F10134 Force CHOKE SHAFT AND LEVER

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PSP FOR INSTALLING A NEW 7C7557 VOLTAGE REGULATOR ON CERTAIN 3114, 3116, 3208, 3306, AND 3406 GENERATOR SET ENGINES (BSSB) EQU IPPED WITH A SR4 GENERATOR - PS4538 - MAILED US AND CANADA, CACO, COFA, CFEL, COSA - REVISED 01/91
  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.
(Revised January 1991) U-248 A-171 AU-157 E-152 O-190 4467 PS4538 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 "PS4538" as Part Number, "7755" as Group Number, and "96" as Description Code. This Revised Service Letter replaces the December 14, 1990 Service Letter. Changes have been made to the Action Required. Termination Date
December 31, 1991
Problem
The 7C7557 Voltage Regulator (VR4 Type) on certain 3114, 3116, 3208, 3306, and 3406 Generator Set Engines (BSSB) equipped with a SR4 Generator may fail if there is not enough clearance between the resistor and potting epoxy.
Affected Product
Model Identification Number 3114* 6AF1-Up 3116* 2SG1-Up 3208* 5YF1-Up 3306* 2AJ1-Up 3406B* 4RG1-Up * If equipped with a SR4 Generator having a 7C7557 Voltage Regulator with an identification number between 600,000 and 603590.
Parts Needed
1 - 7C7557 Voltage Regulator
Action Required
Make a gauge from a strip of wood such as a tongue depressor. See Illustration 1. Use the gauge as shown in Illustration 2 to check the amount of clearance between the epoxy and the resistor body. If the gauge will not fit between the resistor body and the epoxy, follow the procedures in the Service Manual to remove the existing regulator from the generator and install a new one. ****** IMAGE: SEBE4469.01001.001 CAPTION: Dimensions For Wood Gauge ****** IMAGE: SEBE4469.01001.002 CAPTION: Epoxy Clear Of The Resistor Body Do Not Replace The 7C7557 Voltage Regulator ****** IMAGE: SEBE4469.01001.003 CAPTION: Epoxy In Contact With The Resistor Body Replace The 7C7557 Voltage Regulator
Service Claim Allowances
Product Caterpillar Dealer Suggested Customer Suggested smu Parts Labor Hrs. Parts Labor Hrs. Parts Labor Hrs. (C/L) (Sell) 0-5000 100% 1 0 0 0 0 This is a 1-hour job.
Parts Disposition
Any parts removed (with the exception of cores used for Caterpillar Remanufactured parts) can be rendered useless and scrapped immediately upon completion of the repair.