C6.6 Industrial Engine Fuel Manifold (Rail) - Remove and Install Caterpillar


Fuel Manifold (Rail) - Remove and Install
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1.1. Removal Procedure
2.1. Installation Procedure

Removal Procedure

Table 1
Required Tools 
Tool  Part Number  Part Description  Qty 
370-8376  Cap Kit 

Start By:

  1. Remove the inlet air control (NRS Induction Mixer) and mounting bracket. Refer to Disassembly and Assembly, "Inlet Air Control (NRS Induction Mixer) - Remove" for the correct procedure.

  2. Remove the fuel injection lines. Refer to Disassembly and Assembly, "Fuel Injection Lines - Remove" for the correct procedure.

------ WARNING! ------

Contact with high pressure fuel may cause fluid penetration and burn hazards. High pressure fuel spray may cause a fire hazard. Failure to follow these inspection, maintenance and service instructions may cause personal injury or death.



NOTICE

Ensure that all adjustments and repairs that are carried out to the fuel system are performed by authorized personnel that have the correct training.

Before beginning ANY work on the fuel system, refer to Operation and Maintenance Manual, "General Hazard Information and High Pressure Fuel Lines" for safety information.

Refer to System Operation, Testing and Adjusting, "Cleanliness of Fuel System Components" for detailed information on the standards of cleanliness that must be observed during ALL work on the fuel system.




    Illustration 1g02178677

  1. Thoroughly clean the area around fuel manifold (4).

  2. Disconnect harness assembly (6) from fuel pressure sensor (5).

  3. Disconnect plastic tube assembly (1) from the fuel pressure relief valve on fuel manifold (4). Immediately cap the open port in fuel manifold (4) with a new cap. Immediately plug the open end of plastic tube assembly (1) with a new plug.

  4. Remove bolts (2) and bolts (3). Remove fuel injection line support bracket (7).

  5. Remove fuel manifold (4) from cylinder head.

Installation Procedure


NOTICE

Ensure that all adjustments and repairs that are carried out to the fuel system are performed by authorized personnel that have the correct training.

Before beginning ANY work on the fuel system, refer to Operation and Maintenance Manual, "General Hazard Information and High Pressure Fuel Lines" for safety information.

Refer to System Operation, Testing and Adjusting, "Cleanliness of Fuel System Components" for detailed information on the standards of cleanliness that must be observed during ALL work on the fuel system.


  1. Ensure that all ports on the fuel manifold are capped. Ensure that the fuel manifold is externally clean and free from damage.

    Note: Do not install a fuel manifold that has not been capped. All caps must be left in place until the fuel injection lines or the fuel pressure relief valve are installed.



    Illustration 2g02178677

  2. Position fuel manifold (4) onto the cylinder head. Install bolts (3) to fuel manifold (4) finger tight.

  3. Position fuel injection line support bracket (7) onto the fuel rail. Install remaining bolt (3). Install bolt (2) for injection line support bracket (7) finger tight.

  4. Install a new set of seals and a new set of fuel injection lines. Refer to Disassembly and Assembly, "Fuel Injection Lines - Install" for the correct procedure.

  5. Tighten bolts (3) to a torque of 22 N·m (195 lb in).

  6. Tighten bolts (2) to a torque of 9 N·m (80 lb in).

  7. Remove the plug from plastic tube assembly (1). Connect plastic tube assembly (1) to the fuel pressure relief valve.

  8. Connect harness assembly (6) to fuel pressure sensor (5).

  9. Replace the filters for primary fuel system. Refer to Operation and Maintenance Manual, "Fuel System Primary (Water Separator) Element - Replace" for the correct procedure.

  10. Replace the filters for secondary fuel system. Refer to Operation and Maintenance Manual, "Fuel System Secondary Filter - Replace" for the correct procedure.

  11. Remove the air from the fuel system. Refer to Operation and Maintenance Manual, "Fuel System - Prime" for more information.

End By:

  1. Install the mounting bracket and the inlet air control (NRS Induction Mixer). Refer to Disassembly and Assembly, "Inlet Air Control (NRS Induction Mixer) - Install" for the correct procedure.

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