Charging & Starting System
Cleaning and Inspection
- Clean all starter motor parts.
- Check pinion teeth for chips, cracks, or excessive wear.
- Replace the drive clutch spring and/or collar if tension is not adequate or if wear is excessive.
- Inspect brush holder for damage or for failure to hold brushes against commutator.
- Replace brushes that are pitted or worn to less than 1/4 in. in length.
- Inspect the armature conductor for a tight connection. A loose connection results in a burned commutator bar.
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Resurface and undercut a rough commutator as follows:
CAUTION! Do not turn down the commutator excessively.
- Resurface the commutator and undercut the insulation between the commutator bars 1/32 in. (0.8mm) to the full width of the insulation and so that the undercut is flat.
- Clean the commutator slots after undercutting.
- Sand the commutator lightly with No. 00 sandpaper to remove burrs, then clean the commutator.
- Recheck the armature on a growler for shorts as specified in the following procedure (Testing).
- Open-circuited armatures often can be repaired...
- Repair bars, that are not excessively burned, by resoldering the leads in bars (using rosin flux solder) and turning down the commutator in a lathe to remove burned material, then undercut the mica.
- Clean out the copper or brush dust from slots between the commutator bars.
- Check the armature for ground.
