Conditions
•
Carrying unnecessary weight may reduce fuel economy.
•
Fuel economy may decrease with lower temperatures during the first
8–10 miles (12–16 km) of driving.
•
Flat terrain driving improves fuel economy over hilly roads.
•
Transmissions give their best fuel economy when operated in the top
cruise gear and with steady pressure on the accelerator.
•
Close windows for highway driving.
DIESEL PARTICULATE FILTER (DPF)
Your vehicle is equipped with a diesel particulate filter (DPF), as part of
the after-treatment exhaust system, to trap soot and other large particles
produced by the engine combustion process. The soot that accumulates
in the filter must be periodically reduced to ash to prevent excessive
exhaust restriction. The soot reduction process, also known as “filter
regeneration,” is generally performed automatically by your engine and
after-treatment system.
WARNING:
The normal operating temperature of the exhaust
system is very high. Never work around, or attempt to repair,
any part of the exhaust system until it has cooled. Use special care
when working around the diesel particulate filter. The DPF heats up to
a high temperature after only a short period of engine operation, and
can remain hot even after the engine is turned off. Failure to follow
these instructions may result in personal injury.
Diesel particulate filter regeneration
Under most operating conditions, DPF regeneration will be transparent
to the operator. A small increase in engine/turbo sound-level is normal
during filter regeneration. If, however, your engine is operated for
extended periods of time under one of the following conditions, operator
assistance may be required to facilitate the filter regeneration process:
•
Vehicle is operated in stop-and-go traffic and/or maintains low speeds
as in a city/delivery driving
•
Engine is started and shut-off frequently
•
Vehicle payload is relatively light
•
Vehicle is regularly operated in cold ambient temperatures (i.e. below
0°F [-18°C])
2009 Low Cab Forward Truck
(lcf)
Supplement
USA
(fus)
Maintenance and Specifications
148