4A-22 - STARTING SYSTEM 90-823225--1 1096
Cleaning and Inspection
IMPORTANT: Do not use grease dissolving sol-
vents to clean electrical components, planetary
gears, or drive. Solvent will damage insulation
and wash the lubricant out of the drive and gears.
Use clean rags and compressed air to clean com-
ponents.
1. Test over-running clutch action of drive. Pinion
should turn freely in over-running direction and
must not slip in cranking direction. Check pinion
teeth. Check spring for tension and drive collar
for wear. Replace if necessary.
2. Check that brush holders are not damaged or
bent and hold brushes against commutator.
Check brushes for wear; refer to “Brushes and
Brush Holder.”
3. Inspect armature commutator. If badly grooved
or out-of-round, turn down and undercut commu-
tator.
4. Inspect all roller bearing surfaces for wear. Check
that bearings roll freely. If any roughness is felt,
replace bearings.
5. Inspect planetary gear assembly. Gears must
mesh easily and roll freely with no binding.
Armature Tests
TEST FOR SHORTS
Check armature for shorts by placing on growler and
holding hack saw blade over armature core while ro-
tating armature. If saw blade vibrates, armature is
shorted. After cleaning between commutator bars,
recheck. If saw blade still vibrates, replace armature.
01440
b
c
a
a - Hacksaw Blade
b - Armature Core
c - Growler
TEST FOR GROUND
1. With continuity meter, place one lead on arma-
ture core or shaft and other lead on commutator.
2. If meter hand moves, armature is grounded and
must be replaced.
01441
b
c
d
a
c
a - Commutator
b - Armature Core
c - Shaft
d - Growler
Armature Bearing (Commutator End)
REMOVAL
Use a universal puller plate, as shown, to remove
bearing.
72068
b
a
a - Universal Puller Plate
b - Bearing
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