AGCO Power 49 - SCR System Components and Their Functions

Do not fit any components on the engine other than those originally intended for it. The use of other than
original AGCO Parts spare parts invalidates the responsibility of AGCO Power Inc. on the meeting of the
emission requirements.
NOTE: This manual only provides general information relating to SCR system. All service and repair work
should only be performed by someone with special training and the necessary special tools and gauges. All
servicing and repair work relating to the SCR system requires particular care and cleanliness!
1.3.13.2 SCR system components and their functions
Fig. 19
The exhaust gas aftertreatment system used is Bosch DENOXTRONIC2.2 (DNOX2.2). DNOX2.2 uses SCR
(Selective catalyst reduction) technology in order to reduce the exhaust emissions from the engine.
AGCO POWER SCR system consists of engine control system and DNOX2.2 SCR system. These two
systems are connected together via CAN bus.
See instructions of the appliance for location and instructions for removing and installing the SCR system
components.
Supply module
Supply Module (SM) transfers NOx reductant (DEF) from tank and pressurizes it. It contains also filters for
reductant (prefilter and mainfilter).
Dosing module
Dosing module (DM) is installed in the exhaust pipe between turbocharger and SCR catalyst. DM contains
an electrically operated, ECU controlled solenoid valve, which will inject the required amount of DEF
through the DM nozzle. DEF amount is calculated by EEM4 for optimal reduction of NOx.
1. Introduction
4th Generation Engines 1-23
8370 79492