PREVOST X3-45 Multiplex User Manual

Section 12: BRAKE AND AIR SYSTEM
PA1562
11
10.1.1 Compressor Removal and Installation
1. Exhaust compressed air from air system by
opening the drain valve of each air tank.
2. Drain the engine cooling system. See
Section 5: "Cooling System".
3. Identify and disconnect all air, coolant and
oil lines from the compressor assembly.
4. Access the compressor by the engine R.H.
side compartment. Remove the four com-
pressor mounting bolts and the two fuel
pump support bracket bolts.
5. Slide air compressor rearward to disengage
the hub from coupling. Remove the air
compressor.
Reverse removal procedure for installation.
10.2 WITH VOLVO D13 ENGINE
The Wabco System Saver 636 Twin Cylinder air
compressor is located on the alternator side of
the engine, at the flywheel end (Fig. 10). Its
function is to provide and maintain air under
pressure to operate devices in brake and air
systems.
The compressor is driven by the ring gear, and
is water cooled. Engine coolant is fed to the
compressor through a flexible hose tapped into
the block water jacket and connected to the rear
of the compressor. Coolant returns from the top
of the compressor (governor side) through a
flexible hose to the engine pump.
The air is taken from the air intake manifold and
entered in the top of the compressor. The
compressed air is pushed into the discharge line
located on side of the compressor, which sends
air to the air dryer. Lubricating oil is supplied to
the compressor by a line from the cylinder block
oil gallery connected to the air compressor.
Lubricating oil returns to the engine crankcase
through the air compressor drive assembly.
Maintenance and repair information on the
Wabco 636 Twin Cylinder air compressor is
supplied in the applicable booklet annexed at
the end of this section.
Item Description Notes
1 Air Compressor Wabco 636
2 O’Ring
3 Stud (3) M12
4 Flange Nut (3) Torque to 15lb-ft (20 Nm)
5 Nipple (2)
6 Hose Assembly
FIGURE 10: AIR COMPRESSOR LOCATION 03061
10.2.1 Compressor Removal and Installation
1. Exhaust compressed air from air system by
opening the drain valve of each air tank.
2. Drain the engine cooling system. See
Section 5: "Cooling System".
3. Access the compressor by the engine R.H.
side compartment. Identify and disconnect
all air, coolant and oil lines from the
compressor assembly.
4. Remove the three compressor flange
mounting nuts.
5. Slide air compressor rearward to disengage
the hub from coupling. Remove the air
compressor.
Remove and retain the oil supply tube that
runs between the compressor and the
engine
Reverse removal procedure for installation.

PREVOST X3-45 Multiplex Specifications

General

Length	45 ft
Width	102 in
Engine	Volvo D13
Horsepower	500 hp
GVWR	54, 000 lbs
Height	146 in
Sleeping Capacity	Varies based on floor plan
Water Capacity	Varies based on floor plan