Brush spring

1. Measure the force of the brush spring using a spring pressure gauge.
2. Read the spring pressure gauge at the brush tip projection of 2 mm {0.08 in}. 

• Replace the brush spring if necessary.

Generator brush spring force Standard: 4.1-5.3 N {0.42-0.54 kgf, 1.0-1.1 lbf} 

Minimum: 1.7 N {0.17 kgf, 0.38 lbf} 

Fig 1: Measuring Force Of Brush Spring Using Spring Pressure Gauge

Courtesy of MAZDA MOTORS CORP.