TM-9-2320-428-10
TRUCK, CARGO, 8X8, M977
TECHNICAL MANUAL; OPERATOR'S MANUAL
JUNE 2009
TM-9-2320-428-10 - Page 349 of 1072
OPERATE GPFU - Continued
Figure 5.
NOTE
•
There are two M-3 heaters. Both are the same.
•
Heater indicator light will go off and on during normal heater
operation.
8.
If air is too cold to breathe comfortably, turn knob (9) clockwise until heater indicator
(10) lights. To adjust temperature:
Figure 6.
a.
Turn knob (9) clockwise for warmer air.
b.
Turn knob (9) counterclockwise for cooler air.
TM 9-2320-428-10
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0059-5
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