Section 12: BRAKE AND AIR SYSTEM
PA1562
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 braking 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 axle is 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
& 2).
Two additional air reservoirs may be installed on
the vehicle: the kneeling air tank and ZF
transmission air tank.
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 working day. The remaining reservoirs
must be purged at every 12,500 miles (or 20 000
km) or once every year, whichever comes first.
FIGURE 1: IFS AIR RESERVOIRS LOCATION
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Summary of Contents for X3-45 Multiplex
Page 1: ...COACH MANUFACTURER MAINTENANCE MANUAL X3 COACHES PA1562 4th edition...
Page 13: ...Section 00 GENERAL INFORMATION 11 PA1562 FIGURE 16 METRIC US STANDARD CONVERSION TABLE 00005...
Page 14: ...Section 00 General Information PA1562 12 FIGURE 17 CONVERSION CHART 00006...
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Page 253: ...FAULT CODE MANUAL Created on 00 04 25 15 30 1 FAULT CODE MANUAL B7L B7TL B12...
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Page 439: ...Forward and Rear Axle Carrier Diagnostic Flowcharts TP 99125 Issued 12 99 TECHNICAL BULLETIN...
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Page 500: ...Notes Copyright 2002 Maintenance Manual MM 0204 Page 4 ArvinMeritor Inc Issued 08 02...
Page 504: ...Notes Copyright 2002 Maintenance Manual MM 0204 Page 8 ArvinMeritor Inc Issued 08 02...
Page 526: ...16 BW2158 Honeywell Commercial Vehicle Systems Company 4 2001 Printed in USA...
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Page 941: ...Initial Installation Section 2 Initial Installation Installation 14 Maintenance Tips 15...
Page 965: ...Glossary Section 5 Glossary Glossary 39...
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Page 1197: ...Compressor 62 11052 Rev A WORKSHOP MANUAL for MODEL 05G TWIN PORT COMPRESSOR R...
Page 1198: ...WORKSHOP MANUAL COMPRESSOR MODEL 05G TWIN PORT...
Page 1221: ...Compressor 62 11053 Rev B SERVICE PARTS LIST for MODEL 05G TWIN PORT COMPRESSOR 1 2 3 4 5 6 R...
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Page 1265: ...Section 23 ACCESSORIES PA1562 5 FIGURE 2 AUDIO VIDEO CONNECTIONS...
Page 1278: ...Section 23 ACCESSORIES PA1562 18 FIGURE 26 FUNCTIONING OF LAVATORY 23051...
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Page 1379: ...LPCM OUTPUT...
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