Manitowoc MLC150-1, Service Maintenance Manual

Page: 173 / 206

Manitowoc
Published 03-21-2021, Control # 264-01
7-13
MLC150-1 SERVICE/MAINTENANCE MANUAL POWER TRAIN
7
EXHAUST AFTERTREATMENT SYSTEM
See Figure 7-9 for the following instructions.
Table 7-3. Abbreviations
The engine exhaust is treated to significantly reduce the
amount of harmful by-products of combustion from
contaminating breathable air.
The APS captures soot and ash from the engine exhaust:
• Soot is partially burned fuel particles that occur during
normal operation (black smoke).
• Soot is automatically removed by a process called
regeneration.
• Ash is partially burned engine oil particles that occur
during normal operation.
Engine Regeneration and Inhibit
See Section 3 of the MLC150-1 Operator Manual for
operation of the Engine Regeneration/Inhibit switch in the
operator cab.
Tier 4/Euro Stage 5 Main Display Icons
Refer to MLC150-1 Main Display Operation Manual for
identification of the exhaust aftertreatment icons that appear
in the Crane Systems Status Bar of the main display.
DEF Tank
The DEF tank (1) houses 56 L (15 gal) of DEF. DEF consists
of 32% urea and 68% de-ionized water. A metered mist of
DEF, approximately equal to 10% of the fuel used, is injected
into the decomposition reactor module (5).
There is a 40-micron filter on the DEF suction tube inside the
tank. For filter maintenance intervals and procedures, refer
to the refer to Cummins’ literature/online site for detailed
instructions.
The DEF level can be monitored in the Crane Systems
Status Bar of the main display. See the MLC150-1 Main
Display Operator Manual.
The drain plug (1B) is provided in case the tank needs to be
emptied of poor-quality DEF.
NOTE: Do not store DEF for long periods of time. DEF
deteriorates relative to time and temperature. Low-
quality DEF may require the tank to be drained and
the system purged.
DEF Supply Module
The DEF supply module (2) is an electronically operated
pump and metering system controlled by the ECM. The
Abbreviation Description
APS Aftertreatment Protection System
DEF Diesel Exhaust Fluid
DOC Diesel Oxidation Catalyst
dP Delta Pressure
DPF Diesel Particulate Filter
ECM Engine Control Module
HEST High Exhaust System Temperature
SCR Selective Catalytic Reduction
NH
3
Ammonia
NO
x
Generic term for the mono-nitrogen
oxides NO and NO2 (nitric oxide and
nitrogen dioxide). They are produced
from the reaction of nitrogen and oxygen
gases in the air during combustion.
WARNING
Hot Exhaust Surfaces and Inhalation Hazards!
Extremely hot surfaces and exhaust gases can
cause death or serious injury.
When the HEST fault is activated on the main
display (in the cab), warn people to stay at least
1,5 m (5 ft) away from the exhaust pipe. Make
sure the exhaust pipe is not directed at
anything that can melt, burn, or explode.
Allow the engine and the exhaust system to
cool before servicing.
WARNING
Chemical Hazard!
DEF contains urea. Do not get DEF in your eyes. In case
of contact, immediately flush your eyes with large
amounts of water for a minimum of 15 minutes. Do not
swallow. If DEF is ingested, contact a physician
immediately.
CAUTION
Loss of Power or Engine Shutdown Hazard!
If poor-quality DEF or a low-level condition is sensed, an
error code is activated. These conditions can lead to
engine power being reduced (derated) by the ECM. If the
condition persists, engine low idle lock may occur.
REFERENCE
ONLY