Heating Ventilation and Air Conditioning (HVAC) Sensor May Fail on Certain 745 Articulated Trucks {1439, 7320}
- Articulated Truck
- 745 (S/N: 3F61197-UP; 3T61-1333,1335-UP)
Introduction
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| Revision History | |
|---|---|
| Revision | Summary |
| 01 | Changes were made to the solution and problem section |
The problem that is identified below does not have a known permanent solution. Until a permanent solution is known, use the solution that is identified below.
Problem
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| Illustration 1 | g06411334 |
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Typical example of discolored temperature sensor (A) | |
Heating Ventilation and Air Conditioning (HVAC) 233-6131 Temperature Sensor Gp may fail on the machines listed above. The failure can be caused by overheating of the sensor by an external heat source. The temperature due to overheating exceeds the sensor specification and leads to sensor discoloration and thermistor damage.
Solution
Caterpillar is aware of this problem, but an interim repair has not been defined. In the event of failure, replace the failed 233-6131 Temperature Sensor Gp with the same new part.
Note: Use a container with hot water, to heat the sensor as per sensor specification.
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