Ford 750 2009 Owner's Manual page 193

Diesel particulate filter regeneration (Caterpillar engine only)
DPF regeneration requires no operator interaction and may occur at any
time. A small increase in engine sound-level during filter regeneration is
normal and should be no reason for concern.
A separate fuel injector/nozzle, which requires periodic cleaning, is used
in the regeneration process. Refer to Caterpillar's Operation and
Maintenance Manual for details regarding cleaning requirements.
Diesel particulate filter regeneration (Cummins engine only)
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])
Diesel Particulate Filter Four–Level Loading Chart
Level/Lamp status
Level 1
DPF lamp solid
Level 2
DPF lamp flashing
(once per second)
Level 3
DPF lamp flashing +
Service Engine Soon
lamp solid
2009 F-650/750 (f67)
Supplement
USA (fus)
Maintenance and Specifications
Filter status
Regeneration required.
Nearly full. Engine
performance is limited.
Full. Engine is
increasingly limited.
Requested action
Drive on highway at
highway speeds OR
start "parked
regeneration" to
prevent loss of engine
performance.
Perform "parked
regeneration" to
prevent loss of engine
performance.
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