Impreza 2.5 RS Sedan AWD F4-2.5L SOHC (2002)
Brush Holder: 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.
2. Brush movement: Be sure the brush moves smoothly inside brush holder.
3. Brush spring force: Measure the brush spring force with a spring scale. If it is less than the service limit, replace the brush holder.
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)