Assembling Catalytic Converter - PREVOST H3-41 Maintenance Manual

SECTION 04 : EXHAUST AND AFTERTREATMENT

Remove or disconnect
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.
With the electric fan-clutch setup:

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
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.

Disconnect and remove a section of coolant
pipe assembly
thermostat housing and the radiator inlet.

Disconnect and remove the air intake duct
mounted between the turbocharger outlet
and the air cooler inlet.

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.
14 PA1621 Maintenance Manual All Series | January 2017
any piece
to facilitate re-
mounted between the
mounted between the

of Disconnect catalytic converter outlet NOx
sensor.

Remove clamps holding catalytic converter
then lower.
With all setups:

Remove
equipment or component that might be in
the way or that might prevent removing the
catalytic converter.

4.2 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
the emboss located at the bottom and at the
top of the catalytic converter.
Lower
or disconnect any piece of