SECTION 12: BRAKE AND AIR SYSTEM
DOB 2490-2789 | X3-45 Commuter PA1605 Maintenance Manual (Final Version – Rev.2 April 2016)
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33.
SECTION CHANGE LOG ................................................................................................................ 33
ILLUSTRATIONS
FIGURE 1: I-BEAM FRONT SUSPENSION AIR RESERVOIRS LOCATION…… ...................................... 4
FIGURE 2: WET TANK AUTOMATIC DRAIN VALVE .................................................................................. 5
FIGURE 3: EMERGENCY AIR SYSTEM FILL VALVES AND DRAIN COCK .............................................. 5
FIGURE 4: FRONT SERVICE COMPARTMENT…… .................................................................................. 6
FIGURE 5: ACCESSORY AIR FILTER ........................................................................................................ 6
FIGURE 6: AIR DRYER….. .......................................................................................................................... 7
FIGURE 7: AIR DRYER LOCATION ............................................................................................................ 7
FIGURE 8: WABCO AIR DRYER CONNECTIONS ..................................................................................... 8
FIGURE 9: FITTINGS DIRECTION .............................................................................................................. 8
FIGURE 10: DESICCANT CARTRIDGE REPLACEMENT .......................................................................... 9
FIGURE 11: HALDEX CONSEP CONDENSER SEPARATOR ................................................................... 9
FIGURE 12: AIR PRESSURE REGULATING VALVE….. .......................................................................... 11
FIGURE 13: AIR COMPRESSOR LOCATION….. ..................................................................................... 12
FIGURE 14: PP-1….. .................................................................................................................................. 12
FIGURE 15: RD-3….. .................................................................................................................................. 13
FIGURE 16: TW-1….. ................................................................................................................................. 13
FIGURE 17: E-8P DUAL BRAKE VALVE .................................................................................................. 13
FIGURE 18: BRAKE PEDAL ADJUSTMENT….. ........................................................................................ 13
FIGURE 19: PINS ....................................................................................................................................... 13
FIGURE 20: R-14….. .................................................................................................................................. 14
FIGURE 21: ATR-6….. ................................................................................................................................ 14
FIGURE 22: SR-7….. .................................................................................................................................. 15
FIGURE 23: PR-4….. .................................................................................................................................. 15
FIGURE 24: DC-4….. .................................................................................................................................. 15
FIGURE 25: THREE-WAY VALVE….. ........................................................................................................ 15
FIGURE 26: BRAKE COMPONENTS ........................................................................................................ 18
FIGURE 27: BRAKE PAD WEAR CHECK ON DRIVE AXLE ..................................................................... 19
FIGURE 28: PAD WEAR CHECK FRONT AND TAG AXLE ...................................................................... 19
FIGURE 29: PAD WEAR CHECK FRONT AND TAG AXLE ...................................................................... 19
FIGURE 30: POTENTIOMETER ................................................................................................................ 20
FIGURE 31: MINOR BREAKOUTS AT THE EDGES ARE PERMITTED .................................................. 20
FIGURE 32: MAJOR BREAKOUTS ON THE SURFACE OF THE BRAKE PAD ARE NOT PERMITTED 20
FIGURE 33: BRAKE PAD DIMENSIONS ................................................................................................... 20
FIGURE 34: CALIPER AXIAL DIRECTION ................................................................................................ 21
FIGURE 35: CALIPER CARRIER MOUNTING BOLTS TORQUE SPECIFICATION - I-BEAM AXLE ...... 21
FIGURE 36: CALIPER CARRIER MOUNTING BOLTS TORQUE SPECIFICATION - ZF A132 DRIVE
AXLE .................................................................................................................................................... 21
FIGURE 37: CALIPER CARRIER MOUNTING BOLTS TORQUE SPECIFICATION - TAG AXLE ........... 21
FIGURE 38: FRONT AXLE BRAKE AIR CHAMBER ................................................................................. 24
FIGURE 39: DRIVE AXLE BRAKE AIR CHAMBER….. ............................................................................. 24
FIGURE 40: TYPICAL AIR CHAMBER MOUNTING NUTS TORQUE – ZF A132 DRIVE AXLE SHOWN 25
FIGURE 41: ABS ECU LOCATION….. ....................................................................................................... 27
FIGURE 42: ABS SENSOR LOCATION….. ............................................................................................... 28
FIGURE 43: SPRING CLIP….. ................................................................................................................... 28
FIGURE 44: M-40QR PRESSURE MODULATOR VALVE ........................................................................ 30
FIGURE 45: HOSE FITTING….. ................................................................................................................. 32
