General Information; Ignition Switch And Key - freightliner S2 Operator's Manual

Propane Fuel System

General Information

CAUTION
The propane fuel system requires special tools to
make repairs. Service and repair of the propane
fuel system should only be performed by trained
propane service technicians. To prevent personal
injury or damage to the fuel system, do not at-
tempt repairs yourself.
DANGER
Never cut or weld on the propane storage tank.
Severe bodily injury or fire could result.
Propane is highly flammable. Keep sparks and
open flames away from propane. Do not smoke
when refueling the vehicle. Failure to observe
these safety precautions could cause serious
bodily injury or death.
The information provided in this chapter is specific to
the propane engine, however, other chapters in this
manual pertain to the propane operated vehicle.
These include, but are not limited to, the controls and
pretrip inspection and daily maintenance chapters.
IMPORTANT: For assistance with propane en-
gine related questions, contact Powertrain Inte-
gration at 1-877-336-6308.
NOTE: Oil consumption is normal during opera-
tion of the propane engine. The rate of con-
sumption is highly dependent on vehicle loading
and duty cycles. New engines may experience
higher oil consumption during the engine
break-in period. For further information, refer to
the engine manufacturer's manual or contact
Powertrain Integration.
NOTICE
If the ignition switch is in the RUN position for
more than 15 seconds and the fuel tank is empty,
the fuel pump must be unplugged. Failure to fol-
low this procedure will result in damage to the
fuel pump. Refer to the propane engine manual
for instructions on how to unplug the fuel pump.
HD5 grade propane is recommended for propane
engines. HD5 is a heavy duty engine grade propane
19.1
with a minimum of 90% propane and a maximum of
5% propylene. This grade of propane is 100 plus oc-
tane and provides proper performance and emissions
control, which the fuel system is designed to deliver.
The engine is designed to operate properly on a
wide variety of liquid propane gas (LPG) blends
which can fall in the category of HD5, and is not af-
fected by "heavy ends" or other waxy hydrocarbons
that have traditionally affected other systems.
NOTICE
LPG should be free of contaminants including,
but not limited to, rust, dirt, sand, water, salt, and
brine. These contaminants can cause engine
damage that is not covered by the engine war-
ranty.
WARNING
The propane fuel system operates at pressures
up to 312 psi (2151 kPa). A sudden release of
propane can cause serious injuries if it contacts
the skin or eyes. Always wear protective gloves
and eye protection when handling propane.
LPG has no color. A distinctive odorant, similar to
sulfur or rotten eggs, is added to LPG to alert any-
one nearby in the event of a leak.

Ignition Switch and Key

The ignition switch has four positions: ACCESSORY,
OFF, RUN, and START. See
08/27/2013
Fig. 19.1, Ignition Switch Positions
Fig. 19.1.
f610509a