PREVOST X3-45 COMMUTER User Manual

SECTION 12: BRAKE AND AIR SYSTEM
38
DOB 1300-1556 | X3-45 Commuter PA-1648 Maintenance Manual Section 12 revised Jan 2021
Example 2)
E=0.453 in (11.5 mm)
F=0.512 in (13 mm) > OK
FIGURE 31: EXAGGERATED WEAR DIFFERENCE
BETWEEN INNER AND OUTER BRAKE PADS
Exaggerated tangential oblique wear of
brake pads
The total thickness of the friction material at
either end of the pad should be equal. If the
difference between the two ends is greater than
2 mm, then the following checks are necessary:
• Bearing clearance check (see 16.2.7 to
16.2.9).
• Free movement of the brake pads in the
caliper (see 16.2.6).
• Possible collision with other parts on the
axle or vehicle body.
• Excessive dirt and grime present.
• Piping of the compressed air line. In
addition, the piping must be replaced.
Example 1)
G=21 mm
H=18 mm > NOT OK
Example 2)
G=18 mm
H=19 mm > OK
FIGURE 32: EXAGGERATED TANGENTIAL OBLIQUE
WEAR OF BRAKE PADS
Exaggerated taper wear of brake pads
The total thickness of the friction material in the
radial direction should be equal. If the difference
between the top and bottom ends is greater
than 1 mm, then the following checks are
necessary:
• Bearing clearance check ((see 16.2.7 to
16.2.9).
• Free movement of the brake pads in the
caliper (see 16.2.6).
• Possible collision with other parts on the
axle or vehicle body.
• Excessive dirt and grime present.
FIGURE 33: BRAKE PAD WITH EXAGGERATED TAPER
WEAR

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