operators_manual

Extended Idling
CAUTION
Prolonged periods of idling can result
in lower than optimal engine/transmis-
sion operating temperatures which
could cause increased rates of wear.
An idle shutdown feature (available on
PACCAR engines) can be program-
med to shut the engine down after a
period of low idle operation with no
driver activity. A flashing warning lamp
will inform the driver of an impending
shutdown. Failure to comply may re-
sult in equipment or property damage.
CAUTION
If the truck is equipped with power
take off (PTO) equipment, the engine
shutdown system can be deactivated
when the PTO is operational; however,
engine idle periods should not exceed
five minutes whenever possible. Fail-
ure to comply may result in equipment
or property damage.
Long periods of idle-time (3 hours or more)
may accelerate the build up of soot in the
diesel particulate filter (DPF), especially in
cold weather. The system will illuminate the
DPF warning light on the instrument cluster
and a message on the Driver Information
Display to indicate that the DPF requires
regeneration. This is not a problem with the
vehicle; however, it indicates that the driver
needs to start a parked DPF regeneration
to prevent equipment damage caused by
soot build up. If the DPF lamp turns ON
and the driver is prompted to through driver
notifications, perform a parked DPF
Regeneration.
CAUTION
If you ignore the warning lamp and do
not initiate regeneration at the soon-
est, safest possible time, the DPF will
become increasingly clogged with soot
and can lead to severe engine derate.
Failure to comply may result in equip-
ment or property damage.
Extended engine idling may also increase
hydrocarbon deposits and moisture in the
DPF. The engine will increase rpm
automatically, regardless if the DPF lamp is
on or off, to remove these hydrocarbon
deposits and moisture. The engine speed
will remain elevated for 20-60 minutes. If
necessary, the rpms may be lowered by
briefly depressing the throttle, clutch, or
brake pedal. If the driver cancels the
automatic cycle using the pedals, the
system will restart the cycle 10 minutes
later with increased rpm until all of the
deposits are removed from the DPF. If the
vehicle cannot perform an automatic cycle,
the driver may be prompted with message
to regenerate the DPF with a "Do Not
Drive" message. The driver must complete
a regeneration before driving. If the "Do
Not Drive" message is ignored and a DPF
regeneration is not fully completed before
driving, there is a high possibility of
equipment damage.
If an engine must idle for an extended
period of time, idle the engine at the lowest
rpm that maintains the engine coolant at
150°F (70°C), or above.
ENGINE OPERATION - Operating Instructions
26 Y53-1185-1E1 (04/16/18)
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