TM 9-2320-365-20-2
2-1734
1.
Check Temperature
Air dryer purge valve may
freeze open if temperature
is below freezing and air
dryer heater does not work.
Is air temperature
32°F (O°C) or below?
START
YES
NO
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
j3. AIR DRYER CONTINUALLY PURGES
INITIAL SETUP
Equipment Conditions
Engine shut down (TM 9-2320-365-10).
Air hoses and fittings OK.
Faulty air dryer heater.
Blocked air hose from air
dryer to wet tank.
Faulty air dryer.
Faulty air compressor
governor.
Does air dryer
heater operate?
Check Heater Temperature
2.
Air may leak steadily
from purge valve if purge
valve is frozen and heater
does not operate.
NO
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Air hoses and fittings OK.
Faulty air dryer heater.
Blocked air hose from air
dryer to wet tank.
Faulty air dryer.
Faulty air compressor
governor.
YES
Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
Goggles, Industrial (Item 15, Appendix C)
Go to step 3 of this fault.
Perform Electrical System
Troubleshooting (e97. Air
Dryer Does Not Operate).
