Fuel System Manual Control Valve (CNG): Service and Repair

Manual Shut-off Valve Replacement

1. Relieve fuel pressure between the engine and the fuel tank.
2. Lift the vehicle, and support it with jackstands.




3. Remove the under-floor cover (A).




4. Disconnect the fuel lines (A).

NOTE: Always use two wrenches when removing or installing the fuel line nuts.

5. Remove the bolt (B) and the manual shut-off valve (C).
6. Apply silicone grease (PARKER CHRISTO-LUBE) to the new O-rings (D) and carefully install them into their proper positions.
7. Install the parts in the reverse order of removal.
8. Do the leak inspection procedure.