TM 10-3930-669-20 All functions of the mast assembly (1) and the pivot/shift assembly (2) are controlled by two joysticks (3) mounted in the cab.  Joysticks (3) are connected by cables (4) to the stack valves (5) which direct flow to and from the mast assembly (1) and pivot/shift assembly (2).  Hydraulic oil pressure is provided by a transmission-mounted pump which is shared by the steering system, mast assembly, and pivot/shift assembly. 1-21