Half/Pack
®
Issued April 2018
Compressed Natural Gas (CNG) Option
Copyright 2018, Heil Environmental
Printed in the U.S.A.
Compressed Natural Gas (CNG) Option
200
DETAILED CNG FUEL SYSTEM INSPECTION (CONTINUED)
Figure 46. Inside Tailgate Surface
4. Make sure cylinders mounts are secure. Check mounts and all fasteners.
5. Verify cylinder labels are in place and for each cylinder, make sure cylinder service life has not expired.
6. Inspect cylinder valves and PRDs for leaks and damage.
7. Inspect all plumbing tubes, hoses and fuel flow components for leaks. A CNG Gas Leak Detector is recommended.
8. Examine all cylinders for damage using the cylinder manufacturer’s guidelines. Inspection records should be kept
with vehicle records, and the system label should be updated to reflect the current inspection status.
9. Check condition of tailgate to body hose connection and guards.
If all items pass inspection, the vehicle is cleared for operation. If any issues are identified, a qualified CNG System
Technician should make the necessary repairs.
Remember, the above applies to CNG fuel system inspections, not service intervals to the maintenance items, such as
fuel filters.
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