PREVOST X3-45 COMMUTER User Manual

SECTION 04 : EXHAUST AND AFTERTREATMENT
14
DOB 1300-1556 | X3-45 Commuter PA-1648 Maintenance Manual Section 04 revised March 2021
FIGURE 8: CATALYTIC CONVERTER
5. Disconnect and remove a section of coolant
pipe assembly mounted between the
thermostat housing and the radiator inlet.
6. Disconnect and remove the air intake duct
mounted between the turbocharger outlet
and the air cooler inlet.
7. Open radiator door. Unfasten bolts and
screws fixing radiator sealing frame.
8. 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.
9. Safely support catalytic converter from the
top.
10. Disconnect catalytic converter outlet NOx
sensors.
11. Remove clamps holding catalytic converter
then lower.
12. Remove or disconnect any piece of
equipment or component that might be in
the way or that might prevent removing the
catalytic converter.
Alternate Procedure
In this alternate procedure, the radiator remains
in place. Rather, it is the coolant tank that is
removed to lower the catalytic converter for
replacement.
1. Set the starter selector switch to the OFF
position.
2. Shut off the heater line shut-off valves.
3. Remove DOC and DPF assembly (Refer to
paragraph 2.1 in this Section).
4. Remove pipe connecting DOC & DPF
assembly to catalytic converter.
5. 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.
6. Disconnect and remove section of coolant
pipe assembly mounted between the
radiator outlet and the water pump inlet.
7. Disconnect and remove a section of coolant
pipe assembly mounted between the
thermostat housing and the radiator inlet.
8. Disconnect and remove the air intake duct
mounted between the turbocharger outlet
and the air cooler inlet.
9. Remove coolant surge tank.
10. Release tension from drive belt (Refer to
paragraph 12.1 and 15.1 in Section 05:
Cooling System).
11. Safely support catalytic converter from the
top.
12. Disconnect catalytic converter outlet NOx
sensor.
13. Remove clamps holding catalytic converter
then lower.
14. Remove or disconnect any piece of
equipment or component that might be in
the way or that might prevent removing the
catalytic converter.

PREVOST X3-45 COMMUTER Specifications

General

Engine	Volvo D13
Transmission	Allison B500
Fuel Type	Diesel
Length	45 ft (13.7 m)
Width	102 in (2.6 m)
Horsepower	500 hp
GVWR	54, 000 lbs
Height	141 in