PREVOST X3-45 COMMUTER User Manual

SECTION 12: BRAKE AND AIR SYSTEM
46
DOB 1300-1556 | X3-45 Commuter PA-1648 Maintenance Manual Section 12 revised Jan 2021
16.2.10 Checking Sealing Elements – Caliper
Guide Pin Seals
The guide pin (5a or 5b) (as fitted to the fixed
bearing side) is sealed with cover (10a or 10b)
and inner boot (9a or 9b).
The floating bearing side with guide pin (4c, 4d
or 4e) is sealed with inner boot (9c, 9d or 9e)
and with cover (68c 68d or 68e). All variants (9),
(10) and (68) must be free of any signs of
damage (see Figure 52).
Check for correct location and fitting.
If necessary, remove pads (12) to inspect the
inner boots (9).
If necessary, repair caliper with suitable service
kit.
FIGURE 52: CHECKING OF GUIDE PIN AND SEALS
16.2.11 Checking Sealing Elements – Tappets
and Boot Assemblies
Remove pads (12) (refer to Knorr-Bremse
Pneumatic Disc Brake Y006471 Service
Manual).
Screw out the tappets (13) using the shear
adapter (61) clockwise until the boots are clearly
visible (see Figure 53).
The tappets must not be extended more
than 1.181 in / 30 mm, otherwise
synchronization is lost and the caliper
must be replaced.
FIGURE 53: SCREW OUT TAPPETS - MAX. 1.181 IN / 30
MM
The rubber boots on the tappets (13) must
not have any cuts/tears or show any other
signs of damage. Check for correct location
and fitting.
FIGURE 54: CHECK RUBBER BOOTS FOR DAMAGE
Note: The penetration of dirt and moisture into
the brake will lead to corrosion and impair the
function of the clamping mechanism and wear
adjuster.
If necessary replace tappet and boot assemblies
(refer to Knorr-Bremse Pneumatic Disc
Brake Y006471 Service Manual).
16.3 BRAKE PAD REPLACEMENT
Brake pad replacement procedure has slightly
changed with the introduction of the new N2G
adjuster on the vehicles.
The full wording of the processes is included in
the latest Knorr-Bremse service manual.
Refer to Knorr-Bremse Pneumatic Disc
Brake Y006471 Service Manual.

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