Using a C clamp, tighten one of the forks to the pallet.Pull the cotter pins for the carriage chains, take loose ,lay over the carriage and Raise the mast up to drop carriage out of the bottom and drive lift in reverse to free the carriage.install a 2 foot 4x4 block across the top of mast and 2nd rail. Let the mast down into the blocks of wood. Unbolt the four bolts in the back of rail, I believe it was a 12 point 5/8 socket and remove the snap ring on top. There will be two 5/16 bolts and nuts on the bottom rod mount and of course take the supply hydraulic hose off.