TM 5-3820-256-10
CONTROL or
KEY
INDICATOR
FUNCTION
11
Parking brake indicator
Illuminates when parking brake is set.
12
Fuel gage
Indicates level of fuel in engine fuel tanks.
13
Air pressure gage
Indicates pressure in truck air system.
14
Air pressure gage
Indicates pressure in truck air system.
15
Starting switch
Key switch to energize truck electrical system
and start engine. NOTE: Engine stop switch
(5, Figure 2-11) must be out before engine
will start.
16
Back-up alarm shut-off
Shuts off backup alarm. Up is ON; down is
switch
OFF.
17
Speedometer/odometer
Indicates vehicle speed in miles-per-hour (mph)
and cumulative total of miles driven.
18
Tachometer
Indicates engine speed in revolutions per min-
ute (rpm) .
19
Ether start switch
Injects ether into engine intake to aid in cold
weather engine starts.
20
Lighting control unit
Controls vehicle lighting for regular service and
blackout lighting operations.
21
Transmission shift lever
Selects transmission gear range. Shift pattern
is indicated on knob.
22
Park brake
Pull to apply vehicle parking brake.
23
Heater/defroster fan
Three position knob controls heater/defroster
control
fan. Rotate knob CW from off to low and
high speed.
24
Heat control
Pull knob out for heat.
25
Defrost control
Pull knob out for defrost.
26
Front axle lever
Select ENG to engage front axle drive; select
DIS to disengage -front axle drive.
27
Front axle indicator
Illuminates when front axle drive is engaqed.
28
Transfer case lever
Select DIR (direct) for high speed; select UND
(underdrive) for low speed.
29
PTO lever
Controls engine power take-off. Move to ENG
to engage; to DIS to disengage PTO.
30
PTO indicator
Illuminates when PTO is engaqed.
31
Power divider lock
Illuminates when Power Divider lever (32) is
indicator
at IN position.
32
Power divider lock-out
Locks out inter-axle differential for maximum
lever
pulling power in slippery or poor road condi-
tions. IN for additional traction; OUT for
normal driving.
WARNING
Engage power divider lock-out (32) at slow speeds or when stopped and never when wheels
are spinning. Do not operate the axles on dry pavement with the lock-out engaged for
prolonged duration.
2-13
