TM 5-3805-248-23-1
BRAKE SYSTEM TROUBLESHOOTING PROCEDURES - CONTINUED
0014 00
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. If no air is released, there is a restriction.
1.
Service Brakes Do Not
d. Loosen service brake supply line at
relay valve (WP 0159 00 and WP
Unblock or replace scraper service
Apply - Continued.
brake supply line (WP 0165 00) or
tractor service brake supply line
between operator compartment and air
brake relay valve (WP 0163 00).
2. If problem still exists, go to Test 5.
5.
Check for leak in brake signal line(s).
a. Run engine and allow air pressure to
reach normal operating range (TM
5-3805-248-10).
b. Shut down engine (TM 5-3805-248-
10).
c. Release park and emergency brakes
(TM 5-3805-248-10).
d. Apply and hold brakes. Listen for air
1. If leak exists, replace leaking brake
leak brake signal line(s).
signal line(s) (WP 0161 00 and WP
2. If problem still exists, go to Test 6.
6.
Check for restriction in brake signal
line.
a. Run engine and allow air pressure to
reach normal operating range (TM
5-3805-248-10).
b. Shut down engine (TM 5-3805-248-
10).
c. Release park and emergency brakes
(TM 5-3805-248-10).
d. Loosen brake signal line at air brake
relay valve (WP 0159 00 and WP
0014 00-4
