7 - MAINTENANCE
Clean Up Catalyst (CUC)
The Clean Up Catalyst (CUC) is located at the end of the
SCR catalyst. The CUC converts the ammonia (NH
3
) slip
to nitrogen (N
2
) and water vapor (H
2
O). The CUC ensures
that the ammonia slip to ambient is minimal.
LEIL14WHL0450AA
6
621G
LEIL13WHL0308AA
7
721G
Exhaust flap
The exhaust flap is a device located between the turbine
and the exhaust system. The exhaust flap is equipped
with a throttle valve which manages the rate and the “light
off” temperature of the exhaust gas.
The “light off” temperature indicates the temperature at
which the catalytic process is initiated.
LEIL13WHL0312AB
8
7-26
Summary of Contents for 621G Stage IV
Page 42: ...2 SAFETY INFORMATION Empty tool LEEN11T0024AA 20 2 22 ...
Page 60: ...2 SAFETY INFORMATION 2 40 ...
Page 137: ...3 CONTROLS AND INSTRUMENTS Inducement and validation re starts LEIL14WHL0394HA 2 3 77 ...
Page 138: ...3 CONTROLS AND INSTRUMENTS Validation re start procedure LEIL15WHL0608HA 3 3 78 ...
Page 150: ...3 CONTROLS AND INSTRUMENTS 3 90 ...
Page 166: ...4 OPERATING INSTRUCTIONS RCPH10WHL045BAH 7 4 16 ...
Page 168: ...4 OPERATING INSTRUCTIONS RCPH10WHL045BAH 9 4 18 ...
Page 170: ...4 OPERATING INSTRUCTIONS RCPH10WHL045BAH 12 4 20 ...
Page 208: ...6 WORKING OPERATIONS 6 18 ...
Page 229: ...7 MAINTENANCE DEF AdBlue technical faults LEIL14WHL0392HA 4 7 21 ...
Page 370: ...7 MAINTENANCE 7 162 ...
