Cummins ISX11.9 CM2250 – Service Manual 006-065   Pressure Fuel Filter

The fuel system requires the use of two fuel filters. The suction side filter must have the following characteristics:

• Water-separating
• 10-micron rating
• Water-in-fuel sensor with shunt resistor
• Water drain valve
• Engine or chassis mounted.

The pressure side filter must have the following characteristics:

• 5-micron rating
• Engine mounted.

Use the following procedure in the Operation and Maintenance Manual, ISX11.9 CM2250, Bulletin 2883444, for fuel filter recommendations. Refer to Procedure 018-024 in Section V.

WARNING  When using a steam cleaner, wear safety glasses or a face shield, as well as protective clothing. Hot steam can cause serious personal injury.

WARNING  Wear appropriate eye and face protection when using compressed air. Flying debris and dirt can cause personal injury.

CAUTION  Clean all fittings before disassembly. Dirt or contaminants can damage the fuel system.

Before servicing any fuel system components, (such as fuel lines, fuel pump, injectors, etc.), which would expose the fuel system or internal engine components to potential contaminants prior to disassembly, clean the fittings, mounting hardware, and the area around the component to be removed. Dirt or contaminants can be introduced into the fuel system and engine if the surrounding areas are not cleaned, resulting in damage to the fuel system and engine. Refer to Procedure 000-009 in Section 0.

Clean the fuel filter head with contact cleaner, Part Number 3824510 or equivalent.

To prevent damage from debris and contamination, cover, cap, or plug any openings as soon as possible when servicing the fuel system.  Caps and plugs can be found in Clean Care Kit, Part Number 4919073.

WARNING  Batteries can emit explosive gases. To reduce the possibility of personal injury, always ventilate the compartment before servicing the batteries. To reduce the possibility of arcing, remove the negative (-) battery cable first and attach the negative (-) battery cable last.

• Disconnect the batteries. Refer to the OEM service manual.

WARNING  Depending on the circumstance, diesel fuel is flammable. When inspecting or performing service or repairs on the fuel system, to reduce the possibility of fire and resulting severe personal injury, death, or property damage, never smoke or allow sparks or flames (such as pilot lights, electrical switches, or welding equipment) in the work area.

Remove the fuel filter with filter wrench, Part Number 3400157.

Make sure the seal ring does not stick to the filter head.

Remove the ring with an o-ring pick, if necessary.

Use the correct filter(s) for your engine. Filters must remove a minimum of 98.7 percent of free and emulsified water. They must also have a 5-micron particle-removal efficiency.

Use the following procedure in the Operation and Maintenance Manual, ISX11.9 CM2250, Bulletin 2883444, for fuel filter recommendations. Refer to Procedure 018-024 in Section V.

Apply a thin coating of clean engine oil to the filter gasket surface.

NOTE: Cummins® Fleetguard® filters come equipped with a disposable insert that will prevent fuel from entering the clean side of the filter media during pre-filling.

NOTE: If the engine is not equipped with a lift pump, the fuel filter will have to be properly filled before installation. Refer to Procedure 005-234 in Section 5.

CAUTION  Mechanical overtightening of the filter can distort the threads or damage the filter element seal.

NOTE: Engines equipped with priming pumps do not require the fuel filter to be filled prior to installation, if the following filling procedure is followed.

Install the filter onto the filter head. Turn the filter until the gasket contacts the filter head surface.

Tighten the filter an additional ¾ of a turn after the gasket contacts the filter head surface, or as specified by the filter manufacturer.

Prime the fuel system. Refer to Procedure 005-234 in Section 5.

WARNING  Batteries can emit explosive gases. To reduce the possibility of personal injury, always ventilate the compartment before servicing the batteries. To reduce the possibility of arcing, remove the negative (-) battery cable first and attach the negative (-) battery cable last.

• Connect the batteries. Refer to the OEM service manual.
• Operate the engine and check for leaks.