Cummins ISX11.9 CM2250 – Service Manual 006-066   Fuel Filter Suction

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, ISX15 CM2250, Bulletin 2883361, for fuel filter recommendations. Refer to Procedure 018-024 in Section V.

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  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.

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

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.

Refer to the OEM service manual for information regarding the removal of the suction side fuel filter.

NOTE: Suction side fuel filters are OEM supplied. Refer to the OEM service manual for appropriate service intervals.

Use the correct filter(s) for your engine. The suction side fuel filter must remove a minimum of 95 percent of free and emulsified water. It must also have a 10-micron particle-removal efficiency.

Refer to the OEM service manual for information regarding proper installation of the suction side fuel filter.

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.
• Prime the fuel system. Refer to Procedure 005-234 in Section 5.
• Operate the engine and check for leaks.