Maintenance work on the carrier
7.5 Exhaust system with exhaust emission control
16.08.2018
Maintenance manual 3 302 577 en 7 - 35
GMK7450
7.5 Exhaust system with exhaust emission control
Overview In order to adhere to the exhaust emission regulations, you are only permit-
ted to drive the crane with the multi-stage exhaust system consisting of
DOC catalytic converter, DPF particle filter, SCR catalytic converter (DOC =
Diesel Oxidation Catalyst, DPF = Diesel Particulate Filter, SCR = Selective
Catalytic Reduction).
The exhaust gas is cleaned with an AdBlue system (DEF). AdBlue (DEF)
(Diesel Exhaust Fluid) from the from the DEF tank is injected into the mixing
tube in the exhaust system for this.
The motor output is automatically sharply reduced when there is not
enough AdBlu
e solution available. Driving with an empty AdBlue tank will
invalidate the truck crane's licence for use on public roads;
à Operating
manual
, à Engine manufacturer’s documentation.
AdBlue system
1 Pu
mp unit
for pumping AdBlue to
the dosing unit
on the diesel engine and for pumping
engine coolant for preheating the
AdBlue tank.
2 AdBlue tank.
3 Tank gauge, AdBlue tank
4 Warning lamps:
AdBlue system fault.
5 Diesel engine
with dosing unit for AdBlue (compressed
air supply) and a solenoid valve for pre-
heating the AdBlue tank using engine
coolant.
6 Exhaust pipe:
DOC catalytic converter and DPF particle
filter.
7 AdBlue mixing tube with injection nozzle
for injecting the AdBlue/compressed air
mixture.
8 Exhaust pipe:
SCR catalytic converter.
9 Exhaust end pipe.
10 3 warning lamps:
Exhaust gas temperature, active/passive
regeneration of the exhaust gas filter.
11 Heat shield.
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