freightliner cascadia Driver Manual page 222

IMPORTANT: Close all windows and doors dur-
ing the fueling process. Keeping windows and
doors closed allows for easier leak detection
inside the cab after fueling.
NOTE: If the fuel system has only back of cab
tanks, the fuel fill is located behind the fuel ac-
cess panel on the lower part of the cabinet, or
below the tank cabinet in a separate box. If
truck has saddle mount tanks, the fuel panel is
located on the back end of the left side tank.
Vehicles with back-of-cab cabinets and saddle
tanks are have the fuel fill panel on the back
end of the left side tank. See
tanks, or Fig. 25.3 for back-of-cab cabinet
mounted fuel panel.
WARNING
Natural gas fuel tanks, lines, and valves are al-
ways pressurized. Always observe safety precau-
tions. Failure to do so could lead to loss of con-
trol over a filling hose or to ignition of the natural
gas, which could cause serious bodily injury,
death, or severe property damage.
2. Ensure all fuel cylinder shutoff valves are open.
See Fig. 25.2.
3. Ensure the vehicle fuel system main shutoff
valve is open.
4.
If equipped, open the CNG fuel panel access
door and remove the dust cap from the vehicle
fuel fill port.
5. Ensure the O-ring is present inside the fuel fill
port. If the O-ring has been dislodged or is miss-
ing, the station dispensing nozzle will not con-
nect securely to the fill port.
6. Turn the selector knob on the service pump to
the VENT position, if equipped.
7. Connect the quick coupling on the dispensing
nozzle securely to the vehicle fuel fill port.
8.
Turn the selector knob on the service pump to
the FILL position, if equipped.
IMPORTANT: If at any time the service pump or
vehicle begins to vent CNG uncontrollably, notify
a station attendant or activate the service sta-
Fig. 25.2 for side
Natural Gas Vehicles
2
1
01/21/2014
1. High-Pressure Gauge
2. Fuel Cylinder Information Sticker
3. Manual Shutoff Valve
4. Fuel Fill Port
Fig. 25.2, CNG Fuel Cylinder Fill Panel (side tank
REGULATOR
INSPECT PRESSURE
RELIEF DEVICE
EVERY 2000 MILES
FILTER
DRAIN HOUSING
EVERY 1500 MILES
3600 PSIG MAX.
REPLACE ELEMENT
SERVICE PRESSURE
EVERY 3000 MILES
04/30/2010
1. High Pressure Gauge
2. Low Pressure Gauge
3. Manual Fuel Shutoff Valve
4. Fuel Fill Port and Dust Cap
Fig. 25.3, CNG Under Cabinet Fuel Panel (under
cabinet shown)
tion emergency shut-off switch to cease the flow
of CNG.
3
4
shown)
2
1
CYLINDERS
INSPECT CYLINDERS
EVERY 36 MONTHS
OR 36000 MILES
WHICHEVER OCCURS FIRST
NATURAL
GAS
VEHICLE
110 PSIG
OPEN VALVE
SLOWLY
4
3
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25.4