PREVOST X3-45 COMMUTER User Manual

SECTION 12: BRAKE AND AIR SYSTEM
DOB 1300-1556 | X3-45 Commuter PA-1648 Maintenance Manual First release Oct 2020
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12.10 PRESSURE PROTECTION VALVE (PR-4)
Maintenance and repair information on the pressure protection valve is
supplied in the applicable booklet, found on your Technical Publications
USB flash drive, under reference number Bendix Service Data SD-03-
2010.
The air system includes two pressure pro
tection valves. One valve is
installed on the manifold block, and insures at all times a minimum
pressure of 70 psi (482 kPa) in the suspension air system in the event that
a pressure drop occurs in either the suspension air system or accessory air
system. This valve is located in the front service compartment beside the
air filter.
The other valve is installed on the acces
sory air tank, and insures a
minimum pressure of 70 psi (482 kPa) in the accessory air system in the
event that a pressure drop occurs in either the suspension air system or
braking air system.
12.11 SHUTTLE-TYPE DOUBLE CHECK VALVE (DC-4)
Maintenance and repair information on the shuttle-type double check valve
is supplied in the applicable booklet, found on your Technical Publications
USB flash drive, under reference number
Bendix Service Data
SD-03-2202.
The double check valve is located on the pneumatic accessories panel in
the front service compartment. In the event of a pressure drop in either the
primary or secondary system, this unit will protect the emergency /parking
brake control valve and the intact portion of the air system from pressure
loss.
12.12 PRESSURE REDUCING VALVE RV-3
The Bendix RV-3
pressure reducing valve is a normally open pressure
control device. The function of the RV-
3 valve is to reduce system air
pressure and maintain a constant specified pre-set pressure below that of
system pressure. A pressure reducing valve is installed upstream of the
AHI module (Aftertreatment hydrocarbon injector).
Maintenance and repair information on the pressure reducing valve is
supplied in the applicable booklet, found on your Technical Publications
USB flash drive, under reference number
Bendix Service Data
SD-03-3515.

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