TM 9-2320-392-10-1
M1083A1 SERIES THEORY OF OPERATION - Continued 0003 00
M1084A1/M1086A1 Material Handling Crane (MHC). The MHC is mounted on the
frame at the rear of the vehicle. The MHC has a lifting capacity of 5,000 lbs (2,270 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. Proximity
sensors are attached to the outrigger jack cylinders to prevent operation of the MHC
unless the outrigger jack cylinders are extended to the ground. 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 00-41
