TM 9-2330-238-14
Table 4-2. Organizational Troubleshooting (Con’t).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 5.
Check for leaks in hydraulic brake system.
Tighten connections.
Step 6.
Check brake fluid level in master cylinder.
Fill master cylinder with brake fluid to proper level (Chapter 3, Section l).
Step 7.
Check for air in hydraulic brake system.
Bleed hydraulic brake system (para 4-37).
Step 8.
Check for contaminated brakeshoe linings.
Clean brakedrum and brake components. If necessary, replace brakeshoe (para 4-38) and
oil seal (para 4-48).
Step 9.
Check worn brakeshoe linings.
Replace brakeshoe if lining is worn (para 4-38).
Step 10. Check for defective master cylinder.
Replace defective master cylinder (para 4-41).
Step 11.
Check for defective wheel cylinder.
Replace defective wheel cylinder (para 4-39).
14. BRAKES ARE SLOW TO ENGAGE OR RELEASE.
Step 1.
Step 2.
Step 3.
Step 4.
Step 5.
Step 6.
Check for low air pressure.
Check air pressure gage on towing vehicle.
Remove any restrictions in air lines. Perform leakage test. With air couplings connected and
brakes applied, coat air couplings with soap and water solution and check for leaks.
On semitrailers with air filters, check for clogged filter,
Clean or replace air filter element (para 4-43).
Check for defective relay valve.
Perform operating test (para 4-44). If necessary, replace relay valve (para 4-44).
Check brake fluid level in master cylinder.
Fill master cylinder with brake fluid to proper level (Chapter 3, Section l).
Check for air in hydraulic brake system.
Bleed hydraulic brake system (para 4-37).
Check for weak or broken brakeshoe return springs.
Replace brakeshoe return springs (para 4-38).
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