Exhaust Aftertreatment System - Mack Granite GU Series Operator's Handbook Manual

Mack, EPA2010 Emissions Solution 243
display is available there will be no indication of an ATS conditioning event
except for the automatic increase in engine speed.

Exhaust Aftertreatment System

GU Standard System View
1. Selective Catalytic Reduction (SCR)
Catalyst
2. Aftertreatment DEF Dosing Unit
3. Aftertreatment Diesel Particulate
Filter (DPF)
4.Aftertreatment DEF Tank
Diesel Exhaust Fluid (DEF) is a reactant
that's key to the SCR process. It's a
nontoxic, ultra-pure solution of urea and
ultra-pure water. Urea is a compound
of nitrogen that turns to ammonia when
heated. It is used in a variety of industries,
perhaps most commonly as a fertilizer in
agriculture. The fluid is non flammable,
and is not dangerous when handled as
recommended. However, it is highly
corrosive to certain metals, espically
copper and brass. Read the separate
section concerning the handling of DEF
solution.
W2029933