Section 12: BRAKE AND AIR SYSTEM
2
X3-45 Commuter PA1593 DOB 2400-2489
Section 12 Updated Sept. 2015
16.
STOPLIGHT SWITCHES ................................................................................................................. 11
17.
PARKING BRAKE ALARM SWITCH .............................................................................................. 12
18.
BRAKE RELAY VALVE (R-12 & R-14) ........................................................................................... 12
19.
QUICK RELEASE VALVES (QR-1) ................................................................................................. 12
20.
SPRING BRAKE VALVE (SR-7)...................................................................................................... 12
21.
PRESSURE PROTECTION VALVE (PR-4) .................................................................................... 13
22.
LOW PRESSURE INDICATOR (LP-3) ............................................................................................ 13
23.
SHUTTLE-TYPE DOUBLE CHECK VALVE (DC-4) ....................................................................... 13
24.
EMERGENCY BI-FOLD ENTRANCE DOOR OPENING VALVES ................................................. 14
25.
AIR SYSTEM TROUBLESHOOTING .............................................................................................. 14
26.
BRAKE OPERATION ...................................................................................................................... 14
27.
AIR BRAKES ................................................................................................................................... 14
27.1
C
HECKING
D
ISC
B
RAKE
P
ADS
...................................................................................................... 15
27.1.1
Drive Axle – Equipped With a Solid Rubber Bushing and Exposed Guide Pin ..................... 15
27.1.2
Front and Tag Axle – Equipped With L-bracket Wear Indicator ............................................ 15
27.1.3
Vehicles Equipped with a Continuous Wear Sensor. ............................................................ 15
27.2
BRAKE
PADS
AND
DISCS
MINIMAL TOLERANCE LIMITS
.............................................................. 16
27.2.1
Brake Pads ............................................................................................................................ 16
27.2.2
Brake Disc ............................................................................................................................. 16
27.3
C
ALIPER
R
UNNING
C
LEARANCE
................................................................................................... 16
27.4
T
ORQUE SPECIFICATIONS
............................................................................................................ 17
28.
SAFE SERVICE PROCEDURES ..................................................................................................... 17
29.
AIR BRAKE TROUBLESHOOTING ................................................................................................ 18
30.
BRAKE AIR CHAMBER .................................................................................................................. 20
30.1
M
AINTENANCE
............................................................................................................................. 20
30.2
E
MERGENCY
/P
ARKING
B
RAKE
M
ANUAL
R
ELEASE
......................................................................... 21
30.3
BRAKE CHAMBER
R
EMOVAL
......................................................................................................... 21
30.4
BRAKE CHAMBER
I
NSTALLATION
................................................................................................... 21
30.5
BRAKE CHAMBER
D
ISASSEMBLY
................................................................................................... 21
31.
ANTI-LOCK BRAKING SYSTEM (ABS) ......................................................................................... 22
31.1
T
ROUBLESHOOTING AND
T
ESTING
................................................................................................ 22
31.2
ABS
COMPONENTS ................................................................................................................ 22
31.2.1
Electronic Control Unit (ECU) ................................................................................................ 23
31.2.2
ABS Modulator Valve ............................................................................................................. 23
31.2.3
Sensors ................................................................................................................................. 23
31.2.4
Spring clip .............................................................................................................................. 24
32.
FITTING TIGHTENING TORQUES ................................................................................................. 24
33.
SPECIFICATIONS ........................................................................................................................... 25
Summary of Contents for X3-45 2016
Page 4: ......
Page 16: ...Section 00 GENERAL INFORMATION PA1593 12 FIGURE 12 METRIC US STANDARD CONVERSION TABLE 00005...
Page 17: ...Section 00 GENERAL INFORMATION 13 PA1593 FIGURE 13 CONVERSION CHART 00006...
Page 18: ......
Page 26: ......
Page 58: ......
Page 72: ...Section 04 EXHAUST AND AFTERTREATMENT SYSTEM PA1593 14 7 TORQUE SPECIFICATIONS...
Page 73: ...SECTION 04 EXHAUST AND AFTERTREATMENT SYSTEM PA1593 15...
Page 74: ...Section 04 EXHAUST AND AFTERTREATMENT SYSTEM PA1593 16...
Page 76: ......
Page 96: ......
Page 134: ......
Page 176: ...SECTION 06B ELECTRICAL 38 overcurrent working Circuit 306 shorted to ground...
Page 180: ......
Page 202: ......
Page 205: ...Section 09 PROPELLER SHAFT PA1593 3 FIGURE 1 PROPELLER SHAFT ASSEMBLY 09002...
Page 256: ......
Page 268: ......
Page 295: ...SECTION 16 SUSPENSION PA1593 9 2 5 TORQUE SPECIFICATIONS...
Page 296: ...Section 16 SUSPENSION PA1593 10...
Page 297: ...Section 16 SUSPENSION PA1593 11...
Page 314: ......
Page 380: ......
Page 388: ......
Page 413: ...Section 22 HEATING AND AIR CONDITIONING PA1593 15 FIGURE 18 REFRIGERANT CIRCUIT CENTRAL SYSTEM...
Page 433: ...Section 22 HEATING AND AIR CONDITIONING PA1593 35 FIGURE 36 CENTRAL HEATING SYSTEM COMPONENTS...