Ram Trucks 2012 3500 - CNG Supplement - Manual (Page 9)

• Unlike gasoline, a compressed natural gas fuel system
is under pressure even when the engine is not running.
To avoid risk of personal injury, any repair to the fuel
system should be performed by a qualified technician.
• Natural gas vapors at atmospheric pressure are lighter
than air and will rise and disperse in open areas. In
enclosed areas, natural gas vapor may collect and form
a combustible mixture. If the vehicle is routinely
placed in an enclosed area, the area should be pro-
vided with adequate ventilation and/or a natural gas
detection system. For long term storage, the manual
shutoff valve and individual container valves should
be closed.
• When a vehicle is involved in an accident which has or
may have caused damage to the natural gas fuel
system, the system must be inspected and pressure
tested by a qualified technician before returning the
vehicle to service.
• Any fuel system component, including the containers,
that has been subjected to fire may not be returned to
service due to reduced pressure capability.
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THINGS TO KNOW BEFORE STARTING YOUR VEHICLE 7