TM 5-3895-346-14
STARTING MOTOR
ENGINE OVERHAUL
to threaded holes in the lever housing. The nose housing is held to the lever housing by internal attaching bolts
extending from the lever housing to threaded holes in the nose housing (Fig. 2). With this arrangement, it is
necessary to partially disassemble the motor to provide access to the nose housing attaching bolts. Relocate
the nose housing as follows:
1.
Remove the electrical connector and the screws attaching the solenoid assembly to the field frame.
Then remove the bolts from the commutator end frame.
2.
Separate the field frame from the remaining assembly and pull the armature away from the lever
housing until the pinion stop rests against the clutch pinion. This will provide access to the nose-housing
attaching bolts.
3.
Remove the nose-housing attaching bolts with a box wrench or open-end wrench.
4.
Turn the nose housing to the required position.
CAUTION
The solenoid must never be located below the centerline of the starter or dust, oil,
moisture, and foreign material can collect and cause solenoid failures.
5.
Reinstall the nose-housing attaching bolts and tighten them to 11-15 lb ft torque.
6.
Reassemble the motor.
Lubrication
The starting motor bearings (bushings) are lubricated by oil-saturated wicks which project through each bronze
bushing (one at each end and one at the center) and contact the armature shaft.
Oil can be added to each wick by removing a pipe plug which is accessible on the outside of the motor (refer to
Lubrication and Preventive Maintenance).
Flywheel Ring Gears
The starting motor drive pinion and the engine flywheel ring gear must be matched to provide positive
engagement and to avoid clashing of the gear teeth.
Flywheel ring gear teeth have either no chamfer or a
Bendix chamfer. The Sprag clutch cannot be used with a ring gear with a Dyer chamfer.
Remove Starting Motor
Failure of the starting motor to crank the engine at normal cranking speed may be due to a defective battery,
worn battery cables, poor connections in the cranking circuit, defective engine starting switch, low temperature,
condition of the engine, or a defective starting motor.
If the engine, battery, and cranking circuit are in good condition, remove the starting motor as follows:
1.
Remove the ground strap or cable from the battery or the cable from the starting-motor solenoid.
Tape the end of the cable to prevent discharging the battery from a direct short.
2.
Disconnect the starting-motor cables and solenoid wiring.
CAUTION
Tag each lead to ensure correct connections when the starting motor is reinstalled.
3.
Support the motor and remove the three bolts and lockwashers which secure it to the flywheel
housing. Then pull the motor forward to remove it from the flywheel housing.
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