311 F LRR JFT Caterpillar EXCAVATOR Oil-water Separator and Fuel Filter Installation


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Please ensure that all adjustments and repairs made to the fuel system are performed by properly trained authorized personnel.

Before starting any work on the fuel system, refer to the Operation and Maintenance Manual, "General Hazard Information and High Pressure Fuel Line" for safety information.

For details related to the cleanliness standards that must be followed during all fuel system operations, see System Operation, Testing and Adjustment, "Fuel System Parts Cleaning".


1. Ensure that the fuel filter base is clean and free from damage. If necessary, replace the entire fuel filter base and filter assembly.





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2. If necessary, follow steps 2.a to steps 2.i to assemble the fuel crude filter (1).

a. Install the new filter element to the fuel filter tank (16). For correct steps, refer to the operation and maintenance manual, "Fuel system crude filter (oil-water separator) filter-Replace".


b. Remove the cover from the connector (1). Install the new O-ring seal (10) onto the connector (1).

c. Remove the screw plug from the fuel oil filter (4). Install the connector (1) to the fuel oil filter (4). Tighten the connector to a torque of 20 N-m (177 lbin).

d. Remove the cover from the connector (2). Install the new O-ring seal (13) onto the connector (2).

e. Remove the screw plug from the fuel oil filter (4). Install the connector (2) to the fuel oil filter (4). Tighten the connector to a torque of 20 N·m (1771b in)

f. Install the new O-ring seal (13) onto the screw plug (12). Install the plug (12) to the fuel crude filter (4). Tighten the plug to a torque of 20N-m (177 lb in).

g. Install the new O-ring seal (14) to the screw plug (15). Install the plug (15) to the fuel crude filter (4). Tighten the plug to a torque of 20 N·m (177 lbin).

h. Remove the cover from the vent screw assembly (7). Install the new O-ring seal (8) into the vent screw assembly


i. Install the new O-ring seal (17) on the fuel water content sensor (5). Install the fuel water content sensor (5) on the fuel crude filter (4). Tighten the fuel water sensor (5).





3. Position the fuel oil filter assembly (4) to the mounting bracket.


4. Install the bolts (3) (not shown) on the fuel crude filter assembly (4). Tighten the bolts to a torque of 50 N-m (37 1 bft) c


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Ensure the plastic tube assembly are installed in their original position. Failure to connect the plastic tube assembly to the correct port will allow pollutants to enter the fuel system. If the contaminated fuel enters the fuel system, it will cause serious damage to the engine.


5. Remove the screw plug from the plastic pipe assembly. Remove the cover from the connector (1) of the fuel oil filter (4). Connect the plastic pipe assembly to the connector (1) of the fuel crude filter (4).

6. Remove the screw plug from the plastic pipe assembly. Remove the cover from the connector (2) of the fuel oil filter (4). Connect the plastic pipe assembly to the connector (2) of the fuel crude filter (4).

7. Connect the OEM wiring harness assembly (6) to the fuel water content sensor (5).

8. Turn the fuel supply to the on position.
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9. Turn the battery break switch to the on position.

End By: Remove the air from the fuel system. Refer to the Operation and Maintenance Manual, "Fuel System-Charge" for correct steps