CYLINDER ASSEM. 4J4848 - Caterpillar

Single Fuel Filter
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 System Operation/Testing and Adjusting Manual , "Cleanliness of Fuel System Components" for detailed information on the standards of cleanliness that must be observed during ALL work on the fuel system.
Ensure that the engine is stopped before any servicing or repair is performed.
After the engine has stopped, wait for 60 seconds in order to allow the fuel pressure to be purged from the high-pressure fuel lines before any service or repair is performed on the engine fuel lines. If necessary, perform minor adjustments. Repair any leaks from the low-pressure fuel system and from the cooling, lubrication, or air systems. Replace any high-pressure fuel line that has leaked. Refer to Disassembly and assembly Manual, "Fuel Injection Lines - Install".Ensure that all adjustments, maintenance, and repairs are performed by authorized personnel that have the correct training.
Illustration 1 g03393240
(1) Fuel filter base (single filter)
(2) O' ring seal
(3) Primary fuel filter canister
(4) Drain valve
The engine can auto start. Ensure that the power supply is isolated before any service or repair is performed.
Turn the fuel supply valve to the OFF position before performing this maintenance.
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.Refer to Special Publication, NENG2500, "Cat Dealer Service Tool Catalog" or refer to Special Publication, PECJ0003, "Cat Shop Supplies and Tools Catalog" for tools and supplies suitable to collect and contain fluids on Cat products.Dispose of all fluids according to local regulations and mandates.
Place a suitable container under the water separator to catch any fuel that might spill. Clean up any spilled fuel. Clean the outside of the water separator.
Place a soft cloth over the vent screw on the filter. Open the vent screw in order to relieve the pressure that may be within the fuel system.
Open the drain valve. Allow the fluid to drain into the container. Tighten the drain valve by hand pressure only. Then, tighten the vent screw securely.
Use 1U-8760 Chain Wrench in order to remove the fuel filter canister .
Lubricate O' ring seal with clean engine oil on the new canister.
Spin on the canister until the O' ring seal contacts the sealing surface. Then rotate the canister 270 degrees. Do not use a tool in order to install the canister.
Open the fuel supply valve. Remove the container and dispose of the fluid in a safe place.
The secondary filter must be replaced at the same time as the primary filter. Perform the priming procedure. Refer to this Operation and Maintenance Manual , "Fuel System - Prime". Duplex Fuel Filters
Some engines are installed with duplex fuel filters. Filter Change with the Engine in Operation
Illustration 2 g01627770
(A) The fuel