TM-9-2320-338-10
TRUCK, CARGO, 8X8, M977A4
TECHNICAL MANUAL; OPERATOR'S MANUAL
OCTOBER 2008
TM-9-2320-338-10 - Page 1011 of 1120
OPERATOR MAINTENANCE
CLOSE/OPEN HEATER VALVES
INITIAL SETUP:
Equipment Condition
Engine OFF. (WP 0057)
Wheels chocked. (WP 0072)
Open passenger side engine cover.
(WP 0157)
CLOSE HEATER VALVES
NOTE
•
Closing two heater valves will improve the efficiency of the cabin air
conditioning.
•
Closing two heater valves will disable cabin heat.
•
Heater valve knob is located on rear passenger side of engine.
1.
Turn heater valve knob (1) counterclockwise to close.
1
Figure 1.
NOTE
Heater valve knob is located towards bottom of front passenger side of
engine.
TM 9-2320-338-10
0149
0149-1
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