TM 5-3805-254-20-1
ORGANIZATIONAL TROUBLESHOOTING - CONTINUED
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
72.
BOTH WINDSHIELD WIPERS DO NOT WORK.
WARNING
Safety goggles must be worn when working with air lines to prevent personal injury.
NOTE
Check AIR PRESSURE gage for air pressure between 90 and 130 psi. If specified air pressure is
not present, start engine and check that air pressure in air system is between 90 and 130 psi (TM
5-3805-254-10). Shut down engine (TM 5-3805-254-10).
Step 1.
Check air manifold (1) for output air pressure as follows: using 5/8-inch opened wrench, loosen
output line fitting (2) six turns. Listen for hissing noise.
a. If hissing noise is not heard, notify Direct Support Maintenance.
b. If hissing noise is heard, tighten output line fitting (2) using 5/8inch open-end wrench.
Go to step 2.
Step 2.
Check elbow (3) for input air pressure as follows: using 518-inch open-end > wrench, loosen input
line fitting (4) six turns. Listen for hissing noise.
a. If hissing noise is not heard, replace air line (5). Using 5/8-inch open-end wrench,
unscrew and take off input line fitting (4) and output line fitting (2). Screw on and
tighten input line fitting (4) and output line fitting (2) using 5/8-inch open-end wrench.
b. If hissing noise is heard, go to step 3.
Step 3.
Check windshield WIPER control (6) for input air pressure as follows: using 5/8inch open-end
wrench, loosen input line fitting (7) six turns. Listen for hissing noise.
a. If hissing noise is not heard, replace air line (8). Using 5/8-inch open-end wrench,
unscrew and take off input line fitting (7) and output line fitting (9). Screw on and
tighten input line fitting (7) and output line fitting (9) using 5/8-inch open-end wrench.
b. If hissing noise is heard, go to step 4.
Step 4.
Check windshield wiper control (6) for output air pressure as follows: using 9/16-inch open-end
wrench, loosen output line fitting (10) six turns. Turn windshield WIPER control knob (11) clockwise
to on position, and listen for hissing noise.
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