TM 9-2320-366-34-1
1-19. M1089 MATERIAL HANDLING CRANE (MHC), 30K WINCHES, AND UNDERLIFT
(CONT)
a. Material Handling Crane (MHC). The M1089 MHC has a lifting capacity of 11,000 lbs (4,994 kgs). The MHC
contains an overload shutdown system which monitors boom angle, boom extension, and load weight. If the overload
shutdown system senses an overload condition, certain MHC functions become locked out. The vehicle is stabilized
during MHC operation by jack cylinders (4) attached to outrigger beams. Outrigger pads (5) are provided and are
attached to the bottom of the jack cylinders by quick release pins. All MHC functions are hydraulically controlled by
levers at the control station (6). All exposed hydraulic cylinder rods are hard chrome plated to resist corrosion and
wear.
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