Carbon brush
Inspect the brushes for abnormal wear, cracks, or smoothness in the brush holder.
If any damage is found, replace the brush assembly with a new one.
Commutator
Inspect the commutator for discoloration, abnormal wear or undercut (A).
If abnormal wear is found, replace the armature with a new one.
If the commutator surface is discolored, polish it with #400 sand paper and wipe it using a clean dry cloth.
If there is no undercut, scrape out the insulator with a saw blade.
1. Insulator; 2. Segment
Armature coil inspection
Check for continuity between each segment and between each segment and the armature shaft using the multi circuit tester.
If there is no continuity between the segments or there is continuity between the segments and shaft, replace the armature with a new one.
- 09900-25008: Multi circuit tester set
- Tester knob indication: Continuity test (•)))
Oil seal inspection
Check the oil seal lip for damage or leakage.
If any damage is found, replace the housing end.
