Fill Line Union (Check Valve): Installation
WARNING: This page is about a different car, the 2003 GMC Sierra and 2003 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
Natural gas is stored under high pressure. If a leak occurs, the high pressure could cause a personal injury. In order to prevent Compressed Natural Gas (CNG) fuel leaks, always replace the CNG fuel system "O" rings during service.
- Connect the fuel fill line to the check valve with a NEW "O" ring face seal. Lubricate the "O" ring face seal with petroleum jelly. Tighten the fitting to specification. See TORQUE SPECIFICATIONS .
- Connect the fuel fill hose to the check valve with a NEW "O" ring face seal. Lubricate the "O" ring face seal with petroleum jelly. Tighten the fitting to specification. Install the negative battery cable(s). Tighten cable bolt(s) to specification.
- Start the vehicle and inspect for CNG fuel leaks at the serviced fittings using Combustible Gas Detector. Install the truck body as required on ZW9 equipped vehicles.
WARNING:
Natural gas is stored under high pressure. If a leak occurs, the high pressure could cause a personal injury. In order to prevent Compressed Natural Gas (CNG) fuel leaks, always replace the CNG fuel system "O" rings during service.
- Connect the fuel fill line check valve to the tee using a new "O" ring. Lubricate the "O" ring with petroleum jelly. Tighten the fitting to specification. See TORQUE SPECIFICATIONS . Connect the fuel fill line to the check valve using a NEW "O" ring. Lubricate the "O" ring with petroleum jelly. Tighten the fitting to specification.
- Install the negative battery cable(s). Tighten cable bolt(s) to specification. Start the vehicle and inspect for CNG fuel leaks at the serviced fittings using Combustible Gas Detector. Install the tank cover. See FUEL TANK COVER .