HOSE AS 3973830 - Caterpillar

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.
Do not allow dirt to enter the fuel system. Thoroughly clean the area around a fuel system component that will be disconnected. Fit a suitable cover over disconnected fuel system component.
Note: Refer to Operation and Maintenance Manual, "Access Doors and Covers" for a guide for the locations of access doors and covers on this machine.
Open the engine access doors and open the left side access door for the hydraulic cooler compartment.
Illustration 1 g00783864
Turn the fuel supply valves to the OFF position before you perform this maintenance. Place a tray under the fuel filter in order to catch any fuel that might spill. Clean up any spilled fuel immediately.
Illustration 2 g00574367
Clean the outside of the fuel filter assembly. Open the drain on the bottom of the fuel filter. Drain the fuel and the water from the element into a suitable container.Note: If the element is not equipped with a drain, remove cap (1). Remove the nylon insert in order to reduce the level of fuel in the element. A reduction in the level of fuel in the element will help prevent fuel from being spilled when the element is removed.
Do not use a tool in order to remove the fuel filter. Attempting to remove the fuel filter with a filter wrench or a filter strap could damage the locking ring.
Hold the element and rotate locking ring (2) counterclockwise. Remove locking ring (2). The used element should be removed and discarded.Note: If the element is equipped with a sediment bowl, remove the sediment bowl from the element. Thoroughly clean the sediment bowl. Inspect the O-ring seals. Install new O-ring seals, if necessary. Install the sediment bowl to the new element. Hand tighten the sediment bowl. Hand tightening is the only method that should be used.
Do not fill fuel filters with fuel before installing them. Contaminated fuel will cause accelerated wear to fuel system parts.
Ensure that the filter head is clean. Push a new element fully into the filter head.
Hold the element in place. Fit locking ring (2) into position. Rotate the locking ring clockwise in order to fasten the element to the filter head.Note: If the nylon insert was removed, install the nylon insert and install cap (1) .
Prime the fuel system. Refer to the Maintenance Section for more information.
Close the engine access doors and close the left side compartment access door for the hydraulic cooler.