TM-9-2320-428-10
TRUCK, CARGO, 8X8, M977
TECHNICAL MANUAL; OPERATOR'S MANUAL
JUNE 2009
TM-9-2320-428-10 - Page 156 of 1072
Table 1.
Tunnel panel controls and indicators. - Continued
Key
Control/
Indicator
Function
Indicator
(M1977 only)
7
OVERLOAD
Indicator
(M1977 only)
Illuminates whenever main hydraulic relief valve is opened
during loading or unloading. Indicates LHS has reached an
overload condition or that hydraulic system is lifting very near
maximum capacity. If the LHS is overloaded, the light
illuminates and the LHS is automatically locked out.
8
OIL TEMP
Indicator
(M1977 only)
Illuminates when LHS oil temperature exceeds limits.
9
LHS MODE
Select Switch
(M1977 only)
OFF - The LHS is not operational. This setting is used for
transport.
AUTO - Provides automatic operation of the LHS during
NATO flatrack retrieval.
MAN HOOK ARM - Places the LHS in manual mode for
moving the hook arm when the AUTO mode electric circuit is
malfunctioning.
MAN MAIN FRAME - Places the LHS in manual mode for
moving the main frame when the AUTO mode electric circuit
is malfunctioning.
REMOTE CONTROL - Energizes the LHS remote-control
unit.
TM 9-2320-428-10
0020
0020-4
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