Alternator Is Noisy
- Alternator drive belt
- Alternator drive pulley
- Drive belt and drive pulley for alternator are not in alignment
- Alternator bearings
Install a new drive belt for the alternator.
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.
Drive Belt and Drive Pulley for Alternator are not in Alignment
Adjust to put the drive belt and drive pulley in correct alignment.
Install new bearings in the alternator.
Caterpillar Information System:
Alternator - Bosch K1/N1 Alternator Charge Rate Is High
Alternator - Bosch K1/N1 Alternator Charge Rate Is Low
Alternator - Bosch K1/N1 Alternator Will Not Charge
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