Before/After
| PRODUCT SUPPORT PROGRAM FOR REWORKING THE WIRING OF GENERATOR EXCITATION POWER SUPPLY ON CERTAIN 3412C GENERATOR SETS |
1408 7426
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PS45519 |
NOTE: |
Caterpillar’s obligations under this Service Letter are subject to, and shall not apply in contravention of, the laws, rules, regulations, directives, ordinances, orders, or statutes of the United States, or of any other applicable jurisdiction, without recourse or liability with respect to Caterpillar.
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NOTE: |
This Program must be administered either before or after failure.
In either case the decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS45519" as the Part Number
and "7755" as the Group Number. If administered before failure, use "56" as the Warranty Claim Description Code and "T" as the SIMS Description code.
If administered after failure, use "96" as the Warranty Claim Description Code, and "Z" as the SIMS Description Code. |
NOTE: |
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. |
The wires no.N705 and no.N706 for generator excitation current supply have been connected to the 2-way connector A-C11 with wrong polarity on the main harness 472-0412 on certain 3412C Generator Sets. This may lead to the damage or failure of generator exciter stator over long-time operation. |
No parts needed for this program |
Refer to the Safety Section of the Operation and Maintenance Manual prior to doing any rework.
Swap the two wires on 2-way connector A-C11 to ensure that wire N705 and N706 are respectively connected to pin no.1 and no.2, as shown in Image1. Use pin extraction tool (4C-4074 or 6V-4812) to extract the pins from connector A-C11. Please refer to media SEHS8038 for the guide of using pin extraction tool.
A-C11 is located behind the control module in panel, as shown in Image2. |
Product smu/age whichever comes first |
Caterpillar |
Dealer Suggested |
Customer Suggested |
Parts % |
Labor Hrs% |
Parts % |
Labor Hrs% |
Parts % |
Labor Hrs% |
0-12000 hrs, 0-24 mo |
100.0% |
100.0% |
0.0% |
0.0% |
0.0% |
0.0% |
NOTE: This is a 1.0-hour job
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Handle the parts in accordance with your Warranty Bulletin on warranty parts handling. |
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