Cummins ISX11.9 CM2250 – Service Manual 019-117   Fuel Pump Actuator

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.

Before servicing any fuel system components, (such as fuel lines, fuel pump, injectors, etc.) which would expose the fuel system or internal engine component 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 pump actuator and surrounding area 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.

Disconnect the fuel pump actuator harness connector.

Measure the fuel pump actuator resistance.

The maximum resistance is 5 ohms.

Remove the capscrews and fuel pump actuator.

Lubricate the o-ring with clean oil before installation.

Press the fuel pump actuator into the fuel pump housing fully, use a slight twisting motion. Do this before starting the capscrews.

NOTE: Fully installing the fuel pump actuator prior to starting the capscrews reduces the risk of side loading the plunger and reduced component life.

NOTE: Make sure the fuel pump actuator flange is flush with the mounting surface on the fuel pump before tightening the capscrews.

Install and tighten the capscrews.

• Connect the fuel pump actuator harness connector.
• Operate the engine and check for leaks.