Usage:
| 04Sep2015 |
| (Revised 21Oct2015) |
| Before/After Parts stock action needed | PRODUCT SUPPORT PROGRAM FOR REWORKING THE 4635278 LEFT HAND ENGINE WIRING HARNESS ON CERTAIN 793F OFF-HIGHWAY TRUCKS |
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| 1408 7750 | PS44850 |
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| 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. |
| 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 "PS44850" 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: | When submitting claim for Parts Stock Action, Use the appropriate 99Z as the s/n, the appropriate Service Letter Program Number as the Part number in the Part Causing Failure field, "7755" as the Group Number, "56" as the Description Code. |
| NOTE: | Although this Program is to be administered as described above on the Affected Product, parts should be removed from parts stock as soon as possible. |
| 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. |
| NOTE: | This Revised Service Letter replaces the 04Sep2015 Service Letter. Changes have been made to the Action Required. |
TERMINATION DATE |
| 30Sep2017 |
PROBLEM
| The J1939 CAN data link may be pinned incorrectly on the 463-5278 Harness Assemblies on certain 793F Off-Highway Trucks. |
AFFECTED PRODUCT
| Model | Identification Number |
| 793F | SSP01072-01074, 1078-1087, 1091-1102, 1108-1125, 1129, 1131-1132 |
| 793F OEM | SXP00101-00103 |
| 793F XQ | SND00132-00133 |
PARTS NEEDED
| No parts needed for this program |
ACTION REQUIRED
Rework the following 3981018 and 4576736 Engines in dealer parts stock and/or dealer exchange inventory: |
| On the EL-C1 connector, the wires landed at pins 58 and 61 may need to be switched. Pin 61 should be CAN+,YL-19 and Pin 58 should be Shield,CU -19. The correct wires are shown in Image 1. At the EL-C24 connector, the wires landed at pins 37 and 39 may need to be switched. Pin 37 should be CAN+, YL-19 and Pin 39 should be Shield, CU-19. The correct wires are shown in Image 2. |
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| Image1 |
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| Image2 |
SERVICE CLAIM ALLOWANCES
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Submit one claim for each engine reworked in dealer parts stock and/or dealer exchange inventory. Include engine serial number and arrangement number in the claims story. |
0-48 mo |
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| NOTE: This is a 2.0-hour job
If there has been a previous repair, part age/hours will apply. Retain a copy of the previous repair invoice in the dealer's records for audit purposes, and specify repair date and machine hours in the "Additional Comments" section of the warranty claim. |
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PARTS DISPOSITION
| Handle the parts in accordance with your Warranty Bulletin on warranty parts handling. |
| Handle the parts in accordance with your Warranty Bulletin on warranty parts handling. |