PREVOST X3-45 2016 - Page 64

Section 04: EXHAUST AND AFTERTREATMENT SYSTEM
PA1593
6
 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 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.
FIGURE 5: CATALYTIC CONVERTER
 Disconnect and remove a section of coolant
pipe assembly mounted between the
thermostat housing and the radiator inlet.
 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 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.