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TM9-2320-270-20-1
TROUBLESHOOTING - CONTINUED
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
AIR HORN
69. AIR HORN DOES NOT WORK.
Step 1.
Start engine and build air pressure to operating level (TM 9-2320-270-10).
Shut down engine (TM 9-2320-270-10). Check for damage or leaks in air hose
no. 039 from horn (1) to valve (2) by listening for hissing or using soap
solution and watching for bubbles (page 4-1).
If hoses are damaged or leaking, repair or replace (page 4-1260).
Step 2.
Take off hose no. 039 (3) at air horn valve (2). Apply known air supply
to end of hose.
a. If horn does not sound, replace (page 4-1251).
b. If horn does sound, replace horn air valve (page 4-1244).
3-173

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