LOCATION AND DESCRIPTION OF MAJOR COMPONENTS

TM 9-2350-238-20-1

1-9. LOCATION AND DESCRIPTION OF MAJOR COMPONENTS (CONT).

Generator. The 300-ampere, 24-volt dc generator operates whenever the engine is running.

It provides electrical power to recharge the batteries and operate the vehicle.

b. Batteries. Four 12-volt batteries are connected in series-parallel to produce 24 volts, and to

provide electrical power to start and operate the vehicle.

Master relay. The batteries transmit power through contacts in the master relay. When the

master switch is on, the master relay is energized and power is available to all circuits in the vehicle.

Voltage regulator. The voltage regulator controls the output voltage and current of the

generator. It is a solid state unit and is not adjustable. Circuit breakers protect the generator from

electrical overload.

Starter and solenoid. The starter is a direct cranking, nonreversible, 24-volt unit. It is

actuated by a two-coil starter motor solenoid mounted on the starter.

Neutral position switch and starter control relay. The neutral position switch closes when the

transmission shift lever is in neutral position. This completes the circuit for the starter control relay to

supply battery power to the two starter windings when the start switch is pressed.

Driver's instrument and switch panel. The instrument and switch panels contain the

switches, indicator lights, and gages required for operation of the vehicle. Refer to TM 9-2350-238-

10 for description of the separate items on each panel.

Vehicle lighting. The service and infrared headlights are set for high or low beam by the

dimmer switch. The two headlights are combination units. Each headlight consists of an incandes-

cent driving lamp, infrared driving lamp, blackout driving lamp, and blackout marker lamp. The

taillights are combination units. The right taillight consists of a blackout stoplight and marker light.

The left taillight consists of a service taillight, service stoplight, and blackout marker light. The dome

light is a standard combination blackout and service light.

Warning switches and transmitters. When the brake foot pedal is depressed, the brake

warning sensitive switch roller guide is released, causing the switch contacts to close. Closing the

switch contacts causes the service stoplight or blackout stoplight to light.

(1) The engine low oil pressure warning switch opens at 9 to 13 psi (62 to 90 kPa) on increas-

ing pressure. When the switch is closed, a circuit is completed to light the warning light and cause

the warning horn to sound.

(2) The engine oil pressure transmitter is a variable resistance unit. It gives a reading on the

engine oil pressure indicator.

(3) The engine oil temperature warning switch closes at 300 F to 310 F (149 C to 155 C)

on increasing temperature. When the switch is closed, a circuit is completed that causes the

warning light to light and the warning horn to sound.

(4) The transmission oil temperature transmitter is a variable resistance unit. It gives a reading

on the transmission oil temperature indicator.

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