5
Table of Contents
Chapter 5– Suspension .......................................139
General Information ............................................................................................. 139
Air Springs ............................................................................................................ 140
Shock Absorbers .................................................................................................. 143
Ride Height Adjustment ....................................................................................... 146
Front Suspension ................................................................................................. 149
Rear Suspension .................................................................................................. 151
Rear Axle Alignment ..........................................................................................
156
Suspension Troubleshooting .............................................................................. 157
Front Axle .............................................................................................................. 159
Axle Overhaul ....................................................................................................... 162
Steering Linkage ................................................................................................... 163
Front End Alignment ............................................................................................ 168
Front Axle Troubleshooting ................................................................................
172
Steering Column ................................................................................................... 174
Chapter 6– Air System .........................................183
Air System Operation ........................................................................................... 183
Suspension Air System Operation ..................................................................... 186
Kneeling System Operation ................................................................................. 188
Door Control Operation ...................................................................................... 190
Air Compressor .................................................................................................... 193
Maintenance ......................................................................................................
195
Compressor Removal and Installation ...............................................................
197
Performance Testing .........................................................................................
199
Troubleshooting .................................................................................................
200
Air Governor (Bendix D-2) ................................................................................... 203
Preventive Maintenance ....................................................................................
203
Air Reservoirs ....................................................................................................... 208
Valves and Pressure Switches ............................................................................ 209
Safety Valve .......................................................................................................
209
Check Valves .....................................................................................................
211
Air Lines .............................................................................................................
213
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