Paccar MX-11, Operator'S Manual

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(HEST), Diesel Particulate Filter (DPF) and
Diesel Exhaust Fluid (DEF) warning lamps.
NOTE
The malfunction indicator lamp (MIL)
will illuminate if the on-board diagnos-
tics (OBD) system detects a possible
emissions system failure. The vehicle
should be brought in for service at the
next opportunity to ensure the condi-
tion is corrected.
Water-In-Fuel (WIF) Lamp
If the WIF notification is present, manually
drain the water at the engine mounted
primary fuel filter as soon as possible.
Failure to drain the water and then
continuing to operate the engine could
cause the water to be sent back to the fuel
tank. If this happens, draining the fuel tank
may become necessary. This procedure
can be avoided if the operator or technician
drains the water from the fuel filter module
frequently at the primary fuel filter.
Diesel Particulate Filter (DPF)
Warning Light
This icon and related message will appear
when the DPF needs to be regenerated
and then also during the regeneration
cycle. This may also appear if the system
is attempting to automatically regenerate
while the vehicle is in Power Take Off
operation mode.
Engine aftertreatment system includes a
diesel particulate filter and DPF warning
light.
High Exhaust System Temperature
(HEST) Warning Lamp
Keep vehicle a safe distance from
combustible items.
WARNING
Temperature of the tail pipe, exhaust
pipe, the diesel particular filter (DPF)/
selective catalytic reduction (SCR) de-
vice and surrounding components in-
cluding enclosures and steps, will be
elevated during and shortly after a re-
generation event or normal vehicle op-
eration when engine is under high or
heavy loading.
If the High Exhaust System Temperature
(HEST) warning lamp is on:
• Do not park in an area of
combustible vapors or materials.
You must keep combustibles at
least 5 ft. (1.5 m) away from the
exhaust (outlet) stream (as it exits
the tail pipe) while the HEST lamp
ENGINE OPERATION - Operating Instructions
Y53-1166-1M1 (10/2020) 15
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