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TM 9-2320-364-20-3
2-2181
2-27. AIR SYSTEM TROUBLESHOOTING.
This paragraph covers Air System Troubleshooting. The Air System Fault Index, Table 2-52, lists faults for the air
system of the PLS truck. Refer to schematic Figures 2-50 and 2-51 when performing tests and corrective actions.
Table 2-52. Air System Fault Index
Fault No. Description
Page
1.
Air Pressure Buildup Is Slow
2-2184
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.
Air Dryer(s) And/Or Aftercooler Continually Purge
2-2198
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.
Compressor Fails To Unload (Air System Pressure Builds Up To More
Than 129 psi [889 kPa])
2-2204
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.
Noisy Air Compressor Operation
2-2208
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.
Air Pressure Drops Rapidly After Engine Shutdown
2-2214
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.
Air Horn Will Not Operate
2-2222
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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