Brush spring

Measure the force of the brush spring using a spring pressure gauge.
Read the spring pressure gauge at the brush tip projection of 2 mm {0.079 in}.
- Replace the brush spring if necessary.
  Standard force
  
  L3: 4.8-6.0 N {0.49-0.61 kgf, 1.08-1.35 lbf}
  
  AJ: 4.1-5.3 N {0.42-0.54 kgf, 0.92-1.19 lbf}
  
  Minimum
  
  L3: 2.2 N {0.22 kgf, 0.49 lbf}
  
  AJ: 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.