TM 5-3895-370-14&P
Table 4-4. Unit Troubleshooting Procedures - CONT.
Malfunction
Test or inspection
Corrective action
BRAKE SYSTEM (CONT)
Step 3. Check pressure at pressure protection valve.
If pressure is not 70 ±5 psi (483 ±34 kPa), replace pressure protection valve (para 4-100).
If pressure is 70 +5 psi (483 +34 kPa), go to step 4.
Step 4. Inspect air hose from pressure protection valve to service air tank for damage.
If air hose is damaged, replace air hose (para 4-105).
If air hose is not damaged, go to step 5.
Step 5. Inspect service air tank for leaks.
If service air tank is damaged, replace tank (para 4-99).
If service air tank is not damaged, go to step 6.
Step 6. Check air pressure on air hose to service brake chamber at relay valve.
If pressure is not 60 ±5 psi (414 +34 kPa) when brakes are applied, replace air relay valve
(para 4-102).
If pressure is 60 ±5 psi (414 ±34 kPa) when brakes are applied, fault not corrected.
Notify supervisor.
32.
SERVICE BRAKES DO NOT RELEASE OR RELEASE SLOWLY.
Step 1. Inspect air hose of suspect brake chamber for damage.
If air hose is damaged, replace air hose (para 4-105).
If air hose is not damaged, go to step 2.
Step 2. Inspect operation of brake chamber.
If brake chamber rod does not go back in chamber smoothly, replace notify DS
maintenance.
If brake chamber rod goes back in chamber smoothly, go to step 3.
Step 3. Inspect relay valve and listen for air to exhaust.
If air does not exhaust immediately, replace relay valve (para 4-102).
If air exhausts immediately, fault not corrected. Notify supervisor.
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