G424 Service Manual Starting System32
STARTING SYSTEM
General Description
The starting motor is used to turn the engine flywheel
fast enough to make the engine run. The starting
motor has a solenoid. When the ignition switch is
activated, voltage from the electrical system will cause
the solenoid to move the pinion toward the flywheel
ring gear of the engine. The electrical contacts in the
solenoid close the circuit between the battery and the
starting motor just before the pinion engages the ring
gear. This causes the starting motor to rotate. This
type of motor "turn on" is a positive shift starting motor.
When the engine begins to run, the overrunning clutch
portion of the pinion drive prevents damage to the
armature caused by excessive speeds. The clutch
does this by breaking the mechanical connection. The
pinion will stay meshed with the ring gear until the
ignition switch is released. A return spring in the
overrunning clutch returns the clutch to its rest
position.
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