Tribeca F6-3.6L (2008)
Starter Motor: Testing and Inspection
Starter Motor
INSPECTION
1. ARMATURE
1. Check the commutator for any sign of burns of rough surfaces or stepped wear. If it has minor wear, correct it by using sand paper (#300).
2. Run-out test
Check the commutator for run-out, and then replace if it exceeds the limit.
Commutator run-out:
Standard - 3.1 mm (0.1220 in)
Service limit - 3.8 mm (0.1496 in) or less
3. Armature short-circuit test
Check the armature for short circuit by placing it on growler tester. Hold an iron sheet (thickness gauge, etc.) against the armature core while
slowly rotating the armature. A short-circuited armature will cause the iron sheet to vibrate and to be attracted to core. If the iron sheet is
attracted or vibrates, the armature, which is short-circuited, must be replaced or repaired.
4. Armature discontinuity test
Using a circuit tester, touch one probe to the Armature and the other to commutator. No continuity is normal. If there is continuity, the
armature is grounded. Replace the armature if it is grounded.
