Section 12: BRAKE AND AIR SYSTEM
PA1564
5
1. AIR
SYSTEM
The basic air system consists of an air
compressor, reservoirs, valves, filters and
interconnecting lines and hoses. It provides a
means for braking; operating controls and
accessories, and suspension (refer to Section
16,
"Suspension"
, for complete information on
suspension description and maintenance). An
air system schematic diagram is annexed in the
technical publications box provided with the
vehicle for better understanding of the system.
2. BRAKES
This vehicle uses both the service brake and
emergency/parking brake. The service brake air
system is divided into two independent circuits
to isolate front brakes from rear brakes, thus
providing safe breaking in the event that one
circuit fails. Front axle brakes operate from the
secondary air system, while brakes on both the
drive axle and tag axle operate from the primary
air system.
NOTE
The tag axle service brake operates only
when the axle is in normal ride position
(loaded and down).
Furthermore, the brake application or release,
which is speed up by a pneumatic relay valve (R-
12), will start with the rear axles and will be
followed by the front axle, thus providing uniform
braking on a slippery road. The vehicle is also
equipped with an Anti-Lock Braking System
(ABS), which is detailed later in this section.
The drive and tag axles are provided with spring-
loaded emergency/parking brakes, which are
applied automatically whenever the control valve
supply pressure drops below 40 psi (275 kPa).
3. AIR
RESERVOIRS
The air coming from the air dryer is first
forwarded to the wet air tank, then to the primary
(for the primary brake system), secondary (for
the secondary brake system), and accessory
(for the pneumatic accessories) air tanks
(Fig. 1).
3.1 MAINTENANCE
Ensure that the wet (main) air tank is purged
during pre-starting inspection. In addition, it is
good practice to purge this reservoir at the end
of every driving day. The remaining reservoirs
must be purged at every 12,500 miles (or 20 000
km) or once every year, whichever comes first.
3.1.1 Wet (Main) Air Tank
This reservoir, located above the L.H. wheel of
drive axle in the rear wheelhousing, is provided
with a bottom drain valve. A recommended
purge using the bottom drain valve should be
done at the end of every driving day.
FIGURE 1: AIR RESERVOIRS LOCATION
24037
Содержание LE MIRAGE XLII BUS SHELLS
Страница 1: ...COACH MANUFACTURER MAINTENANCE MANUAL LE MIRAGE XLII BUS SHELLS PA1564 1ST EDITION...
Страница 12: ...Section 00 GENERAL INFORMATION 10 PA1564 FIGURE 13 METRIC US STANDARD CONVERSION TABLE 00005...
Страница 13: ...Section 00 GENERAL INFORMATION PA1564 11 FIGURE 14 CONVERSION CHART 00006...
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Страница 380: ...Section 12 BRAKE AND AIR SYSTEM PA1564 22 FIGURE 39 AIR OPERATED BRAKING SYSTEM W5...
Страница 387: ...Section 12 BRAKE AND AIR SYSTEM PA1564 29 FIGURE 46 ABS 6S 5M CONFIGURATION...
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Страница 1083: ...Section 22 HEATING AND AIR CONDITIONING PA1564 15 FIGURE 16 REFRIGERANT CIRCUIT CENTRAL SYSTEM 22247...
Страница 1086: ...Section 22 HEATING AND AIR CONDITIONING PA1564 18 FIGURE 17 DOUBLE SWEEP EVACUATION SET UP...
Страница 1106: ...Section 22 HEATING AND AIR CONDITIONING PA1564 38 FIGURE 39 REFRIGERANT CIRCUIT SMALL SYSTEM 22350...
Страница 1108: ...Section 22 HEATING AND AIR CONDITIONING PA1564 40 FIGURE 42 CENTRAL HEATING SYSTEM COMPONENTS 22338...
Страница 1118: ...Section 22 HEATING AND AIR CONDITIONING PA1564 50 FIGURE 54 HEATER LINE SHUTOFF VALVES WE...
Страница 1119: ...Section 22 HEATING AND AIR CONDITIONING PA1564 51 FIGURE 55 SMALL HEATING SYSTEM COMPONENTS 22337...
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Страница 1205: ...Section 24 LUBRICATION PA1564 5 FIGURE 1 LUBRICATION AND SERVICING POINTS ON INDEPENDENT FRONT SUSPENSION VEHICLES 24036_1...
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Страница 1224: ...Section 26 XLII SLIDE OUT PA1564 12 FIGURE 16 KEYLESS BUSHING INSTALLATION INSTRUCTION...