O-RING KIT 4C4784 - 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 any disconnected fuel system components.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Dispose of all fluids according to local regulations and mandates.
Note: The primary filter element must be replaced at the same time as the secondary filter element. Refer to Operation and Maintenance Manual, "Fuel System Primary Filter (Water Separator) Element - Replace".Fuel Filter with Element
Close the fuel supply valve (1).
Illustration 1 g01334893
Typical example
Clean the outside of the fuel filter assembly.
Loosen the locking ring (2).
Remove the casing (3) for the filter and the element. Ensure that any fluid is drained into a suitable container.
Illustration 2 g01334895
Typical example
Note: Do not fill the fuel filter with fuel. The fuel will not be filtered and the fuel could be contaminated. Contaminated fuel can damage your fuel system.
Assemble the following items: seal (5), filter element, (6) and casing (3).
Install the assembled items to the filter base (4).
Install the locking ring (2) to the filter head. Rotate the locking ring to lock the assembly.The fuel system will need to be primed after the new filter is installed. Refer to Operation and Maintenance Manual, "Fuel System - Prime".