Low-Pressure Fuel Lines

LOW-PRESSURE FUEL LINES

Spring Lock Coupling Disconnect Tool:

SPECIAL TOOL(S)

REMOVAL

WARNING:
- The fuel system will remain pressurized after engine shutdown. This pressure must be relieved before servicing any part of the fuel system, or personal injury or property damage can result.
- Eye protection is required when removing or installing fuel system components to avoid possible injury.

NOTE:
- Install new fuel system O-ring seals using approved O-ring seals only. O-ring seals that are approved for natural gas use are identified with a yellow stripe.
- Lubricate the fuel system O-ring seals with clean engine oil prior to installation to help seal and ease the installation.
- When tightening the fuel tubes, a torque wrench adapter must be used with the torque wrench. The use of a torque wrench adapter will alter the effective torque of the torque wrench being used. To correct the effective torque, a torque multiplication conversion must be used.
- After installation is complete, carry out the Fuel System Leak Test procedure. Leak Test

1. Carry out the Fuel System Pressure Release procedure.
2. Disconnect the battery ground cable.
3. Disconnect the fuel tube spring lock coupling from the engine fuel supply manifold.
4. Raise the vehicle.
5. On dual exhaust systems, remove the LH dual catalytic converter.







6. Remove the bolts and remove the pressure regulator shield.







7. Remove the low pressure fuel tube fitting from the pressure regulator outlet fitting.







8. Remove the fuel line retaining bolts.







9. Remove the fuel tube retaining bolt at the frame rail near the engine compartment. Remove the fuel tube.

INSTALLATION
1. To install, reverse the removal procedure.
2. Pressurize the fuel system.
1 Turn the jackscrews counterclockwise until resistance is felt.
2 Turn the ignition key to the RUN position.