C4.4 Industrial Engine Caterpillar

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Fuel leaked or spilled onto hot surfaces or electrical components can cause a fire. To help prevent possible injury, turn the start switch off when changing fuel filters or water separator elements. Clean up fuel spills immediately.

Note: Refer to Systems Operation, Testing, and Adjusting, "Cleanliness of Fuel System Components" for detailed information on the standards of cleanliness that must be observed during ALL work on the fuel system.

Remove the Element

1. Turn the fuel supply valve (if equipped) to the OFF position before performing this maintenance.

2. Place a suitable container under the water separator in order to catch any fuel that might spill. Clean up any spilled fuel. Clean the outside body of the filter assembly.
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   Illustration 1	g03132696
   Typical example

3. Install a suitable tube onto drain (3). Open the drain valve (2). Rotate the drain valve counterclockwise. Two full turns are required.

4. Loosen the vent screw (1).

5. Allow the fuel to drain into the container. Remove the tube from the drain valve.

6. Tighten the vent screw (1) securely . Remove the wiring harness from connection (4).

7. Rotate filter bowl (6) counterclockwise and remove the filter bowl from assembly. Refer to your caterpillar dealer for the correct tool.
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   Illustration 2	g02148402
   Typical example

8. Rotate the filter element (5) counterclockwise and remove the filter element . Clean the filter bowl.

Install the New Filter Element

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Illustration 3	g03132717
Typical example

1. Locate the thread in the new filter element (8) onto the threads (9). Spin on the filter element and tighten the drain valve (2) securely.

2. Lubricate the O ring seal (7) with clean engine oil. Do NOT fill the bowl with fuel before the assembly is installed.

3. Do not use a tool in order to install the filter assembly. Tighten the filter bowl (6) by hand. Install the filter bowl (6). Turn the filter bowl clockwise until the filter bowl locks into position against the stops.

4. Remove the container and dispose of the fuel in a safe place.

5. The secondary filter element must be replaced at the same time as the primary filter element. Refer to the Operation and Maintenance Manual, "Fuel System Secondary Filter - Replace".