TM 9-2320-392-10-1
M1083A1 SERIES THEORY OF OPERATION - Continued 0003 00
M1089A1 MATERIAL HANDLING CRANE (MHC), 30K WINCHES, AND UNDERLIFT
ASSEMBLY - Continued
power source and supply system. The M1089A1 is provided with a hydraulic tank with a
capacity of 74 gallons (280 L) of fluid. Hydraulic pressure for the MHC is supplied by a
three stage hydraulic pump attached to the rear of the PTO. The hydraulic cylinders on
the MHC contain valves which stop the movement of the cylinder in case of sudden
hydraulic pressure loss. A manually operated back-up hydraulic pump allows you to lower
any load to the ground and stow the MHC if the three stage hydraulic pump fails.
0003 00-47
