Brush Holder: Testing and Inspection

Brush Holder Inspection:

1. Check that there is no continuity between the + and - brush holders. If continuity exists, replace the brush holder assembly.

Starter Brush Spring Tension:

2. Insert the brush into the brush holder, and bring the brush into contact with the commutator, then attach a spring scale to the spring. Measure the spring tension at the moment the spring lifts off the brush.