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1.0 INTRODUCTION ........................................................................................................................... 5
2.0 MANDATORY INSTALLATION REQUIREMENTS ..................................................................... 7
.................................................................................................................................. 8
2.5.1 General .............................................................................................................................. 8
2.5.2 Positioning ......................................................................................................................... 8
2.5.3 DEF Tank Mounting ........................................................................................................... 9
2.5.4 DEF filler neck extensions/Remote Fill .............................................................................. 9
2.8.1 DEF tank to PEU .............................................................................................................. 11
2.8.2 PEU to DEF injector ......................................................................................................... 12
.............................................................................................................................. 15
3.0 SCR SYSTEM FUNDAMENTALS .............................................................................................. 16
3.2.1 General DEF Information ................................................................................................. 16
3.2.2 Standards ......................................................................................................................... 16
3.2.3 DEF Quality. ..................................................................................................................... 16
3.2.3 DEF Storage .................................................................................................................... 16
4.0 SCR SYSTEM ............................................................................................................................. 18
4.2.1 DEF Tank ......................................................................................................................... 20
4.2.2 DEF Filler Cap ................................................................................................................. 21
4.2.3 DEF tank header .............................................................................................................. 21
4.2.4 Coolant Lines and valve .................................................................................................. 22
4.2.5 DEF Pump ....................................................................................................................... 23
4.2.5 DEF Control Unit (DCU) .................................................................................................. 23
4.2.6 DEF Lines ........................................................................................................................ 24
4.2.7 DEF injector ..................................................................................................................... 25
4.3.1 DEF Component temperature Requirements .................................................................. 26
4.3.2 DEF Component Vibration Requirements ....................................................................... 27
5.0 SCR SYSTEM DESIGN CONSIDERATIONS ............................................................................ 28
5.2.1 Coolant Connections........................................................................................................ 29
5.2.2 DEF Connection Detail .................................................................................................... 31
................................................................................................................................ 33
5.3.1 Rubber Components (Seals, etc.) ................................................................................... 33
5.3.2 Metallic Components ....................................................................................................... 33
............................................................................................................................... 34
5.4.1 DEF Tank Sizing .............................................................................................................. 34
5.4.2 DEF Tank Mounting and Installation ................................................................................ 35
5.4.3 DEF Tank Straps ............................................................................................................. 35
A&I manual Publication TPD 1832 - Production issue 3.
.............................................................................................................. 5
............................................................................................................................. 6
............................................................................................................ 7
.............................................................................................................................. 7
............................................................................................................... 7
.................................................................................................................... 7
.............................................................................................................................. 9
DCU)................................................................................................... 10
................................................................................................................. 13
........................................................................................... 14
......................................................................................................... 16
(DEF) ................................................................................................... 16
........................................................................................................................... 17
................................................................................................... 18
........................................................................................................................... 20
...................................................................................................... 26
.......................................................................................... 28
......................................................................................................... 28
1204F - DEF System Supplement
...................................................................................... 11
Page 3 of 41
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