Issued June 2020
Compressed Natural Gas (CNG) Option
Copyright 2020, Heil Environmental
Printed in U.S.A.
219
FUELING PROCEDURE (CONTINUED)
3. Type 3:
To utilize this hose:
a. Locate fill receptacle and remove dust cap.
b. Holding firmly, press nozzle onto fill receptacle.
c. Rotate lever clockwise 180° to begin fueling.
d. When fueling is complete, rotate lever
counterclockwise 180° to allow fuel hose
disconnection.
Figure 61. Type 3 Fueling Hose
TRANSFER FUELING (DEFUELING)
PROCEDURES
Defueling is generally the process of removing any residual
fuel from the fuel tanks and on-board fuel delivery system
prior to performing any welding or a major repair.
WARNING
Never weld on a compressed natural gas vehicle unless
the compressed natural gas fuel system has been purged
with inert gas.
Capturing the CNG in a system that can send it back to a
CNG fueling station storage facility for reuse is the most
environmentally responsible method. Atmospheric venting
of CNG might be illegal and against local environmental
regulations for your area. Check local laws and regulations
before venting CNG to the atmosphere.
Before attempting to defuel a CNG vehicle, read and
understand National Fire Protection Association (NFPA)
52 sections 6.14.1 - 6.14.4.4 as they provide a detailed list
of requirements to be followed when performing defueling.
Also read and understand all of the safety alert messages
and procedures in the Momentum or Agility CNG Fuel
System Operation and Maintenance Manual and the
Agility (or equipped fuel cylinder manufacturer) CNG
Fuel Cylinder Inspection Manual.
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