Brushes & Springs
Check brush spring tension using a suitable spring scale (see specifications ). Check brush contact surface condition. If brush contact is loose, replace brush. If brush height is less than 0.374" (Datsun with manual transmission) 0.453" (Colt), or 0.50" (LUV and all other Datsuns), replace brushes. On Mazda models, brush is allowed 33% wear before replacement is required. Check lead clip and wire connection, check condition of brush holders and spring clip, repair or replace parts as necessary.
Brush Spring Tension
| Application | Tension | |
|---|---|---|
| Colt & Cricket | ||
| 1971-72 | 56 oz. (1.6 kg) | |
| 1973 | 48 oz. (1.3 kg) | |
| Datsun | ||
| 2000 Roadster | 34 oz. (.9 kg) | |
| 240Z (1970-71) | 28 oz. (.8 kg) | |
| 240Z (1972-73) | 56 oz. (1.6 kg) | |
| All Others (1963-72) | 28 oz. (.8 kg) | |
| All Others (1973) | 50 oz. (1.4 kg) | |
| Honda (1971-72) | 28 oz. (.8 kg) | |
| LUV(1971-73) | 28 oz. (.8 kg) | |
| Mazda | ||
| 1971-72 | 38 oz. (1.0 kg) | |
| 1973 | 56 oz. (1.6 kg) | |