CAT 955L Engine and Transmission Temperature Sensor Troubleshooting and Solutions

[MikePhua]

The CAT 955L is a widely used crawler dozer in construction and excavation operations, where the engine and transmission temperature sensors are crucial for ensuring proper operation. If these sensors malfunction, it can lead to inaccurate temperature readings, impacting the machine’s performance and potentially causing severe damage. This article discusses common issues with the engine and transmission temperature sensors on the CAT 955L and how to resolve them.
Common Symptoms of Sensor Failure
When the engine and transmission temperature sensors in the CAT 955L fail, the most common symptoms are inaccurate or completely absent temperature readings. Operators may notice erratic temperature readings on the dashboard or no reading at all. In some cases, the machine may even trigger an overheating warning. The causes of sensor failure could include loose connections, electrical issues, sensor damage, or problems in the wiring.
Checking the Engine and Transmission Temperature Sensors
When temperature readings are abnormal, the first step is to check the sensors themselves. Begin by inspecting the sensor connections to ensure they are not loose, and check for any signs of wear or corrosion on the cables and connectors. Next, inspect the sensor for visible damage such as cracks or burn marks. If the sensor appears intact, you can use a multimeter to test its resistance and verify if it’s within the proper range.
If the sensor and connections seem fine, the next step is to check the wiring and connectors. Use a test light to check the electrical circuits and ensure the signal is properly reaching the dashboard or control module. If there’s a break in the circuit or a short, it will need to be repaired promptly.
Replacing a Faulty Sensor
If a sensor is determined to be faulty, the most straightforward solution is to replace it with a new one. When replacing the sensor, be sure to select a genuine part that is compatible with the CAT 955L. During removal, take care not to damage surrounding components. Ensure that the new sensor is installed securely and that all connections are tight to avoid issues with loose fittings.
Preventive Measures for Sensor Failure
To prevent similar sensor failures, it is recommended to perform regular maintenance and checks on the machine. Pay special attention to the condition of the electrical system and wiring, and clean connectors to prevent corrosion. Regular fluid changes and cleanings also help extend the life of the sensors.
Conclusion
The engine and transmission temperature sensors in the CAT 955L are vital for the proper functioning of the machine. When inaccurate temperature readings occur, it’s important to first check the sensor and electrical connections to identify the root cause of the issue. Regular maintenance and checks can help prevent sensor failure and ensure the long-term reliability of the equipment. If a sensor needs to be replaced, always use genuine parts and ensure proper installation to avoid further problems.