Compressed Natural Gas Fuel Feed Pipe Tee Replacement

Compressed Natural Gas Fuel Feed Pipe Tee Replacement

Special Tools

J-45878 - Combustible Gas Detector

For equivalent regional tools, refer to Special Tools Tools and Equipment.

Removal Procedure

Warning

Natural gas is highly flammable. In order to reduce the risk of fire and personal injury, keep sparks, flames, and smoking materials away from the vehicle while you perform the Compressed Natural Gas (CNG) fuel system service.

Warning

The Compressed Natural Gas (CNG) system operates at pressures up to 24820 kpa (3600 psi). Relieve the CNG fuel system pressure before servicing CNG fuel system components in order to reduce the risk of fire and personal injury.

1. Relieve the compressed natural gas (CNG) fuel system pressure. Refer to Compressed Natural Gas Fuel Pressure Relief (With CH-48027) Service and Repair.

2. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection Battery Negative Cable Disconnection and Connection.

3. Raise the vehicle. Refer to Lifting and Jacking the Vehicle Service and Repair.

4. Remove the mid ship tank cover. Refer to Compressed Natural Gas Tank Cover Replacement - Midship Tank Compressed Natural Gas Tank Cover Replacement - Midship Tank.





5. Disconnect the fuel line fittings at the tee.

6. Remove the fuel line tee from the vehicle.

Installation Procedure





Caution:
Refer to Component Fastener Tightening Caution Component Fastener Tightening Caution.

1. Connect the CNG fuel lines to the tee fitting using New O-rings. Lubricate New O-rings with petroleum jelly or equivalent before installation. Tighten the fuel line fitting to 35 Nm (26 lb ft).

2. Open all manual shut-off valves to each fuel tanks.

3. Install ALL the tank cover. Refer to Compressed Natural Gas Tank Cover Replacement - Aft Tank Compressed Natural Gas Tank Cover Replacement - Aft Tank , Compressed Natural Gas Tank Cover Replacement - Cargo Tank Compressed Natural Gas Tank Cover Replacement - Cargo Tank and Compressed Natural Gas Tank Cover Replacement - Midship Tank Compressed Natural Gas Tank Cover Replacement - Midship Tank.

4. Install the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection Battery Negative Cable Disconnection and Connection.

5. Start the vehicle and inspect for CNG fuel leaks at the serviced fittings with the J-45878 - detectoror an equivalent leak detector.