TM-9-2320-430-10

TRUCK, TRACTOR, 8X8, M983

TECHNICAL MANUAL; OPERATOR'S MANUAL

JUNE 2009

TM-9-2320-430-10 - Page 150 of 868

Table 1.

Heater Compartment Controls and Indicators. - Continued

Key

Control/

Indicator

Function

Switch (M1120

only)

AUTO position: For normal loading/unloading operations.

MAN H.A. (Manual Hook Arm): Places the LHS in manual

mode for moving the hook arm when the AUTO mode

electronic circuits fail. Also used during loading/unloading

operations to/from trailer or docks.

MAN M.F. (Manual Main Frame) position: Places the LHS in

manual mode for moving the main frame when the AUTO

mode electronic circuits fail. Also used during loading/

unloading operations to/from trailer or docks.

MAN TRANS (Manual Transit) position: This position must be

selected if vehicle is to travel after the LHS AUTO mode

electronic circuit has failed and the MAN H.A. and/or MAN

M.F. modes have been used.

CRANE/SRW position: Not used on this vehicle.

2

JACOBS ®

ENGINE

BRAKE ON/

OFF Switch

Supplies or shuts off electrical power to JACOBS ® ENGINE

BRAKE.

3

JACOBS ®

ENGINE

BRAKE

Indicator

Illuminates (green) when JACOBS ® ENGINE BRAKE ON-

OFF switch is in ON position.

TM 9-2320-430-10

0021

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