Starter Brush: Testing and 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.

Brush length:
Standard 17.0 mm (0.669 in)
Service limit 11.5 mm (0.453 in)

2. Brush movement
Be sure brush moves smoothly inside brush holder.
3. Brush spring force
Measure brush spring force with a spring scale. If it is less than the service limit, replace brush spring.

Brush spring force:
Standard
21.6 N (2.2 kg, 4.9 lb) (when new)

Service limit
5.9 N (0.6 kg, 1.3 lb)