Brush Holder: Testing and Inspection

Checking Continuity Of Brush Holders:

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

Checking 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.

Spring Tension:

Nippondenso: 19 - 24 N (1.9 - 2.4 kg, 3.7 - 5.3 lbs)
Mitsuba: 16 - 18 N (1.6 - 1.8 kg, 3.5 - 4.O lbs)