Fill Valve Replacement

FILL VALVE REPLACEMENT

TOOLS REQUIRED
J 45878 Combustible Gas Detector

REMOVAL PROCEDURE
1. Relieve the fuel system pressure. Refer to Fuel Pressure Relief Procedure.
2. Disconnect the negative battery cable.

CAUTION: Refer to Battery Disconnect Caution in Service Precautions.

3. Raise and support the vehicle. Refer to Vehicle Lifting in the C/K Pickup service data. Remove the truck body or side panel as required on ZW9 equipped vehicles in order to gain access to the fill valve.




4. Disconnect the fill line (3) at the fill valve (2).




5. Remove the bolts (4) from the mounting plate (2).




6. Remove the fill valve mounting nut (3).
7. Remove the fill valve (2) from the vehicle.

INSTALLATION PROCEDURE




1. Install the fill valve (2) into the mounting plate (1).
2. Install the fill valve nut (3).

NOTE: Refer to Fastener Notice in Service Precautions.

Tighten the nut to 41 N.m (30 lb ft).




3. Install the mounting plate (2) to the fill housing with the attaching bolts (4).

Tighten the bolts to 8 N.m (71 lb in).




4. Connect the fill line (3) to the fill valve (2) with a new O-ring face seal. Lubricate the O-ring with petroleum jelly.

Tighten the fitting to 37 N.m (27 lb ft).

5. Install the negative battery cable.

CAUTION: Refer to Battery Disconnect Caution in Service Precautions.

6. Start the vehicle and inspect for CNG fuel leaks at the serviced fitting using the J 45878 or an equivalent liquid leak detector.