PLATE AS.-RH 3079568 - Caterpillar

Probable Causes
Alternator drive belts
Alternator drive pulley
Alternator bearingsRecommended Actions
Alternator Drive Belts
Inspect the condition of the alternator drive belts. If the alternator drive belts are worn or damaged, replace the belts. Refer to Disassembly and Assembly, "V-Belts - Remove and Install". Ensure that the alternator drive belts are in alignment. Inspect the alternator mounting bracket for cracks and wear. Repair the mounting bracket or replace the mounting bracket in order to ensure that the alternator drive belts and the alternator drive pulley are in alignment.
Check the tension on the alternator drive belts. Adjust the tension, if necessary. Refer to Disassembly and Assembly, "V-Belts - Remove and Install". Alternator Drive Pulley
Loosen the nut for the alternator drive pulley and tighten the nut to the correct torque. Refer to Specifications, "Alternator and Regulator" for the correct torque.Alternator Bearings
Check for excessive play of the shaft in the alternator and check the alternator bearings for excessive wear. The alternator is a nonserviceable item. The alternator must be replaced if the bearings are worn. Refer to Disassembly and Assembly, "Alternator - Remove" and Disassembly and Assembly , "Alternator - Install".