Starter Brush Holder Test / Starter Brush Inspection
16-42prose procedureSpring tension and brush length specs differ between ND and Mitsuba starter types.
Starting System
Starter Brush Holder Test
- 1Check that there is no continuity between the ⊕ and ⊖ brush holders. If continuity exists, replace the brush holder assembly.
- 2Insert the brush into the brush holder, and bring the brush into contact with commutator, then attach a spring scale to the spring. Measure the spring tension at the moment the spring lifts off the brush.
| Specification | Value |
|---|---|
| Spring Tension (ND) | 18.5-24.4 N (1.85-2.44 kg, 4.1-5.41 lb) |
| Spring Tension (Mitsuba) | 20.5-27.0 N (2.05-2.70 kg, 4.5-6.016 lb) |
Spring Tension (ND)
18.5-24.4 N (1.85-2.44 kg, 4.1-5.41 lb)
Spring Tension (Mitsuba)
20.5-27.0 N (2.05-2.70 kg, 4.5-6.016 lb)
Starter Brush Inspection
Measure brush length. If not within service limit, replace the armature housing and brush holder assembly.
Brush Length
ND
Standard (New)12.5-13.5 mm (0.49-0.53 in)
Service Limit8.5 mm (0.33 in)
Mitsuba
Standard (New)14.3-14.7 mm (0.56-0.58 in)
Service Limit9.3 mm (0.37 in)
NOTE
To seat new brushes after installing them in their holders, slip a strip of #500 or #600 sandpaper, with the grit side up, over the commutator, and smoothly rotate the armature. The contact surface of the brushes will be sanded to same contour as the commutator.