TM 9-2320-273-20
Table 9-1. Compressed Air and Brake System Troubleshooting Procedures (Continued).
MALFUNCTION .
TEST OR INSPECTION .
CORRECTIVE ACTION .
16. PRESSURE GAGE(S) NOT INDICATING OR IS NOT ACCURATE, BRAKES NORMAL:
Step 1.
Disconnect affected air line(s) at gage(s) and press the brake pedal. If no air exhausts,
the line is clogged or broken.
Replace defective line or gage (para 9-20).
17. AIR HORN DOES NOT OPERATE:
Step 1.
Check for air LOW PRESSURE.
If air pressure is below 20 Ibs , operate engine until air pressure is back to 120 Ibs.
See Malfunction 1.
Step 2.
Inspect air lines for damage or clogging.
a.
Replace damaged or clogged lines.
b.
Replace defective manually-operated horn valve (para 9-45).
18. WINDSHIELD WIPERS OR WASHERS ARE INOPERATIVE:
Step 1.
Step 2.
Step 3.
Check for air leakage in lines to the wiper or washer control valve using a soap solution.
Tighten loose connections and replace damaged lines.
Check to see if the wiper mechanical linkage is binding or broken.
Replace defective linkage (para 9-42).
Loosen air line at the wiper motor and turn control to the run position. Air should
exhaust from the line.
a.
If no air exhausts, replace the control valve (para 9-43).
b.
If air exhausts, replace the motor (para 9-42).
9-9
