Ford produces a Super Duty Cutaway/Chassis Cab Dedicated Natural Gas Vehicle (NGV), which comes from the factory capable of running on Compressed
Natural Gas (CNG).
The vehicle is equipped with a 3-tank CNG fuel system,
which consists of one midship tank and two aft-of-axle
When installing a Second Unit Body (SUB), the
precautions and instructions as described on these
pages must be followed.
•The body shall provide adequate strength and anti-
deformation characteristics to withstand NGV-1
breakaway force from the fill station with no vehicle
fuel system leakage.
Definition of a Dedicated NGV: Vehicle operates on
CNG fuel only, no gasoline on board. The engine has upgraded components or enhanced durability while
operating on the gaseous fuel.
•Removing, detaching or altering any component of
the CNG fuel system should only be done by an
authorized Ford Dealer, properly Ford trained
personnel or OEM fuel system installer.
•Do not weld on CNG tanks or attachment brackets.
•If it is necessary to place the vehicle in a paint-
curing oven to cure paint on a SUB, all the fuel from
the CNG system (tanks, lines, etc.) must be
removed prior to curing. The vehicle and it’s
components should not be subjected to
temperatures in excess of 180 ambient degrees F.
•Do not pressurize the fuel system with anything but
nitrogen or natural gas.
The vehicle must adhere to the same requirements and
criteria as the gasoline E-450 Cutaway/Chassis Cab
unless otherwise stated in the E-450 Cutaway/Chassis
Cab NGV portion of this publication.
A minimum of 25.4 mm [1.0 in] clearance is required
between any part of the fuel system and the
surrounding components.
Installation of Ford supplied in-body tank kit:
•Any tanks that are added by the SUB installer must
utilize the inertia switch and have a solenoid
activated tank valve.
•Underbody or cargo area tanks must be shielded.
Shields must have drain holes.
•If tanks are mounted inside the vehicle, the tank
neck and all connections must be enclosed in a gas
tight housing and be vented outside the vehicle.
The subsequent stage manufacturer is responsible for
ensuring that all applicable requirements are met,
including Federal/Canadian Motor Vehicle Safety
Standards (F/CMVSS) regulations. The completed
vehicles must be in accordance with all federal, state,
provincial and local regulations and industry standards
regarding new vehicles including, but not limited to,
those issued by:
•Ford Truck Body Builders Layout Book
•Ford Incomplete Vehicle Manual (IVM)
•Ford Truck Quality Program Guidelines
Do not assume that this is a complete list but
rather a sample of the many resources that
contain the requirements that your vehicle must
meet once it is complete.


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