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EXHAUST SYSTEM
69
9/275, 9/305, 12/250, 17/240, 21/220
Active regeneration will occur more frequently in equipment with low
load, or stop and go duty cycles.
Active regeneration only occurs if the engine ECM has detected that
the aftertreatment diesel particulate filter restriction has reached a
specified limit. The engine ECM will activate and de-activate
regeneration as needed.
Active regeneration is largely transparent to the equipment operator.
The equipment operator may notice an increase in turbocharger noise
during an active regeneration event, an may notice that the high
exhaust temperature lamp is illuminated, if the exhaust temperature is
greater than the high exhaust system temperature threshold set by the
equipment OEM.
During active regeneration, the exhaust temperature can be hotter than
when the engine is operating at full load. The exhaust temperature
during a normal active regeneration event could reach 600°C (1100°F),
and possibly 800°C (1500°F) under certain conditions.
Manual (Non-Mission)
Under some operating conditions, such as low speed, low load, or stop
and go duty cycles, the engine may not have enough opportunity to
regenerate the aftertreatment diesel particulate filter during normal
operation. When this occurs, the engine will illuminate the
aftertreatment diesel particulate filter lamp to inform the operator that
assistance is required, typically in the form of a Manual (non-mission)
regeneration.
Manual (non-mission) regeneration is a form of active regeneration that
is initiated by the equipment operator when
not
in operation.
Manual (non-mission) regeneration requires an elevated engine speed
of approximately 1000 to 1400 RPM. The length of a manual (non-
mission) regeneration will vary depending on how full the
aftertreatment diesel particulate filter is, but will typically take anywhere
from 45 minutes to 1.5 hours to complete.
A manual (non-mission) regeneration can be initiated one of two ways:
•
An equipment mounted manual (non-mission) regeneration switch.
Use the owners manual for the location and operation of this switch.
The mounted manual (non-mission) regeneration switch will only
initiate a manual (non-mission) regeneration when the aftertreatment
diesel particulate filter lamp is illuminated.
•
The INSITE™ electronic service tool can initiate a manual (non-
mission) regeneration by starting the "Aftertreatment Diesel Particulate
Filter Regeneration Test".
To perform a manual (non-mission) regeneration, follow the steps
listed:
•
Select an appropriate location to park the equipment.
•
Ensure there are no objects directly above the exhaust.
NOTE:
See Section 1 of the Owner's Manual or Operation &
Maintenance Manual of the engine being serviced for additional
information on the engine indicator lamps.
WARNING: During regeneration, exhaust gas temperature could
reach 800°C (1500°F).
WARNING: During regeneration, exhaust gas temperature could
reach 800°C (1500°F), and exhaust system surface temperature
could exceed 700°C (1300°F), which is hot enough to ignite or
melt common materials, and to burn people. Engine speed will
increase and could possibly reach between 1000 to 1500 RPM.
Follow these instructions to avoid the risk of fire, properly
damage, burns, or other serious personal injury.