PREVOST LE MIRAGE XLII BUS SHELLS User Manual

Section 12: BRAKE AND AIR SYSTEM
PA1553
23
Excessive leakage on brake service side:
o With the primary air system at normal
operating pressure (95 - 125 psi (655 -
860 kPa)) and foot brake applied, coat all air
line connections and brake pneumatic
components with a water and soap solution.
Bubbles will indicate an air leak, and none
should be permissible. Repair or replace
defective parts.
o Listen for leaks and correct as required.
o Redo test to check all items repaired or
replaced.
IMPORTANT NOTE
To maintain your vehicle’s air disc brakes at
their original performance standard, we
strongly recommend use of only genuine,
approved service replacement parts on Bendix
and Knorr-Bremse air disc brake systems. If
non-approved friction materials or
replacement components are used, neither
Prévost Car nor Bendix Spicer Foundation
Brake LLC will accept any air disc brake-
related warranty returns or claims.
For more information on this policy, refer to
Bendix-Prévost product notification annexed
at the end of Section 12 of Maintenance
Manual.
28. BRAKE AIR CHAMBER
Since this vehicle is equipped with Knorr-
Bremse SN7000 disc brakes on all axles, it also
uses “Knorr-Bremse” brake chambers. The tag
and drive axle chambers consist of two separate
air chambers, each having its own diaphragm
and push rod. They are used as a service brake
chamber, an emergency brake in case of air
pressure loss and a spring-applied parking
brake. Refer to figures 40 and 41.
The front wheel brake air chambers are used
only for service brake duty (Fig. 40).
FIGURE 40: FRONT WHEEL BRAKE AIR CHAMBER 12158
28.1 MAINTENANCE
Every 6,250 Miles (10 000 km) or twice a year,
whichever comes first depending on type of
operation:
FIGURE 41: TAG AXLE BRAKE AIR CHAMBER 12126
Check all hoses and lines. They should be
secure and in good condition.
Every 100,000 Miles (160 000 km) or once a
year, whichever comes first depending on
type of operation:
1. Disassemble and clean all parts.
2. Install new diaphragm or any other part if
worn or deteriorated.

PREVOST LE MIRAGE XLII BUS SHELLS Specifications

General

Brand	PREVOST
Model	LE MIRAGE XLII BUS SHELLS
Category	Buses
Language	English