Description

CIRCUIT OPERATION
When the Ignition Switch is moved to the START position, battery voltage is applied to the Starter Solenoid Assembly. Both solenoid windings are energized. The circuit through the Pull-In Winding is completed to ground through the Starter Motor. The winding work together magnetically to pull in and hold in the Plunger. The Plunger moves the Shift Lever. This action causes the Drive Assembly to rotate as it engages the Flywheel ring gear on the Engine. At the same time, the Plunger also closes the motor contacts in the Starter Solenoid Assembly. Full battery voltage is then applied directly to the Starter Motor and it cranks the Engine.

As soon as the motor contacts close, voltage is no longer applied through the Pull-In Winding, since battery boltage is applied to both ends of the windings. The Hold-In Winding remains energized and its magnetic field is strong enough to hold the Plunger, Shift Lever, and motor contacts in place to continue cranking the Engine.

When the Ignition Switch is released from the START position, battery voltage is removed from the PPL wire and the junction of the two windings. For an instant before the motor contacts open, current flows through the Pull-In Winding in the reverse direction and through the Hold-In Winding in the normal direction. The magnetic fields of the Pull-In and Hold-In Windings now oppose one another. The Return Spring then causes the Drive Assembly to disengage and motor contacts to open simultaneously. As soon as the contacts open, the Starter circuit is turned off.