SECTION 04: EXHAUST AND AFTERTREATMENT SYSTEM
DOB 2490-2789 | X3-45 Commuter PA1605 Maintenance Manual (Final Version – Rev.2 April 2016)
7
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 any piece of
equipment or component that might be in
the way or that might prevent removing the
catalytic converter.
Procedure # 2
Set the starter selector switch to the
OFF
position.
Shut off the heater line shut-off valves.
Remove DOC and DPF assembly (Refer to
paragraph 2.1 in this Section).
Remove pipe connecting DOC & DPF
assembly to catalytic converter.
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 to facilitate re-
installation. Plug all openings to prevent dirt
from entering the system.
Disconnect and remove section of coolant
pipe assembly mounted between the
radiator outlet and the water pump inlet.
Disconnect and remove a section of coolant
pipe assembly mounted between the
thermostat housing and the radiator inlet.
Disconnect and remove a section of air
intake duct mounted between the air cooler
outlet and the engine.
Remove coolant surge tank.
Release tension from drive belt (Refer to
paragraph 12.1 and 15.1 in Section 05:
Cooling System).
Cut cable ties and disconnect electrical
connector from fan clutch. Remove fan drive
shaft fasteners at the gear box.
Remove radiator fan drive mechanism
support.
Safely support catalytic converter from the
top.
Disconnect catalytic converter outlet NOx
sensor.
Remove clamps holding catalytic converter
then lower.
Remove or disconnect any piece of
equipment or component that might be in
the way or that might prevent removing the
catalytic converter.
3.2 ASSEMBLING CATALYTIC CONVERTER
Before removing
Mark, with a vertical line the angular position
of the lower (both sides) and upper clamps
with regard to the clamps support located on
the catalytic converter.
Lower
Upper
Mark, with a vertical line the central position
of the lower and upper clamps with regard to
