TM 5-3810-307-10
AIR PRESSURE Gauge (20). The gauge located on the upper left side of the front console
panel. The gauge is a direct reading, dual pressure gauge. A red needle indicates primary
air pressure in supply reservoir, and a green needle indicates secondary air pressure in
secondary reservoir and auxiliary reservoir. The gauge has a dual scale calibrated from 10
to 150 psi and 100 to 1,000 kPa. Tubing connects the gauge to the air system.
Hydraulic PUMP ENGAGED Indicator (21). The indicator is located at the upper left of the
front console panel. The red indicator is lit when the hydraulic pump is engaged.
DIFFerential LOCKED Indicator (22). The indicator is located on the upper left side of the
front console panel. The red indicator is lit when the differential lock control switch is in the
FRONT & REAR LOCKED position and the front and rear differentials are locked and when
the switch is in the REAR LOCKED position indicating the rear differential is locked.
Low AIR PRESSure Indicator (23). The indicator is located at the upper left side of the
front console panel. The red light is lit when the pressure in the air system(s) is below 75
psi (517 kPa). The indicator is controlled by two pressure switches electrically connected in
parallel. The pressure switches also energize an alarm buzzer.
CARRIER STEERing DISENGAGED Indicator (24). The indicator is located at the middle
of the upper left side of the front console panel. The indicator is lit when the steering mode
selector handle (mounted by the hydraulic reservoir) is pulled out allowing steering from
superstructure.
STEER PUMP FAILED Indicator (25). The indicator is located at the upper middle of the
front console panel. The indicator lights when the pressure drops in the steering circuit
indicating a failure in the steering system.
FUEL PREHEAT Indicator (26). The indicator is located at the upper middle of the front
console panel. The indicator is lit when a thermostat turns on the diesel fuel heater.
Low ENGINE OIL PRESSure Indicator (27). The indicator is located on the upper middle
of the front console panel. The indicator is illuminated by a red light when engine oil
pressure is too low. In addition to the indicator, the switches also energize an alarm buzzer.
console panel. The tachometer registers engine RPM and is calibrated in RPM x 100 with a
range of 0 to 40. It receives a signal from a sending unit on the engine.
(28) and registers total hours of engine operation.
panel, above the Engine DIFFERENTIAL LOCK Switch (31) and left of the steering column.
With the IGNITION Switch (50) in the ON position and before starting the engine, the
voltmeter indicates the condition of the batteries. With the engine running, the voltmeter
indicates output voltage of the alternator. The voltmeter indicates voltage on a scale from
20 to 32 volts.
NOTE
The differential lock can only be engaged when 4WD
is active.
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