Brush & Brush Holder
Perform insulation test between brush holder (positive side) and its base (negative side). If continuity exists, replace brush holder. Ensure brushes move smoothly and are not worn beyond specification. If brush holder sliding surface is dirty, clean it. Check brush spring pressure with brush spring detached from brush. See MINIMUM BRUSH LENGTH & BRUSH SPRING TENSION table. Replace as necessary.
MINIMUM BRUSH LENGTH & BRUSH SPRING TENSION (1)
| Application | In. (mm) | Lbs. (kg) | |||
|---|---|---|---|---|---|
| G20 | |||||
| Hitachi | .43 (11) | 3.96-4.86 (1.8-2.2) | |||
| Mitsubishi | .47 (12) | 3.1-5.7 (1.4-2.6) | |||
| M30 | |||||
| Hitachi | .47 (12) | 4.0-4.9 (1.8-2.2) | |||
| Mitsubishi | .45 (11.5) | 3.1-5.7 (1.4-2.6) | |||
| Q45 | .47 (12) | 3.1-5.7 (1.4-2.6) | |||
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