Bench Testing: Brushes

Brushes should slide smoothly in holders. Replace brushes if damaged or worn. New brush exposed length should be .413" (10.5 mm). Minimum exposed length should be more than .059" (1.5 mm). There are 2 different brush holders used. One brush holder is replaced as an assembly, and the other has replaceable brushes. If exposed brush length is less than minimum, replace brushes or brush holder assembly. Install new brush springs when replacing brushes.