TM 9-2320-392-10-1
M1083A1 SERIES THEORY OF OPERATION - Continued 0003 00
M1089A1 MATERIAL HANDLING CRANE (MHC), 30K WINCHES, AND UNDERLIFT
ASSEMBLY
M1089A1 Material Handling Crane (MHC). The MHC is mounted on the frame near
the middle of the vehicle. The MHC has a lifting capacity of 10,000 lbs (4,540 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; hoist up,
boom telescope out, and boom up functions become locked out.
The vehicle is stabilized during MHC operation by outrigger jack cylinders attached to
outrigger beams. Outrigger pads are provided and are attached to the bottom of the
outrigger jack cylinders by quick release pins. All MHC functions are controlled by levers
at the control panel.
0003 00-44
