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TRUCK SERVICE MANUAL
TM 5-4210-230-14&P-1
ELECTRICAL
Fig. 1 Sectional View of Enclosed Shift Lever Type Starting Motor
DESCRIPTION
The enclosed shift lever type starting motor is equipped
with a drive end housing which encloses the entire shifting
mechanism and solenoid plunger, protecting them from road
dirt, splash and icing conditions.
The solenoid is mounted on the flange of the drive end
housing and operates the overrunning clutch drive by means
of a linkage and shift lever. When the control switch closes
the starting circuit the solenoid is energized shifting the pinion
into mesh with the ring gear on the engine flywheel and
closing the main contacts inside the solenoid. When the
contacts inside the solenoid close, battery current is then
supplied to the motor causing the armature to rotate. Torque
is then transmitted by the clutch from the starting motor
armature to the flywheel. To protect the armature from
excessive speeds when the engine starts the clutch is
designed to "overrun" or
turn faster than the armature which permits the pinion to
disengage itself.
LUBRICATION
Some starting motors require no lubrication except at
overhaul, while other motors are equipped with lubrication
fittings. The motor should be lubricated every 8000 km (5000
miles) or 300 hours of operation if a means of lubrication is
provided.
1.
Hinge cap oilers or oil tubes sealed with pipe plugs
should have 8 to 10 drops of medium grade engine oil.
2.
Grease cups should be turned down one turn or refilled
if necessary.
If the motor is disassembled for any reason lubricate as
follows:
1.
Oil wicks should be resaturated if equipped.
CTS-2258N Page 3
PRINTED IN UNITED STATES OF AMERICA
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