the light duty carriage 59 is tiltable about a horizontal axis 62 fig1 by means of tilt cylinders 64 each fork can be moved left or right independently of the other fork by means of double cylinders 75 and 76 fig7 and 12a and 12b hydraulic fluid from a source 79a through lines 79 causes pistons 110 111 to move in the respective cylinders to thrust a fork 72 away from the housing 61 fluid in the opposition direction will cause the fork to reverse its position thus the forks on the carriage are able to accommodate themselves as in fine tuning to the pallets and the position of them in the container for example if a pallet is against a wall of a container the forks can be moved totally to one side of the carriage in order to properly engage the pallet to lift it out of the container it is contemplated that the light duty carriage 59 will be deployed with the inner boom extended far into the interior of a container 18 20 feet where heavy duty lifting is required a heavy duty carriage 80 must be mounted on the boom 25 the heavy duty carriage 80 is depicted in fig8 by reference to fig9 a and 9b 10.