HEAD 9J0496 - Caterpillar

Remove & Install Water Temperature Sensor
At operating temperature, the engine cooling system is hot and under pressure. Steam can cause personal injury. Check the coolant level only after the engine has been stopped and the fill cap on the expansion tank is cool enough to touch with your bare hand. Remove the fill cap slowly to relieve pressure. Cooling system conditioner contains alkali. Avoid contact with skin and eyes to prevent personal injury.
1. Drain the level of the coolant below the water temperature sensor. Drain the coolant into a suitable container for disposal. 2. Disconnect wire connector (1).3. Remove water temperature sensor (2). The following steps are for the installation of the water temperature sensor.4. Install water temperature sensor (2).5. Connect wire connector (1).6. Fill the cooling system with coolant to the correct level. See the Operation & Maintenance Manual for the correct filling procedure.