AIR HORN - TM-9-2320-270-20-10235

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).

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