Alternator

Generator
Rotor coil resistance at 20�C (68�F) 2.3 to 2.7 Ohms
Slip ring diameter
Standard 14.2 to 14.4 mm (0.559 to 0.567 in.)
Minimum 14.0 mm (0.551 in.)
Brush exposed length
Standard 10.5 mm (0.413 in.)
Minimum 4.5 mm (0.177 in.)