Propane Refueling - freightliner S2 Operator's Manual

N (Neutral)
The neutral position places the transmission in neu-
tral. When neutral is selected, the vehicle service
brakes, parking brake, or emergency brake must be
applied. Selecting neutral does not apply vehicle
brakes unless an auxiliary system to apply the park-
ing brake is installed.
This position is used when starting the engine and
for stationary operation. It is also used to shut down
the vehicle when P (park) or PB (auto-apply parking
brake) are not available on the shifter. In this case,
the parking brake must be applied.
Do not let the vehicle coast in neutral. If the vehicle
is allowed to coast in neutral, the engine brake will
not work and the driver could lose control of the
vehicle.
D (Drive)
In the drive position, the transmission will initially go
into first range when drive is selected. As vehicle
speed increases, the transmission will upshift auto-
matically through each available range up to fifth or
sixth range. As the vehicle slows, the transmission
will downshift automatically.
When going downhill, downshift to a lower transmis-
sion range to increase engine braking and to help
maintain control. The transmission has a feature to
prevent automatic upshifting above the lower range
selected. However, during downhill operation, the
transmission may upshift to the next higher range, if
the engine is exceeding its governed speed in the
lower range.
NOTE: The shift into drive may not succeed if a
range inhibitor is active. Check the driver dis-
play screen in the instrument panel for a
RANGE INHIBIT message.
4 and 3 (Fourth and Third Ranges)
Use the fourth or third range for heavy city traffic and
for braking on steep downgrades.
L (Low Range)
Use low range when pulling through mud or deep
snow, when maneuvering in tight spaces, or when
driving up or down very steep grades. Low range
provides the vehicle with its maximum driving torque
and maximum engine braking effect.
Propane Fuel System
NOTE: To have the transmission select these
ranges automatically, leave the selector lever in
D (drive).

Propane Refueling

CleanFuel USA recommends that the Liquid Propane
Injection® (LPI) vehicle be refilled with fuel at sta-
tions that are specifically designed for vehicle refuel-
ing. For assistance locating LPG fuel stations, con-
tact CleanFuel USA at www.cleanfuelusa.com
1-512-864-0300.
The propane fuel system utilizes a closed system,
with fuel supply and return lines. This requires more
advanced refueling equipment due to variances in
pressure. When refueling the vehicle at a station not
specifically designed for dispensing propane (also
referred to as autogas), the refueling process may be
very slow or the tank may not fill at all. The vehicle
propane tank is subjected to heat from the pavement
and chassis components, which cause a normal in-
crease in tank pressure. The station pump may not
be able to produce pressure high enough to over-
come that of the tank on the vehicle. It is recom-
mended that the filling dispenser have a minimum of
90 psi (621 kPa) pump differential boost pressure
over the storage tank pressure; most modern sta-
tions are designed to 130 psi (896 kPa) differential
pressure. It is recommended to refuel the vehicle at
a modern station to prevent any customer inconve-
nience.
LPI fuel tanks are equipped with both an 80% fixed
liquid level gauge, and an automatic overfill protec-
tion device (OPD). The LPI system is designed to be
filled reliably and safely using only the OPD. There-
fore, it is not recommended to use the 80% fixed liq-
uid level gauge unless required by the filling station
attendant, or for annual OPD verification. See the
CleanFuel USA Owners Manual Supplement for in-
structions on how to perform the annual OPD verifi-
cation test.
CAUTION
Liquid propane can cause serious burns should
it contact the skin or eyes. When handling pro-
pane, always wear protective gloves and eye pro-
tection to prevent contact.
Propane is extremely flammable, and can ignite if
an ignition source is present, causing burns and
or at
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