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TM 9-2320-364-20-3
2-2196
1. AIR PRESSURE BUILDUP IS SLOW (CONT).
8.
Does air discharge from left
and right air dryer discharge
ports?
Service or repair air
dryer (Para 12-21).
Verify repair, go to
Step 9 of this Fault.
YES
NO
Air cleaner OK.
Air dryer filters OK.
Coalescing filters OK.
Aftercooler filter OK.
Drain valves OK.
Air dryer and aftercooler purge
valves OK.
Air compressor inlet air line
OK.
Air compressor discharge air
line OK.
Check valves OK.
Air compressor OK.
Air governor OK.
Air dryer or aftercooler check
valve faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Air dryer test.
Air dryers may be defective if no
air escapes from discharge
ports.
WARNING
9.
Does air pressure buildup
normally?
Fault not corrected.
Notify DS
Maintenance.
YES
NO
Air cleaner OK.
Air dryer filters OK.
Coalescing filters OK.
Aftercooler filter OK.
Drain valves OK.
Air dryer and aftercooler purge
valves OK.
Air compressor inlet air line
OK.
Air compressor discharge air
line OK.
Check valves OK.
Air compressor OK.
Air governor OK.
Air dryer or aftercooler check
valve OK.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Verify repair.
If air pressure gage reads
125 4 psi (861 28 kPa) after
eight to ten minutes with engine
at idle, fault has been corrected.
Fault corrected.
Read WARNING
on Page 2-2197
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