Cub Cadet 8454, Service Manual

Page: 309 / 334

ELECTRICAL SYSTEM
8-11
D569-W02 May-2003
(C) When key switch is on:
When the key switch is turned on, a current flows from
the battery through the pull-in coil in the magnet switch
section to the holding coil, energizing the plunger to pull
it in.
At this time, the pinion moves by the lever to en-
gage with the ring gear.
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(1) Battery (5) Spline tube
(2) Starter switch (6) Pinion
(3) Ground (7) Ring gear
(4) Return spring (8) Operated by lever
(D) When contact plate is closed:
When the contact plate is closed, a large current flows
through the motor section to generate a large mechani-
cal power which turns the engine crankshaft. At this time,
the pinion is moved forward by the screw spline for more
contact. Since the pull-in coil ends are short-circuited by
the contact plate, the plunger is held only by force of
the holding coil.
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(E) When key switch is release:
When the key switch is release, a current flows instan-
taneously through the pull-in coil in the opposite direc-
tion as shown in flg. Therefore, the forces of the holding
coil and pull- in coil are balanced. As a result, the
plunger is returned by the return spring. Simultaneously,
the pinion is disengaged from the ring gear, the contact
plate is disconnected, and the starter is promptly
stopped by the armature brake.
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