adjust carbon pile as required to obtain
(9) If output is within 10 amperes of rated
output, test regulator with an approved
regulator tester, and check field winding.
(10) If output is not within 10 amperes of rated
output, check the field winding, diode trio,
rectifier bridge, and stator as outlined in
Section II. STARTING MOTOR ASSEMBLY
7-3. General. The starting motor assembly converts
electrical energy from the battery into mechanical energy
to crank the engine for starting. A solenoid is mounted
Before disassembly, the starting
on the outside of the frame with the solenoid plunger and
motor assembly should be tested to
pinion shaft mechanism totally enclosed. The drive
determine the extent of disassembly
assembly is an overrunning clutch type which assures
necessary and possible defects to
complete drive engagement before the motor begins to
look for at disassembly.
rotate. When the engine starts, the clutch releases and
allows the pinion to turn faster than the armature shaft
b. Testing Before Disassembly. Check the pinion
until the start switch is released and the return spring
for freedom of operation by turning it on the screw shaft.
action retracts the pinion from the flywheel ring gear.
Check armature for freedom of rotation by prying the
pinion with a screwdriver.
armature shaft, or a loose pole shoe screw will cause the
7-4. Starting Motor Assembly.
armature to bind. If the armature does not turn freely,
a. Removal. Remove the starting motor assembly
the starting motor should be disassembled and
inspected. If the armature does rotate freely, the starting
motor assembly should be given a no-load test before
disassembly as follows:
(1) Make a no-load test setup as shown in
battery and a switch in open position at