5-8 Refueling CNG Tanks
Refueling CNG Tanks
Contents of the CNG tank are under extreme pressure.
When refueling be very cautious. Make sure there is NO
SMOKING, NO OPEN FLAMES. Make sure engine is turned
off. CNG IS A HIGHLY FLAMMABLE GAS.
When refueling a CNG (compressed natural gas) system, follow
these basic rules:
• Make sure you know and understand the proper procedure for
filling a CNG fuel system.
• If you have any questions on refilling CNG tanks, please ask
your supervisor.
• Refuel only in well ventilated areas.
• Make sure you refill your truck in an approved CNG fueling sta-
tion.
• Apply the parking brake and turn the ignition switch to the OFF
position.
• Checks for leaks.
• Never allow open flames.
Refueling Procedure: Your truck is equipped with a standard fill
block. The fueling station has a standard fuel probe with a shut-off
valve. Your truck and fueling station may be equipped with optional
fueling adaptors. Make sure that you understand how to use them. If
you have any questions, please ask your supervisor. For proper
fueling procedures, follow the steps below.
Before refueling your CNG truck, examine the fueling
probe and make sure the O-rings are not damaged or
missing.
Follow these basic steps:
1. Remove the dust cover.
2. Insert the fuel probe into the fuel fill block. Make sure it is
inserted all the way.
3. Slowly turn the valve to the full open position.
4. When the tank reaches full, the fueling station automatically
shuts off. Your pressure gauge will read about 3600 psi. This is
the maximum operating pressure.
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