TM 5-3895-370-14&P
Table 4-4. Unit Troubleshooting Procedures - CONT.
Malfunction
Test or inspection
Corrective action
BRAKE SYSTEM (CONT)
30.
PARKING BRAKES DO NOT APPLY OR APPLY SLOWLY (CONT).
Step 3. Inspect emergency air hose at ratio relay valve.
If air hose is damaged, replace air hose (para 4-105).
If air hose is not damaged, go to step 4.
Step 4. Inspect operation of brake chamber.
If brake chamber rod does not go back in chamber smoothly, notify DS maintenance.
If brake chamber rod goes back in chamber smoothly, go to step 5.
Step 5. Check pressure on service air hose at ratio relay valve.
If air pressure does not rapidly decrease when emergency air supply is off, replace ratio
relay valve (para 4-104).
If air pressure rapidly decreases when emergency air supply is off, go to step 6.
Step 6. Inspect slack adjuster operation and check adjustment.
If slack adjuster is damaged or not adjusted properly, notify DS maintenance.
If slack adjuster is not damaged and adjusted properly, go to step 7.
Step 7. Inspect brake components for damage.
If brake components are damaged, replace damaged components (para 4-97).
If brake components are not damaged, fault not corrected. Notify supervisor.
31.
SERVICE BRAKES DO NOT APPLY OR APPLY SLOWLY.
Step 1. Inspect that brakes are not caged.
If brakes are caged, uncage brakes (para 4-98).
If brakes are not caged, go to step 2.
Step 2. Inspect service gladhand and air hoses for looseness and damage.
If gladhand or air hoses are leaking or damaged, Tighten gladhand or replace gladhand
and/or air hose (para 4-106/4-105).
If gladhand and air hoses are not damaged or leaking, go to step 3.
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