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Sudden movement of the machine or release of oil under pressure can cause injury to persons on or near the machine. To prevent possible injury, perform the procedure that follows before testing and adjusting the power train. |
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Personal injury can result from hydraulic oil pressure and hot oil. Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system. Make sure all of the attachments have been lowered, oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand. |
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Escaping fluid under pressure, even a pinhole size leak, can penetrate body tissue, causing serious injury, and possible death. If fluid is injected into your skin, it must be treated immediately by a doctor familiar with this type of injury. Always use a board or cardboard when checking for a leak. |
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Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products. Dispose of all fluids according to local regulations and mandates. |
When a power train problem is being defined, the following procedure should be used.
Note: This machine is equipped with a power train electronic control module (ECM). The power train ECM is equipped with built-in diagnostics that detect faults in the electronic system of the power train.
- Use the built-in electrical diagnostics that are performed with the Vital Information Management System (VIMS) and with the power train ECM in order to check for any active service codes for the power train ECM.
Reference: For more information on the diagnostic procedures for the power train ECM, refer to the Service Manual module Systems Operation, Testing and Adjusting, RENR2522, "Power Train Electronic Control System".
Reference: For more information on the diagnostic procedures for the Vital Information Management System (VIMS), refer to the Service Manual, SENR6059, "Vital Information Management System (VIMS)".
- Perform visual checks. If the visual checks are completed but the problem has not been identified, perform operational checks. If the problem is not understood, perform instrument tests. This procedure will help to identify power train problems.
- When the problem has been specifically identified as coming from a power train component, refer to the following topics for the probable causes of a known problem. Testing and Adjusting, "Torque Converter Troubleshooting", Testing and Adjusting, "Transmission Troubleshooting" and Testing and Adjusting, "Differential and Final DriveTroubleshooting".
- There may be more than one cause for a problem. The Service Manual module Testing and Adjusting, RENR2506 may suggest specific inspections or specific instrument tests that should be performed.
Note: The inspections and the tests that are found in the reference literature will help to identify the most probable causes of a problem. The reference literature cannot include all of the possible problems and all of the corrections. The service personnel must find the problem and the source of the problem. Then, the necessary repairs can be made.