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9.
Switch on the service pump. A slight hissing
noise may be heard as the fuel cylinders fill.
10. Watch the pressure gauge on the service pump.
When the gauge reads approximately 3600 psi
(24 800 kPa), or when the fill pressure stops
climbing, the CNG cylinders are full. The service
pump will shut itself down automatically. See
Table 25.1
for pressure compensation values
based on ambient temperatures.
11. Move the selector knob on the service pump to
the VENT position, if equipped. A short hiss will
be heard as a small amount of natural gas is
vented into the hose.
WARNING
Do not attempt to remove the fill station nozzle
from the tank fill fitting until venting of pressure
is noted. If no venting occurs, ask for assistance
from the station attendant. Removing an un-
vented coupling could result in an uncontrolled
hose, which could lead to property damage or
personal injury.
12. Remove the station dispensing nozzle from the
vehicle fill port.
NOTE: Some fill ports and dust caps contain a
magnetic start interrupt sensor to prevent a
truck from being started and driven away with
the fill hose connected. These caps must be
installed correctly or vehicle will not start.
13. Install the dust cap on the vehicle fuel fill port
and close the fuel panel access door, if
equipped.
LNG Vehicle Fueling
Only certified LNG fueling personnel are authorized
to fuel an LNG vehicle.
Natural Gas Detection System
A gas detection system is standard in all Daimler
Trucks natural-gas-fueled vehicles. This system has
a sensor in the engine compartment, one in the cab,
and one in the sleeper (if equipped), all situated in
high areas to detect natural gas buildup as a result
of leaks.
The AMGaDS III Plus is a natural gas detection sys-
tem. This device is meant to serve as a supplemen-
tal warning only. It is not intended to replace stan-
dard safety practices that should be conducted
around flammable gases.
IMPORTANT: To function properly, the gas de-
tection system must be powered at all times.
The gas detection system is directly powered by
the batteries, and can only be powered off by
disconnecting the batteries. When servicing a
natural-gas-fueled vehicle, disconnect the bat-
teries only when necessary, and do not leave
the batteries disconnected for extended periods
of time.
The lower flammability limit (LFL) is the smallest
amount of the gas that supports a flame when mixed
with oxygen and ignited. Zero percent (0%) LFL indi-
cates a gas-free atmosphere. One hundred percent
(100%) LFL indicates that gas concentration has
reached its lower flammability limit (5% gas in air by
volume). The red warning light and audible alarm
located in the overhead console activate when a sen-
sor detects gas fumes in concentrations above 50%
LFL, and should allow ample time to utilize safety
procedures. However, individuals with special needs
should review the system with a professional safety
engineer.
Alarm Procedure
Before operating the vehicle, the driver must be fa-
miliar with the procedures as shown on the interior
sticker on the overhead panel (See
Fig. 25.4
) and
the exterior sticker on the door (See
Fig. 25.5
).
IMPORTANT: If an audible alarm activates, do
not operate any electrical switch, including
lights. Avoid causing sparks and stay away from
arcing switches and equipment. Do not use a
telephone, including cellular phones or any
types of portable communication or electronic
devices that have a battery.
If the vehicle is in motion when the audible alarm
activates, bring it to a safe stop, shut down the en-
gine, and exit the vehicle.
Do not open the hood.
If outside the vehicle when the audible alarm acti-
vates,
do not open the cab door or hood.
In the event of an audible alarm, immediately follow
these procedures, as allowed by conditions:
Natural Gas Vehicles
25.5
Summary of Contents for cascadia
Page 1: ...Driver s Manual CASCADIA Part Number STI 478 Publication Number STI 478 6 ...
Page 106: ...9 Cab Features Windows 9 1 Mirrors 9 1 Cab Amenities 9 1 Sleeper Amenities 9 2 ...
Page 163: ...16 Drive Axles Differential Locks 16 1 Two Speed Drive Axles 16 2 ...
Page 167: ...17 Steering System Power Steering System General Information 17 1 Power Steering Systems 17 1 ...
Page 180: ...19 Trailer Couplings Air Suspension Dump Valve 19 1 Holland Trailer Coupling 19 1 ...
Page 229: ...26 Specifications Fuses and Relays 26 1 Replacement Bulbs 26 3 Fluids and Lubricants 26 4 ...