SECTION 12: BRAKE AND AIR SYSTEM
2
DOB 2490-2789 | X3-45 Commuter PA1605 Maintenance Manual (Final Version – Rev.2 April 2016)
16.
PARKING BRAKE ALARM SWITCH .............................................................................................. 14
17.
BRAKE RELAY VALVE (R-14) ....................................................................................................... 14
18.
ANTILOCK TRACTION RELAY VALVES (ATR-6) ........................................................................ 14
19.
SPRING BRAKE VALVE (SR-7) ..................................................................................................... 14
20.
PRESSURE PROTECTION VALVE (PR-4) .................................................................................... 15
21.
SHUTTLE-TYPE DOUBLE CHECK VALVE (DC-4) ....................................................................... 15
22.
EMERGENCY BI-FOLD ENTRANCE DOOR OPENING VALVES ................................................ 15
23.
AIR SYSTEM TROUBLESHOOTING .............................................................................................. 16
24.
BRAKE OPERATION ...................................................................................................................... 16
25.
DISC BRAKES ................................................................................................................................. 17
25.1
INSPECTION POINTS ................................................................................................................. 17
25.2
PAD REPLACEMENT PROCEDURE .......................................................................................... 18
25.3
CHECKING DISC BRAKE PADS ................................................................................................. 18
25.3.1
Drive Axle – Equipped With L-bracket Wear Indicator .......................................................... 18
25.3.2
Front and Tag Axle – Equipped With L-bracket Wear Indicator ............................................ 19
25.3.3
Continuous Wear Sensor. ..................................................................................................... 20
25.4
BRAKE PADS AND DISCS MINIMAL TOLERANCE LIMITS ...................................................... 20
25.4.1
Brake Pads ............................................................................................................................ 20
25.4.2
Brake Disc ............................................................................................................................. 20
25.5
CALIPER RUNNING CLEARANCE ............................................................................................. 21
25.6
TORQUE SPECIFICATIONS ....................................................................................................... 21
26.
SAFE SERVICE PROCEDURES .................................................................................................... 21
27.
AIR BRAKE TROUBLESHOOTING ................................................................................................ 23
28.
BRAKE AIR CHAMBER .................................................................................................................. 24
28.1
MAINTENANCE ............................................................................................................................ 24
28.2
EMERGENCY/PARKING BRAKE MANUAL RELEASE .............................................................. 25
28.3
BRAKE CHAMBER REMOVAL AND INSTALLATION ................................................................ 25
28.4
BRAKE CHAMBER DISASSEMBLY ............................................................................................ 26
29.
ANTI-LOCK BRAKING SYSTEM (ABS) ......................................................................................... 26
29.1
TROUBLESHOOTING AND TESTING ........................................................................................ 27
29.2
ABS COMPONENTS .................................................................................................................... 27
29.3
BENDIX EC-60 ADVANCED CONTROLLER .............................................................................. 27
29.4
SENSORS .................................................................................................................................... 27
29.5
SPRING CLIP ............................................................................................................................... 28
30.
BENDIX AUTOMATIC TRACTION CONTROL (ATC) – ELECTRONIC STABILITY CONTROL
(ESC) 28
30.1
COMPONENTS ............................................................................................................................ 29
30.1.1
The EC-60
TM
controller’s ABS function utilizes the following components: .......................... 29
30.1.2
The EC-60
TM
controller’s ATC function utilizes the following components: .......................... 29
30.1.3
The EC-60
TM
controller’s ESC/RSP function utilizes the following components: .................. 29
30.2
BENDIX M-40QR PRESSURE MODULATOR VALVE ................................................................ 29
30.3
ADVANCED ABS WITH ELECTRONIC STABILITY CONTROL (ESC) ...................................... 30
30.4
BENDIX
®
SAS-70 STEERING ANGLE SENSOR ........................................................................ 31
30.4.1
Removal of the steering angle sensor ................................................................................... 31
31.
FITTING TIGHTENING TORQUES ................................................................................................. 32
32.
SPECIFICATIONS ........................................................................................................................... 33