Starter Brush: Testing and Inspection
BRUSH CHECK1. Check the brush for roughness of the surface that contacts the commutator and check the brush length. Replace the brush holder if this measurement exceeds the limit.
Minimum limit: 7.0 mm (0.28 inch)
2. If the contacting surface has been corrected or the brush has been replaced, correct the contacting surface by winding sandpaper around the commutator.