Removal Procedure
- Relieve the compressed natural gas (CNG) fuel system pressure. Refer to Compressed Natural Gas Fuel Pressure Relief (With CH-48027) .
- Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
- Raise the vehicle. Refer to Lifting and Jacking the Vehicle .
- Remove the mid ship tank cover. Refer to Compressed Natural Gas Tank Cover Replacement - Midship Tank .
- Close the red 1/4 turn valve at the high pressure regulator (HPR).
- Carefully loosen and disconnect the high pressure line to the HPR to relieve residual pressure.
- Disconnect the low pressure line fitting at the HPR outlet.
- Disconnect the electrical connections.
- Remove the HPR assembly bracket nuts and washers.
- Install coolant hose pinch-off tool to coolant lines and place a drain pan under the HPR assembly.
- Mark and remove coolant lines.
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.