TM 5-3805-248-23-1
BRAKE SYSTEM TROUBLESHOOTING PROCEDURES - CONTINUED
0014 00
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
5.
Retarder Does Not Engage
b. Shut down engine (TM 5-3805-248-
10).
- Continued.
c. Loosen retarder control valve
delivery line at air regulator (WP
d. While listening for air escaping,
1. If no air escapes, replace retarder
actuate retarder control valve.
2. If air escapes, go to Test 4.
4.
Check for air pressure at air hydraulic
retarder.
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 hydraulic retarder air line at
hydraulic retarder (WP 0289 00).
d. While listening for air escaping,
1. If no air escapes, replace hydraulic
actuate retarder control valve.
2. If problem still exists, replace air
3. Replace hydraulic retarder (WP 0289
00).
6.
Retarder Does Not
Release.
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 proper retarder control
valve action.
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 air does not exhaust, replace retarder
c. Operate retarder hand control and
listen for evidence of exhausting air
control valve (WP 0292 00).
(TM 5-3805-248-10).