SECTION 04 : EXHAUST AND AFTERTREATMENT
4. CATALYTIC CONVERTER
In the first instance, the catalytic converter of the
Selective Catalytic Reduction (SCR) does not
need any maintenance. Unless an accident or
damage occurs in the vicinity of the engine
compartment; the catalytic converter will not
have to be replaced.
However if the catalytic converter must be
replaced,
use
one
procedures:
1.7. REMOVAL
Procedure # 1
Radiator must be removed in order to lower the
catalytic converter for replacement.
Set the starter selector switch to the OFF
•
position.
•
Shut off the heater line shut-off valves.
•
Using the quick-connect drain hose, drain
the engine cooling system. Refer to Section
05, COOLING under "DRAINING COOLING
SYSTEM".
CAUTION
Tag hoses and cables for identification before
disconnecting
in
order
installation. Plug all openings to prevent dirt
from entering the system.
Disconnect and remove section of coolant
•
pipe
assembly
radiator outlet and the water pump inlet.
16
PA1621 Maintenance Manual All Series | Section 04 revised Feb 2019
of
the
two
following
to
facilitate
re-
mounted
between
the
FIGURE 6: CATALYTIC CONVERTER
Disconnect and remove a section of coolant
•
pipe
assembly
thermostat housing and the radiator inlet.
With the electric fan-clutch setup:
Disconnect the electric fan-clutch connector
•
located near the cooling fan right angle
gearbox.
Disconnect and remove the air intake duct
•
mounted between the turbocharger outlet
and the air cooler inlet.
•
Open radiator door. Unfasten bolts and
screws fixing radiator sealing frame.
•
Remove radiator and air cooler assembly.
WARNING
Due to the heavy load of the radiator assembly,
it must be adequately supported before
attempting to remove it.
Safely support catalytic converter from the
•
top.
Disconnect catalytic converter outlet NOx
•
sensor.
Remove clamps holding catalytic converter
•
then lower.
•
Remove
or
disconnect
equipment or component that might be in the
mounted
between
the
any
piece
of