Navistar MaxxForce 10, Operation And Maintenance Manual

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SECTION 3 – INSTRUMENTS, INDICATORS, AND SWITCHES
High Exhaust System Temperature (HEST) Lamp
Figure 16 HEST Lamp.
WARNING
Exhaust components are operating under normal
conditions and exhaust gases are at extremely
high temperatures. When stationary, keep away
from people and flammable materials, vapors, or
structures, or stop the engine.
HEST lamp will illuminate when the exhaust system is hot and
regeneration is in progress. For additional information, see the
applicable
Vehicle Operator Manual .
Diesel Particulate Filter (DPF) Indicator
Figure 17 DPF Indicator.
The DPF indicator operates at three different levels.
Level One
• The DPF indicator will illuminate solid YELLOW and
remain on when the levels of soot exceed acceptable
levels. The regeneration process should begin by using
either of the following two methods. The lamp will turn
off when the regeneration process is complete.
• The vehicle can be safely driven on the highway at
highway speeds while the regeneration process is
in operation.
• Or the vehicle should be parked in a safe location
and start the Parked Regeneration process to
prevent loss of power.
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