ENGINE OPERATION - Operating Instructions 1 Extended Idling 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.
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. 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 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. CAUTION 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. 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. 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 26 Y53-1185-1E1 (04/16/18)