TM 5-3810-300-24 & P2
12.
Hourmeter. Provides a digital readout of engine operating hours. Controlled by a pressure switch in the engine
oil system.
13.
Ignition On Indicator Light. Indicates that the ignition switch is positioned to ON or ACC.
14.
Push-Pull Parking Brake Control. Pulling control button out releases air in the spring loaded automatic brake
units on the rear tandem axles. Pushing button in compresses the springs, releasing the brakes. Do NOT use to
stop vehicle except in an emergency as a severe sudden stop will occur.
15.
Defroster Push-Pull Control. Pulling the control allows air from the heater to flow to the windshield for defrost.
Pushing the control allows air to flow out of the heater vents into the cab.
16.
Cab Heater Fan Control. Variable speed control adjusts air output as desired.
17.
Heat Push-Pull Control. Pulling the control opens a valve in the heater inlet water line to control the temperature
of the air.
18.
Windshield Wiper Switch. This switch has three positions OFF LOW HIGH with built-in circuit breaker.
Parking Brake Warning Light. (Not Shown). When RED, indicates parking brake is "on".
19.
Engine Emergency Stop Control. Used only when engine does not stop with normal ENGINE STOP CONTROL.
This control shuts off the air supply at the engine air box for positive stop. The valve must be manually reset at
the air box.
20.
Engine Stop Button. Depressing button energizes a solenoid valve which places the injector racks in the "no
fuel" position.
21.
Ignition Switch. Provides for controlling electrical power to the Carrier and for starting the engine.
22.
Lights Switch. Three position switch controls parking-marker lights, head-tail lights, and indirect instrument panel
lights.
23.
Hydraulic Pump Indicator Light. Indicates if the hydraulic pumps constant speed drive is engaged or disengaged.
24.
Roadranger Gear Shift Lever. Shift pattern shown on decal.
Gear Range Selector Valve. (Not Shown). Range positions shown on shift lever knob and decal.
Countershaft Brake Control Button.
(Not Shown).
Used only to assist initial engagement when vehicle is
standing still.
25.
Accelerator Pedal. Controls engine speed by mechanical linkage to the governor control shaft. Depress to
increase engine speed.
4-6
