Alternator Will Not Charge
- Alternator drive belt
- Alternator drive pulley
- Charging circuit
- Rotor field winding or Regulator is defective
Adjust the alternator drive belt.
Check the key groove in the pulley for wear. If the groove is worn, install a new pulley. Tighten the pulley nut to the correct torque. Refer to Specification for the correct torque.
Inspect the battery cables, wiring, and connections in the charging circuit. Clean all connections and tighten all connections. Replace any faulty parts.
Rotor field Winding or Regulator is Defective
Install a new rotor or regulator assembly.
Caterpillar Information System:
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