TM-9-2320-273-10
TRUCK, TRACTOR, LINE HAUL; LIGHT EQUIPMENT TRANSPORTER; TRUCK CHASSIS; MEDIUM EQUIPMENT TRANSPORTER
TECHNICAL MANUAL; OPERATOR’S MANUAL
DECEMBER 2012
TM-9-2320-273-10 - Page 114 of 452
Table 12. Lower Control Panel
.
1
2
3
4
5
6
7
ADJUSTMENT
KNOB
CENTER
BUTTON
Figure 12. Lower Control Panel.
Key
Control/Indicator
Function
1.
THROTTLE Control
(M916 through
M920)
This control is used for setting engine speed for operating
the PTO or maintaining fast idle. Press the center of the
button and pull out the control knob until desired engine
speed set. Release the center button. For fine tuning, turn
adjustment knob. Press button and push in control to
return engine to idle.
2.
HEAT Control
This knob opens and closes a valve that controls the
amount of engine coolant flowing through the heater core.
To increase the heater temperature, pull the HEAT
control knob out, and to decrease the temperature, push
knob in.
3.
FAN Switch
The heater fan has three speeds controlled by a 4-position
rotary switch. Turn the FAN switch knob clockwise to
LOW, MED, or HIGH positions to operate the fan. Turn
knob counterclockwise to OFF position to stop fan motor.
4.
DRIVER Control
This knob operates the air vents for the driver side of
cab. Pull DRIVER control knob out to divert air to the
driver side; push in knob to close air vents.
5.
PASSENGER
Control
This knob operates the heater air vents for the passenger
side of cab. Pull PASSENGER control knob out to divert
air to passenger side; push in knob to close air vents.
6.
FRESH VENT
Control
This knob controls the fresh air vent. Pull FRESH VENT
control knob out to send fresh air to passenger side; push
in knob to close fresh air vent.
7.
RECIR VENT
Control
This knob controls the recirculation vent. Pull RECIR
VENT control knob out to recirculate cab air through the
heater; push in knob to close vent.
TM 9-2320-273-10
0005
0005-16
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