the load engaging portion 80 into contact with the load 84 once the load 84 has been placed adjacent to the load engaging portion 80 the tower 10 would be secured by support pins 64 a 64 d and 68 a 68 d as substantially described above the secondary hydraulic unit could then be used to perform the function of displacing the load 84 in addition the secondary hydraulic unit could be used in addition to or instead of the outriggers 22 a 22 d to raise the wheels 16 a 16 d off of the ground so that the ground engaging portion 20 is placed in contact with the ground and or dunnage 48 where the secondary hydraulic unit is comprised of more than one hydraulic cylinder the separate cylinders could be operated independently to assist in leveling the tower 10 in an alternate embodiment the tower 10 could be operated entirely via hydraulic means the wheels 16 a 16 d outriggers 22 a 22 d outrigger pins 24 a 24 d and support pins 64 a 64 d and 68 a 68 d for example could be adjusted positioned engaged and or disengaged via hydraulic control means referring to the flowchart 800 of fig8 an exemplary method of operating tower 10.