Ranger 4WD V6-30L Starter Armature Testing & Inspection
Starter Armature: Testing and Inspection
Armature Replacement
CAUTION: Do not wash the starter drive because the solvent will wash out the lubricant causing starter drive to slip. Use a brush or compressed
air to clean the starter drive, starter motor armature, brush, and gear assemblies, drive end housing, pole pieces and planet gears. Wash all other
parts in solvent and dry.
1. Inspect windings for broken or burned insulation and unwelded or open connections.
2. Check starter motor armature for open circuits, shorts, and grounds. Check for pole rub or rub on magnetic shunts.
3. Check commutator for runout. Inspect starter motor armature shaft and two bearings for scoring and excessive wear with Dial Indicator
D87L-4201-A and Magnetic Base D87L-4201-B or equivalents. If commutator is rough, or more than 0.12 mm (0.005 inch) out of round, it must
be replaced.
Field Coil Inspection
With starter motor disassembled, check field coil windings with a growler lamp for shorts to housing or poles.
