PREVOST X3-45 COMMUTER User Manual

SECTION 12: BRAKE AND AIR SYSTEM
30
DOB 1300-1556 | X3-45 Commuter PA-1648 Maintenance Manual Section 12 revised Jan 2021
12.13 ANTILOCK MODULATOR (M-32QR)
The M-32QR (quick release) antilock system modulator is high capacity,
on/off air valve that incorporate a pair of electrical solenoids for control. The
solenoids provide the electro-
pneumatic interface between the antilock
controller electronics and the air brake system. The modulator is used to
control the braking function on individual or dual service actuators during
antilock activity.
Maintenance and repair
information on the antilock modulator valve is
supplied in the applicable booklet, found on your Technical Publications
USB flash drive, under reference number
Bendix Service Data
SD-13-4870.
12.14 INVERSION VALVE (TR-2, TR-3)
The
TR-2 & TR-3 valves are normally open, pilot-operated, inverting, on-off,
two-way valves. As control pressure is reduced to the point that the piston
return spring or springs overcomes the force on the control piston, the
valve will deliver full supply pressure at the delivery port.
M
aintenance and repair information on the antilock modulator valve is
supplied in the applicable booklet, found on your Technical Publications
USB flash drive, under reference number
Bendix Service Data
SD-13-4650.
12.15 INLINE QUICK RELEASE VALVE (QR-L)
The QR-L quick release valve is a quick release valve. Its purpose is to
“speed up” the release of air from air lines and devices it is attached to.
Although primarily intended to enhance air system performance by rapidly
exhausting supply or control air pressure from vehicle air lines, it can be
used in a variety of different applications. It is uniquely suitable as an air
system performance enhancement due to its 0 psi crack and differential
pressure. Supply and delivery pressure is the same throughout the air
pressure range.
Maintenance and repair information on the inline quick release valve is
supplied in the applicable booklet, found on your Technical Publications
USB flash drive, under reference number
Bendix Service Data
SD-03-906.

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