BEARING-SLEEVE 4154568 - Caterpillar

Caterpillar: Confidential Yellow
PSP FOR INSTALLING A NEW 9Y8400 VOLTAGE REGULATOR ON CERTAIN 3208, 3304, 3306, 3406, 3408, 3412, 3508, 3512, AND 3516 GEN ERATOR SET ENGINES EQUIPPED WITH A SR4 GENERATOR - PS4508 - MAILED US AND CANADA, CACO, COFA, CFEL, COSA
  The information supplied in this service letter may not be valid after the termination date of this program.   Do not perform the work outlined in this Service Letter after the termination date without first contacting your Caterpillar product analyst.
U-150 A-101 AU-96 E-93 O-116 4467 PS4508 This Program can be administered either before or after a failure. In either case the decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS4508" as Part Number, "7755" as Group Number, and "96" as Description Code. Termination Date
July 31, 1991
Problem
The 9Y8400 Voltage Regulator (VR3 Type) on certain 3208, 3304, 3306, 3406, 3408, 3412, 3508, 3512, and 3516 Generator Set Engines equipped with a SR4 Generator may have internal interference between a capacitor and a reactor. This interference may cause the voltage regulator to fail. The 9Y8400 Voltage Regulators that may have this interference have identification numbers between 118100 and 119687 on their identification plate.
Affected Product
Model Identification Number 3208* 29A1-Up 30A1-Up 5YF1-Up 3304B* 83Z1-Up 3306* 2AJ1-Up 07Y1-Up 85Z1-Up 3406B* 2WB1-Up 4FD1-Up 4RG1-Up 3408B* 6NB1-Up 78Z1-Up 3412* 7DB1-Up