Ford F-650 2008 User Manual page 182

Maintenance and Specifications
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
Level 3
DPF lamp flashing +
Service Engine Soon
lamp solid
Level 4
Stop Engine lamp
solid
182
2008 F-650/750 (f67)
Supplement
Filter status
Regeneration required.
Nearly full. Engine
performance is limited.
Full. Engine is
increasingly limited.
Over full. Engine
performance is highly
limited. Continued
operation may result
in irreparable damage
to the filter.
Requested action
Drive on highway at
highway speeds OR
started "parked
regeneration" to
prevent loss of engine
performance.
Perform "parked
regeneration" to
prevent loss of engine
performance.
Pull vehicle safely off
roadway, turn on
hazard flashers and
shut down engine as
soon as possible. Seek
service immediately.