Alternator Charge Rate Is Low
- Loose alternator drive belt
- Loose alternator drive pulley
- Charging circuit
- Regulator is defective
- Rectifier is defective
- Brushes are worn or dirty
- Inspect the condition of the alternator drive belts. If the alternator drive belts are worn or damaged, replace the belts.
- Check the tension on the alternator drive belts. Adjust the tension, if necessary.
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.
Install a new regulator assembly.
Install a new rectifier.
Install new brushes.
Caterpillar Information System:
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