(b) Examine clutch for broken or
starting motor armature to the engine flywheel
cracked teeth.
ring gear.
(c) Examine field coils for worn,
burned, and frayed insulation. Be certain con-
6-4. Starter
nections between field coils are secure. Repair
a. Removal and Disassembly.
connections if necessary.
(1) Removal. Refer to paragraph 3-57
(d) Inspect springs for distortion or
and remove the starter.
fatigue. Examine brushes for damage or ex-
cessive wear.
(2) Disassembly.
(3) Repair.
lockwashers (15), attaching solenoid switch
(a) Replace armature or coils if tests
(16) to housing (12). Remove solenoid and
indicate shorts.
spring (17).
(b) If commutator is out-of-round in
(b) Unscrew and remove two bolts (3),
excess of 0.001 inch turn down on lathe.
screws (21), and washers (22). Remove drive
(c) Replace damaged or worn solenoid
housing (23), bushing (24), ring (10), and
switch.
pinion stop (11).
(d) Replace all parts indicating wear,
(c) Remove snap ring (18) and shift
cracks, or damage.
lever stud (18).
(e) Undercut mica insulation between
(d) Remove shift lever housing (12).
the commutator bars to a depth of 1/32 of an
Pull pin (18) and release plunger assembly
inch. When undercutting mica, the cut should
(20) from lever assembly (19). Remove clutch
be square and free of burrs.
(9).
(4) Testing.
(e) Remove frame (6) and brake
(a) Check brushholder for shorts to
washer (7). Pull armature assembly (8) from
ground using a test light.
within coil assembly.
(b) Test armature assembly for open
(f) Remove brushes (30), brush spring
coils and shorts to ground, or between coils
and brushholder.
by using a test light.
(g) Do not remove pole shoes (26),
(c) Check field coils for open circuits
field coils, or coil assembly unless replacement
and shorts to ground, or between coils using a
parts are needed.
test light.
b. Cleaning, Inspection, Repair and Testing.
c. No-Load Test.
(1) Cleaning.
(1) Connect the starting motor to a 24
(a) Use a cloth dampened with an ap-
proved solvent to wipe all dust, oil, and other
connected in the circuit, apply voltage to the
foreign material from the brush plates, end
starting motor.
frames, and armature and field assemblies.
(2) With the starting motor armature
(b) Use filtered compressed air to blow
turning approximately 6,000 rpm, the ammeter
dust and dirt from the crevices of the armature
should indicate 42 amperes. The voltmeter
and field windings.
should be indicating 23 volts.
(c) Secure armature in a lathe with
Note. The performance of the starter should
armature spinning, hold a sheet of No, 000
conform to the curves indicated in MS 53013.
sandpaper against the commutator until the
d. Reassembly and Installation.
copper is bright and smooth.
(1) Reassembly is the reverse of dis-
(2) Inspection.
assembly, refer to figure 6-2.
(a) Examine field frame assembly for
cracks or warping. Inspect armature shaft
(2) Installation of the starter assembly
end for damage or wear.
is the reverse of removal (para 3-57).
