C4.4 Engines for Caterpillar Built Machines Caterpillar

Specifications

Removal Procedure

1. Drain the coolant from the cooling system to a level below the coolant temperature sensor. Refer to Operation and Maintenance Manual, "Cooling System Coolant - Change" for the correct draining procedure.

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Illustration 1	g02439656

2. Slide locking tab (2) into the unlocked position. Disconnect harness assembly (3) from coolant temperature sensor (1) .

3. Use a deep socket in order to remove coolant temperature sensor (1) from the cylinder head.

4. Remove O-ring seal (4) from coolant temperature sensor (1) .

Installation Procedure

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Illustration 2	g02439656

1. Install a new O-ring seal (4) onto coolant temperature sensor (1).

   Note: Do not lubricate the O-ring seal.

2. Use a deep socket in order to install coolant temperature sensor (1) to the cylinder head. Tighten the coolant temperature sensor to a torque of 20 N·m (177 lb in).

3. Connect harness assembly (3) to coolant temperature sensor (1). Slide locking tab (2) into the locked position.

4. Fill the cooling system to the correct level. Refer to Operation and Maintenance Manual, "Cooling System Coolant Level - Check" and refer to Operation and Maintenance Manual, "Cooling System Coolant - Test/Add" for the correct filling procedure.