STEP 4788096 - Caterpillar

Personal injury can result from escaping fluid under pressure.If a pressure indication is shown on the indicator, push the release valve in order to relieve pressure before removing any hose from the radiator.
Introduction
Use this procedure to check the coolant temperature sensor.Required Tools
Table 1
Required Tools
Part Number Part Name Qty
2F-7112 Thermometer 1
6B-5072 Reducing Bushing 1 Test Preparation
Illustration 1 g00769081
Test location
(1) Plug
Turn off the engine.
Allow the engine to cool.
Remove plug (1).
Install the 6B-5072 Reducing Bushing and the 2F-7112 Thermometer.
Connect Cat®Electronic Technician (ET) to the service tool connector.Test Procedure
Note: Ensure that the coolant level is at the correct level before performing this test.
Start Cat ET.
Start and run the engine until the temperature reaches the desired range according to the test thermometer.
Monitor the coolant temperature on Cat ET. Monitor the coolant temperature on the test thermometer.
Compare the coolant temperature on Cat ET to the coolant temperature on the test thermometer. If the two measurements are about equal, the sensor is okay. If the two measurements are not about equal, there may be a problem with the sensor. Install a new sensor and verify that the problem is resolved.