SECTION 16: SUSPENSION
2
DOB 2490-2789 | X3-45 Commuter PA1605 Maintenance Manual (Section 16 revised April 2019)
8.1.6
Parking
Brakes
Overrule
Air
Tank
........................................................................................................
21
8.2
EMERGENCY
FILL
VALVES
............................................................................................................................
22
9.
FRONT
KNEELING
SYSTEM
.........................................................................................................................
22
9.1
PRINCIPLE
OF
OPERATION
...........................................................................................................................
22
9.2
MAINTENANCE
............................................................................................................................................
22
9.3
BELLOWS
CONTROL
SOLENOID
VALVES
......................................................................................................
23
9.3.1
Removal
and
installation
.....................................................................................................................
23
10.
TROUBLESHOOTING
...............................................................................................................................
23
11.
SECTION
CHANGE
LOG
...........................................................................................................................
24
ILLUSTRATIONS
FIGURE 1: FRONT I-BEAM AXLE SUSPENSION ....................................................................................... 3
FIGURE 2: AIR SPRING
........................................................................................................................... 3
FIGURE 3: AIR SPRING UPPER MOUNTING PLATE ................................................................................ 4
FIGURE 4: SHOCK ABSORBER .................................................................................................................. 5
FIGURE 5: BALL PIN JOINT CONSTRUCTION .......................................................................................... 6
FIGURE 6: BALL PIN BUSHING .................................................................................................................. 6
FIGURE 7: SWAY BAR ................................................................................................................................. 8
FIGURE 8: REAR SUSPENSION COMPONENTS .................................................................................... 12
FIGURE 9: SWAY BAR (REAR SUSPENSION)
....................................................................................... 12
FIGURE 10: TAG AXLE SUSPENSION ..................................................................................................... 12
FIGURE 11: AIR SPRING ........................................................................................................................... 13
FIGURE 12: TYPICAL SHOCK ABSORBER SETUP ................................................................................ 15
FIGURE 13: TORQUE SPECIFICATIONS – DRIVE AXLE ........................................................................ 16
FIGURE 14: TORQUE SPECIFICATIONS – DRIVE AXLE ........................................................................ 16
FIGURE 15: TORQUE SPECIFICATIONS – TAG AXLE ........................................................................... 17
FIGURE 16: TORQUE SPECIFICATIONS – TAG AXLE ........................................................................... 17
FIGURE 17: FRONT I-BEAM AXLE AIR SPRING CLEARANCE .............................................................. 19
FIGURE 18: DRIVE AXLE AIR SPRING CLEARANCE ............................................................................. 19
FIGURE 19: TAG AXLE AIR SPRING CLEARANCE ................................................................................. 19
FIGURE 20: FRONT HEIGHT CONTROL VALVE ..................................................................................... 19
FIGURE 21: REAR HEIGHT CONTROL VALVE........................................................................................ 20
FIGURE 22: I-BEAM FRONT SUSPENSION AIR TANKS LOCATION ..................................................... 21
FIGURE 23: REAR VALVE LOCATION ..................................................................................................... 22
FIGURE 24: FRONT SERVICE COMPARTMENT ..................................................................................... 22
