B4000 SE Cab Plus 4WD V6-4.0L OHV (1997)
2. Check for no continuity between the commutator and the shaft. Replace the armature if there is continuity.
3. Inspect the armature windings for broken or burned insulation and unwelded or open connections.
4. Place the armature on V-blocks and measure the runout by using a dial indicator.
If the runout is not within the specification, replace the armature.
Maximum Runout: 0.12 mm {0.005 in}
5. If the commutator surface is dirty, wipe it with a cloth; if it is rough or out of round, replace the armature.
NOTE
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Do not wash the armature with solvent.
Internal gear and planetary gears
Check for wear and damage. Replace as necessary.
Yoke
Check for damage. Replace as necessary.
Pinion and reduction gear
Check for wear and damage. Replace as necessary.