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SYSTEM
A
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.
TM 9-2815-221

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