TM 9-2320-260-20
Table 2-3. Compressed Air and Air-Hydraulic Brake System Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 3. Connect windshield wiper motor supply line (1) to adapter (3) with clamp (2).
Step 4. Start engine (TM 9-2320-260-10) and allow air pressure to build to normal operating
pressure.
Step 5. Operate windshield wipers to full on position (TM 9-2320-260-10).
Step 6. Check reading on test gage (49.
a. If reading is lower than 55 psi (379 kPa), replace windshield wiper valve (para. 11-38).
b. If reading is 55 psi (379 kPa), perform test 2.
Test 2. Check windshield wiper motor (6) for clogs.
Step 1. Remove clamp (7) and hose (8) from windshield wiper motor (6).
Step 2. Using wire, clean orifice (5) on windshield wiper motor (6).
Step 3. Install hose (8) and clamp (7) on windshield wiper motor (6).
Step 4. Start engine (TM 9-2320-260-10) and allow air pressure to build up to normaloperating
pressure.
Step 5. Operate windshield wipers (TM 9-2320-260-10). If windshield wipers are still inoperative,
replace defective windshield wiper motor(s) (5) (para. 11-37).
END OF' TESTING!
16. AIR HORN DOES NOT WORK
Step 2. If malfunction still exists, refer to malfunction 11, steps 1-8.
NOTE
Air gage on instrument panel has a maximum pressure scale
of 120 psi (4 kPa). If old governor has been replaced with new
governor, air pressure may exceed maximum pressure reading on
instrument panel.
If air gage on instrument panel indicates proper air pressure, replace air horn (para. 4-30).
END OF TESTING!
2-95
