Chapter V Disassembly & Repair
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Charging System
Charging System Operational Inspection
1. Check battery condition.
2. Always check battery condition before condemning other parts of the charging system. The battery must be fuly
charged in order to conduct accurate charging system tests.
3. Warm up the engine to bring the components up to their normal operating temperatures.
4. Measure regulated output voltage at various engine speeds. Connect a voltmeter across the battery terminals.
5. The readings should show nearly battery voltage when the engine speed is low, and as the engine speed rises, the
readings should also rise. But they must stay within the specified range.
6. If the output voltage is much higher than the specification, the regulator is defective, or the regulator leads are
loose or open. If the output voltage dose not rise as the engine speed increase, the regulator is defective or the alternator
output is insufficient for the loads.
7. Regulated Output Voltage Battery Voltage to 14 VDC
Charging Stator Check
1. When the engine is running, the multimeter is placed in the AC file to check whether the output terminal of the
charging coil is output or not. If there is no output, please replace the charging coil.
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