TM-9-2320-428-10

TRUCK, CARGO, 8X8, M977

TECHNICAL MANUAL; OPERATOR'S MANUAL

JUNE 2009

TM-9-2320-428-10 - Page 214 of 1072

OPERATE PERSONNEL HEATER - Continued

AIR

HEAT

DEFROST

LO-OFF-HI

FAN

3

1

4

2

Figure 1.

NOTE

On later model vehicles, the AIR control has a "TURN TO LOCK" function

which holds the vent open at the desired level when the control is rotated

clockwise. Rotate control CCW until it stops to unlock the vent.

3.

Adjust AIR control (3) as desired to control outside airflow for cab ventilation. Unlock,

and push AIR control (3) all the way in to shut outside air ventilation off.

4.

When personnel heater is no longer required:

a.

Push in HEAT control (1) to turn heater off.

b.

Set FAN switch (2) to OFF.

TM 9-2320-428-10

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