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 spring force
- 4.8-6.0 N {0.49-0.61 kgf, 1.08-1.34 lbf}
Minimum spring force
- 2.16 N {0.22 kgf, 0.49 lbf}