(d) Replace armature if a short is indicated.
(1) Assemble starter and solenoid in reverse order of
(10) Turn down armature if scored or out of round.
disassembly procedures using new gaskets and o-rings. In-
Under cut mica to a depth of 0.025 to 0.032 inch below
spect all insulating washers and bushings. Replace if de-
surface of commutator. Use care to avoid widening commu-
(2) If brushes were replaced, run in new brushes as fol-
Check diameter of commutator after re-
(a) Cover armature commutator with a piece of
moving material. Diameter shall not be
No. 00 grit sandpaper.
less than 1.6470 inches.
(b) Temporarily install brushes and commutator
(11 ) Use an ohmmeter to check field coils for insula-
end frame and run in brushes.
tion breakdown as follows:
(c) Disassemble, remove sandpaper, and clean
(a) Attach one lead to field housing and the
armature commutator and brushholder assembly with
other lead to field coil terminal.
filtered compressed air.
(b)' Replace field coil if a reading of less than 1
megohm is indicated.
(1) Test starter solenoid assembly as follows:
(12) Inspect drive assembly for badly worn or broken
teeth. Check internal spline for wear and damage. Replace
drive assembly if defective.
(b) Apply 24 Vdc Between the negative terminal
( 13) Inspect brushholders and support for cracks, cor-
and the small terminal of the solenoid assembly.
rosion, and other damage. Replace defective parts.
(c) Solenoid actuation will be indicated by an
( 14) Measure brush length. Replace brushes if length
audible "click" and rearward movement of the drive gear.
is 5/16 inch or less.
(d) Remove 24 Vdc from solenoid assembly ter-
( 15) Test brush spring tension with a spring tester.
Tension shall be 36 ounces to 40 ounces. Replace brush
springs if tension is less than specified.
(e) The drive gear should move forward with an
( 16) Inspect all threaded parts for crossed, stripped or
penned threads. Replace damaged parts.
(f) Replace solenoid assembly if it fails to func-
minals of solenoid frame assembly. There shall be no sign
of open circuit,
(g) Install connector.
(2) Conduct starter assembly motoring test as follows:
(18) Check solenoid frame assembly for grounding by
touching one lead of ohmmeter to either lead and the other
to the frame casing. There shall be no sign of continuity.
(b) Install starter assembly into motoring test
(19) Smooth scratches, burrs. and nicks on any machin-
ed surfaces using a fine file. Remove all fillings before re-
(c) Adjust rheostat until voltmeter indicates
(20) Repair minor thread damage using thread chasers,
taps and dies. Clean threads to remove metal particles.
(d) Check indications of ammeter and tachome-
(21 ) Remove minor rough spots, scores, and scratches
from bushings using crocus cloth or a fine stone dipped
(e) Ammeter should indicate 58 amperes maxi.
in cleaning solvent. Wash the bushings thoroughly in clean-
mum with starter turning at 9300 rpm.
ing solvent to remove all grit and metal particles.