Starter Brush: Testing and Inspection

INSPECTION

BRUSH AND BRUSH HOLDER




1. Brush length
Measure the brush length and replace if it exceeds the service limit.
Replace if abnormal wear or cracks are noticed.
2. Brush movement
Be sure brush moves smoothly inside brush holder.




3. Insulation resistance of brush holder
Be sure there is resistance of 1 MOhm or more between brush holder and its plate.