P-8-627-34
T.O. 35C2-3-442-2
TM 5-6115-457-34
TM-07464A-35
4. Measure distance between outside
d. STALL TORQUE TEST.
edge of drive sleeve and thrust washer as
1. Make stall torque test setup as
shown in view B. This distance should be
shown in view C.
0.020 to 0.050 inches. If measurement is
2. The solenoid winding shall be
not correct, remove plug and washer from
activated with a separate battery.
shift linkage cover and adjust nut as re-
3. Stall torque test values should
quired to obtain proper measurement. Dis-
be 4.9 volts, 400 amperes (maximum), and
connect battery.
22.0 foot pounds (minimum). Adjust variable
resistance to obtain 4.9 volts at 400 amperes,
5, Make test setup as shown in view
4. If stall torque values are too
C. Leave switch open.
low, check armature, brush spring tension,
6. Place suitable interference block
contact area, and switch contacts. If these
with 0.983 inch side against drive gear as
components are not at fault, replace entire
shown in view D.
starting motor.
CAUTION
e. ARMATURE END PLAY ADJUST-
Because of high amount of current
MENT. Adjust end play to 0.005 to 0.030
being passed through solenoid wind-
inches by adding or removing thrust wash-
ing, these tests should be made as
ers on commutator end of armature shaft.
brief as possible.
f. PINION POSITION ADJUSTMENT
(See figure 8-9). This adjustment assures
7. Close switch in battery circuit.
correct relation beween solenoid and in-
The 12-volt lamp should not light. Be sure
dexing drive assembly. If adjustment is
interference block is against drive gear
not correct, damage may result to drive
and not against drive sleeve. If lamp does
gear and/or flywheel ring gear.
not light, proceed to step 8. If lamp lights,
solenoid is defective. Replace solenoid,
WARNING
then repeat test.
When connecting lead-acid batteries
8. If test lamp does not light, open
connect positive terminal first.
switch and connect a carbon pile and volt-
meter into test circuit as shown in view E.
1. Connect a 12-volt battery as
9. Place suitable interference block
shown in view A.
with 1/2-inch side against drive gear,
2. Momentarily touch the jumper
Close switch and be sure interference block
lead between terminal stud of solenoid and
is against drive gear and not against drive
terminal stud in commutator and head.
sleeve.
This will shift solenoid and drive solenoid
1 0 . Adjust carbon pile and observe
and drive assembly into cranking position
v o l t m e t e r . The test lamp must light before
until battery is disconnected,
the voltmeter reads 16 volts. If lamp does
3. Push drive assembly toward
not light, adjust nut view B until proper
commutator end of motor to eliminate any
setting is obtained.
Slack movement in linkage.
11. Reinstall plug and washer in
shift linkage cover.
WARNING
8-29.
INSTALLATION.
When disconnecting batteries (lead-
acid) disconnect negative terminal
Refer to Operator and Organizational
first.
Maintenance Manual and install starting
motor.
8-20
Change 8
