CHASSIS INFORMATION — 10
250
2008 IMPERIAL
Park the motorhome on a level surface
and shift to
N (Neutral)
. Apply the
parking brake and allow the engine to
idle (500 to 800 RPM).
After wiping the dipstick clean, check
the
fl
uid level. Safe operating level is
anywhere within the Hot Run band on
the dipstick.
The width of the Hot Run band is
approximately one quart of
fl
uid at
normal temperature range.
If the level is not within this band, add
or drain the
fl
uid as necessary to put the
level within the Hot Run band.
Ensure that
fl
uid level checks are
consistent. Check the level more than
once. If readings are not consistent,
ensure the transmission breather is clean
and not clogged. If readings are still not
consistent, contact the nearest Allison
Service Center.
FUEL SYSTEM
Fuel Requirements
Diesel fuel classi
fi
ed as # 2 is used in
moderate and temperate climates. A winter
blend of #1 and #2 diesel fuels is available
during the winter months in cooler climates (or
possibly year-round in extremely cold or arctic
areas). The dispensing pump may not indicate
winter blend.
LSD (Low Sulfur Diesel) and ULSD (Ultra
Low Sulfur Diesel):
Beginning June 1, 2006, 80% of available
diesel fuel in the United States will have
less sulfur. Beginning October 15, 2006,
additional labeling on diesel fuel dispensing
pumps will re
fl
ect the reduction in sulfur to
include Ultra Low Sulfur Diesel (ULSD)
and Low Sulfur Diesel (LSD). ULSD fuel
contains a maximum sulfur content of 15 ppm
(parts per million) while LSD fuel contains
a maximum sulfur content of 500 ppm. 2007
and later model year engines and emission
systems are designed to use ULSD fuel. Refer
to the OEM engine manual for which type of
fuel is acceptable for use.
WARNING:
Use of LSD fuel in ULSD engines will
damage emission control systems and is
subject to fine.
CAUTION:
Engines designed for ULSD fuel require
specially formulated motor oil classified
by the API (American Petroleum
Institute) as category CJ-4.
NOTE:
Some states (including California) have
prohibited the sale of Low Sulfur Diesel.
Biodiesel:
Biodiesel is a synthetic fuel made from plant oil
or recycled cooking oil. Biodiesel is often sold as
a biodiesel/petrodiesel blend with an alphanumeric
designation that indicates biodiesel content. For
example: B5 is 5% biodiesel and 95% petrodiesel
while B100 is 100% biodiesel. Due to variances
in biodiesel, its use is restricted by the engine
manufacturer. Refer to the OEM engine manual
for acceptable biodiesel tolerances.
Tips:
Try to obtain fuel from sources that are
serviced often such as large truck service
facilities. The fuel supply is fresh and the
possibility of introducing contaminants or water
into the fuel system is reduced. If the engine
runs out of fuel, the fuel system will need to be
thoroughly primed before the engine will start
and run properly.
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