STARTING SYSTEM

SYSTEM

generator functions as the starter motor.

When the preheat switch actuated, 24 volts

is applied to the

generator field coil from the preheat relay. When the start

24 volts

is applied to the generator armature from the

starting relay. This motorizes the generator. The generator is coupl-

ed to the engine by a drive chain. When the engine starts, the cur-

rent in the armature reverses direction, and the motorized

generator resumes normal generator operation. After the engine

starts, the start and preheat switches must be released. This will

prevent loading the engine, since the voltage regulator is bypassed

and

voltage is applied to the field during starting cycle. After

the engine has started, and the preheat and start switches are

released, the generator output is controlled by a solid-state voltage

regulator.

STARTING AIDS

Engine starting is aided by preheater located in the air intake

heater manifold and by glow plugs in the

chamber.

These are activated prior to a cold engine start. The heated air

entering the combustion chamber improves fuel combustion.

1-9

TM 9-2815-221