TM 5-3805-248-23-1
BRAKE SYSTEM TROUBLESHOOTING PROCEDURES - CONTINUED
0014 00
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
5.
Retarder Does Not Engage.
WARNING
Eye protection must be worn when performing maintenance where components
or particles could fly out during procedure. Failure to take precautions may
cause injury.
Make sure wheels are chocked and bowl is lowered to ground for all tests. Fail-
ure to do so may cause injury or death.
1.
Check for air pressure to supply port
of retarder control valve.
If air pressure does not build, go to
a. Run engine and allow air pressure to
reach normal operating range (TM
Malfunction 7.
5-3805-248-10).
b. Shut down engine (TM 5-3805-248-
10).
1. If no air escapes, replace retarder
c. Loosen retarder control valve
supply line at retarder control valve
control valve supply line (WP 0141 00).
and listen for air escaping (WP 0292
2. If still no air escapes, replace brake
00).
control valve (WP 0155 00).
3. If air escapes, go to Test 2.
2.
Check for air pressure to retarder
valve delivery 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. Loosen retarder control valve
delivery line at retarder control
valve.
d. Actuate retarder control valve and
1. If no air escapes, replace retarder
listen for air escaping.
control valve (WP 0292 00).
2. If air escapes, go to Test 3.
3.
Check for air pressure at air regulator.
a. Run engine and allow air pressure to
reach normal operating range (TM
5-3805-248-10).
