Compressed natural gas (CNG) fuel systems require different maintenance than conventional fuel systems. Many industries have converted their fleet vehicles to run on safe, cleaner-burning natural gas. Fleets of trucks, buses and cars owned & operated by cities, governments, school districts, refuse collection companies and a host of other private operations are now running on Compressed Natural Gas (CNG).
Technicians should regularly inspect and replace the fuel filter, which removes any oil or contaminants in the CNG. This filter generally needs to be replaced annually by a qualified service facility; owners should check their owner’s manual for the specific requirements of their vehicle. In some cases filters should be drained of any contaminants on a more regular basis, depending upon the application.
A qualified inspector will note cuts, cracks, gouges, abrasions, discoloration, broken fibers, loose brackets, damaged gaskets or isolators, heat damage or other problems and recommend proper action to assure fuel system safety.
CNG cylinders and fuel systems powering natural gas vehicles must be visually inspected for external damage and deterioration at least every 36 months or 36,000 miles, after a motor vehicle accident, or at the time of reinstallation. EGP company’s CNG Fuel System Inspector Certification was developed to meet the needs of the natural gas vehicle market.