PA1621 Maintenance Manual All Series | January 2017
CONTENTS
SECTION CHANGE LOG ........................................................................................................................................... 4
1 TORQUE TABLES ............................................................................................................................................. 5
1.1 FRONT I-BEAM AXLE AND RELATED COMPONENTS ...................................................................................... 5
1.2 INDEPENDENT FRONT SUSPENSION .............................................................................................................. 7
1.3 REAR SUSPENSION ......................................................................................................................................... 9
2 DESCRIPTION ................................................................................................................................................ 14
3 FRONT I-BEAM AXLE SUSPENSION ................................................................................................................ 14
3.1 AIR SPRINGS ................................................................................................................................................. 14
3.1.1 Inspection ............................................................................................................................................. 14
3.1.2 Removal ............................................................................................................................................... 14
3.1.3 Installation ........................................................................................................................................... 15
3.2 SHOCK ABSORBERS ...................................................................................................................................... 15
3.2.1 Inspection ............................................................................................................................................. 16
3.2.2 Removal ............................................................................................................................................... 16
3.2.3 Installation ........................................................................................................................................... 17
3.3 RADIUS RODS ............................................................................................................................................... 17
3.3.1 Inspection ............................................................................................................................................. 17
3.3.2 Radius Rod Removal ............................................................................................................................ 18
3.3.3 Stripping Down .................................................................................................................................... 19
3.3.4 Radius Rod Assembly ........................................................................................................................... 19
3.3.5 Radius Rod Installation ........................................................................................................................ 19
3.4 SWAY BAR .................................................................................................................................................... 19
3.4.1 Removal ............................................................................................................................................... 19
3.4.2 Installation ........................................................................................................................................... 19
4 INDEPENDENT FRONT SUSPENSION (IFS) ...................................................................................................... 20
4.1 STEERING LINKAGE ...................................................................................................................................... 20
4.2 STEERING LINKAGE INSTALLATION SEQUENCE ............................................................................................ 23
4.3 PITMAN ARM ............................................................................................................................................... 23
4.3.1 Removal ............................................................................................................................................... 23
4.3.2 Installation ........................................................................................................................................... 23
4.4 DRAG LINK .................................................................................................................................................... 24
4.4.1 Adjustment........................................................................................................................................... 24
4.5 BELL CRANK AND IDLER ARM ....................................................................................................................... 24
4.5.1 Bell Crank or Idler Arm Removal .......................................................................................................... 24
4.5.2 Bell crank or Idler Arm Hub Disassembly ............................................................................................. 25
4.5.3 Bell Crank or Idler Arm Hub Reassembly .............................................................................................. 25
4.6 RELAY ROD ................................................................................................................................................... 26
4.6.1 Replacement ........................................................................................................................................ 26
4.7 TIE RODS ...................................................................................................................................................... 26
4.7.1 Removal ............................................................................................................................................... 26
4.7.2 Installation ........................................................................................................................................... 27
4.8 STEERING ARMS ........................................................................................................................................... 27
4.8.1 Removal ............................................................................................................................................... 28
4.8.2 Installation ........................................................................................................................................... 28
4.9 LUBRICATION FITTINGS ................................................................................................................................ 30
4.10 BALL JOINTS – GENERAL RECOMMENDATIONS ........................................................................................... 31
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