Removal - PREVOST H3-41 Maintenance Manual

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:

4.1 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.
of the two following
to facilitate re-
mounted between the
SECTION 04 : EXHAUST AND AFTERTREATMENT
FIGURE 5: 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.
PA1621 Maintenance Manual All Series | January 2017
mounted between the
13