TM 9-2330-359-14&P
Table 4-2. Organizational Troubleshooting (Con’t).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 2.
Check for proper operation of standard airbrake chambers.
Replace defective airbrake chamber (para 4-42).
Step 3.
Check for weak or broken brakeshoe return spring.
Replace return spring (para 4-31).
Step 4.
Check for proper service brake adjustment.
Adjust service brakes (para 4-31).
5. BRAKES DO NOT ENGAGE OR ARE WEAK.
Step 1.
Step 2.
Step 3.
Step 4.
Step 5.
Perform air leakage test (para 4-37).
Tighten any loose fittings or repair or replace fittings as required (para 4-35 or 4-36).
Check for proper operation of emergency relay valve.
Replace defective emergency relay valve (para 4-43).
Check for presence of grease on brakeshoe linings.
Replace brakeshoes and defective oil seals (paras 4-31 and 4-44).
Clean brakedrum (para 4-44).
Check for worn brakeshoe linings.
Replace brakeshoes if linings are worn within 1/16 in. (1.6 mm) of rivet heads (para 4-31).
Check for proper service brake adjustment.
Adjust service brakes (para 4-31).
6. BRAKES ENGAGE OR RELEASE SLOWLY.
Step 1.
Check for restrictions in air lines and hoses.
Remove restriction or replace defective air lines and hoses (para 4-35 or 4-36).
Step 2.
Check for proper operation of emergency relay valve.
Replace defective emergency relay valve (para 4-43).
Step 3.
Check for weak or broken brakeshoe return spring.
Replace return spring (para 4-31).
Step 4.
Check for proper operation of airbrake chamber.
Replace defective airbrake chamber (para 4-42).
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