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 TM 10-3930-638-24&P
3-13. STARTER AND SOLENOID REPAIR (cont)
REMARKS
ACTION
ITEM
STEP
LOCATION
TESTING (cont)
Rotate armature slowly one or more revo-
lutions. If the armature is shorted, the
steel blade will vibrate. Turn power
off .
Position armature in growler, as shown.
Turn power on
Follow directions supplied with growler
Test commutator
c. Armature (10)
and test commutator bars for abnormal
bars
readings. Abnormal readings will indi-
cate a short, open or poor connection.
If testing indicates commutator is
grounded, the armature is shorted or
commutator readings indicate a short,
or an open or poor connection, replace
armature
Disconnect field coil ground connection.
Test
Field coil assembly
17
Use test lamp. Connect one test probe
(52)
of the test lamp to the connector (2)
and the other probe to the frame (7).
If the test lamp lights, the field coils
(52) are grounded. If coils are grounded,
remove and replace coils. Touch test
probes to each end of the field coil
windings. If the test lamp does not
light, the field coils are open. If coils
are open, replace coil assembly (52)
REASSEMBLY
If removed
Assemble and
Field frame
a. Field coil assembly
18
position
(7)
(52)
Position
b. Four pole shoes
(51)
Install
c. Eight screws (50)
If removed
Install
d. Grommet (49)
3-109
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