•
Do not permit smoking or other ignition
sources within thirty feet of a natural gas
vehicle.
•
Have CO
2
fire extinguishers (ABC minimum)
located in a highly visible and easily accessible
location.
•
Use Purple-K powder (PKP) or a similar dry
powder to extinguish an LNG fire. Do not
attempt use water around an LNG fire.
In Case of Emergency
If a vehicle has sustained damage or a leak has
been discovered:
1.
Turn the ignition switch off, set the parking brake,
and disconnect the battery.
2.
Remove all ignition sources from the area
surrounding the vehicle.
3.
If it is safe to do so, close all fuel shutoff valves.
4.
Open the vehicle doors to introduce fresh air.
5.
Use a natural gas detector to identify leaks in the
fuel system.
Natural Gas Engine Starting
NOTE: Before starting the engine, read
Chapter 3 for detailed information on how to
read the instruments and
Chapter 4 for detailed
information on how to operate the controls.
Read the operating instructions in the engine
manufacturer’s operation manual before starting
the engine.
1.
Before engine start-up, complete the engine
pretrip and post-trip inspections and maintenance
procedures in
Chapter 22.
2.
Ensure the fuel shutoff valve is open.
3.
Set the parking brake.
4.
Ensure that the transmission shift control is in
Neutral (N), Park (P), or the Park Brake (PB)
position.
5.
Without starting the engine, turn the ignition
switch to the ON position. See
Fig. 19.1. The
electronic gauges on the instrumentation control
unit (ICU) will complete a full sweep of their
dials, the warning and indicator lights will
illuminate, and the buzzer will sound for three
seconds.
6.
Turn the ignition switch to the START position.
Press down on the clutch pedal, if equipped, but
do not press down on the accelerator pedal.
Release the key the moment the engine starts.
7.
Bring the engine up to operating speed gradually
as it warms up and develops stable oil pressure.
If the vehicle has not been operated previously in
a 24-hour period, allow the vehicle to idle for five
minutes.
NOTICE
Do not rev the engine if the oil pressure gauge
indicates no oil pressure. Shut down the engine
within approximately ten seconds to avoid engine
damage.
8.
Check the oil pressure gauge for any drop in
lubricating oil pressure or mechanical malfunction
in the lubricating oil system.
Natural Gas Fuel Tank Filling
Procedures
CNG Vehicle Fueling
CNG is moved from the fuel station storage tanks to
the vehicle cylinders through a metered dispenser.
During fueling, as pressure inside of the vehicle
cylinders increases, so does the temperature. The
dispenser shuts off when it determines the CNG
cylinders are full.
CNG fuel cylinders cannot be filled to their full
capacity of 3600 psi (24 800 kPa) in cooler weather.
Since temperature change causes gas to expand
and contract, less pressure in the cylinders on a cold
09/12/2001
f610509
Fig. 19.1, Ignition Switch Positions
Natural Gas Vehicle Information
19.2
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