Depressurizing CNG Systems

1. Ensure that the vehicle is turned off.
2. Turn all cylinder shutoff valves one on each cylinder clockwise to the OFF CLOSED position.
3. Ensure that the manual shut off valve is in the ON OPEN position.
4. Turn on the vehicle and run the engine until it stops.
5. Ensure that the vehicle is off and that the proper vehicle lock out procedures are followed. Remove the ignition key.
6. Check the gauges on the fill panel to ensure that all the pressure is relieved.
7. Remove the access cover on the rear of the fill panel optional.
8. Relieve the remaining pressure by slowly opening the bleed valve as shown below.