- Electric Power Generation:
- C4.4 GEN SET (S/N: D4B1-UP; D4D1-UP; GLD1-UP; GLE1-UP)
- C6.6 GEN SET (S/N: N6D1-UP; MRW1-UP)
Introduction
This Special Instruction is written to provide information about wiring changes that may be needed. The wiring changes can apply to the serial numbers that are listed above. If the generator does not show any signs of problems, then no wiring changes are needed.
If any of the following symptoms are present, the wiring must be checked and if needed, corrected:
- Alarms are not cleared during generator set operational test
- Shut down logs are not cleared during generator set operational test
- Unable to connect the service tool
The information in this Special Instruction is provided to confirm the wiring from the EMCP 3 and the Engine Control Module (ECM) to the service connector.
Important Safety Information
Work safely. Most accidents that involve product operation, maintenance, and repair are caused by failure to observe basic safety rules or precautions. An accident can often be avoided by recognizing potentially hazardous situations before an accident occurs.
A person must be alert to potential hazards. This person should also have the necessary training, skills, and tools in order to perform these functions properly.
Safety precautions and warnings are provided in this instruction and on the product. If these hazard warnings are not heeded, bodily injury or death could occur to you or to other persons. Caterpillar cannot anticipate every possible circumstance that might involve a potential hazard.
Therefore, the warnings in this publication and the warnings that are on the product are not all inclusive. If tools or procedures not recommended by Caterpillar are used, ensure that all of the tools and procedures are safe to use.
Ensure that the product will not be damaged or become unsafe due to the use of tools or procedures not recommended by Caterpillar.
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Only persons with training in electrical installations must carry connections to the generator. The generator must be wired correctly. A fire or electrocution could result from wiring that is incorrect. The generator is capable of generating high voltages. Ensure that the generator is not on while the connections are being made. Follow these two steps in order to prevent accidental starting:
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High voltage may be present. The power source must be disconnected before working on the equipment. Failure to disconnect the power source could result in injury or death. Verify that the equipment is not energized before performing any maintenance. This work must be performed by trained personnel with correct tools and procedures. |
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Bodily contact with electrical potential can cause bodily injury or death. To avoid the possibility of injury or death, ensure that the main power supply has been disconnected before performing any maintenance or removing any modules. |
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Wiring Connections
The wiring connections are in the EMCP 3 enclosure.
- Check the wiring at the service connector (3) .
- Check the wiring at the terminal strip connection (5), (6), and (7). If the wiring is incorrect at the terminal strip, the wiring changes can be made at the wiring strip.
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| Illustration 1 | g02177443 |
(1) EMCP 3 (2) EMCP 3 enclosure (3) Gray service connector | |
- Check the wiring at the engine ECM connector.
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| Illustration 2 | g02177444 |
EMCP 3 to service connector wiring | |
- Ensure all of the wiring connections are complete. Verify that the generator functions properly.
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| Illustration 3 | g02177446 |
Engine ECM connections for Datalink | |