Alternator Brush: Testing and Inspection

Brush




If brushes are worn to, or beyond limit, replace them.

Standard: 0.85 in (21.5 mm)
Minimum: 0.32 in (8.0 mm)

Brush spring
1. Measure force of brush spring with a spring pressure gauge.
2. Replace the spring if necessary.

Standard force:
0.71-0.93 lb-ft
(3.1-4.1 N.m, 0.32-0.42 kg-m)

Minimum:
0.36-0.52 lb-ft
(1.60-2.4 N.m, 0.16-0.24 kg-m)




Read spring pressure with brush tip protecting 0.08 in (2 mm).