TM 9-2330-246-14
Table 4-2. Organizational Troubleshooting (Con't).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 2.
Check to see if ballast is defective.
Replace ballast (para 4-36).
Step 3.
Check to see if fixture is defective.
Replace fixture (para 4-36).
BRAKE SYSTEM
BRAKES DO NOT RELEASE.
8.
Check for weak or broken brakeshoe return spring(s).
Replace brakeshoe return spring(s) (para 4-55 or 4-56).
NO BRAKES OR WEAK BRAKES.
9.
Check to see if air pressure is low.
Step 1.
Check air pressure gage on towing vehicle. Remove any restrictions in air lines. Perform
leakage test (para 4-68).
Check for defective relay valve.
Step 2.
Perform operating test. Replace if necessary (para 4-65).
Check to see if air filter is clogged (if installed).
Step 3.
Replace air filter if clogged (para 4-66).
Check for leaks in hydraulic brake system (para 4-62).
Step 4.
Tighten connections.
Check brake fluid level in master cylinder (Chapter 3, Section l).
Step 5.
Fill master cylinder with brake fluid.
Step 6.
Check for defective master cylinder.
Replace master cylinder (para 4-61).
Step 7.
Check for air in hydraulic brake system.
Bleed brakes (para 4-57).
Step 8.
Check for grease or brake fluid on brakeshoe linings.
Replace brakeshoes (para 4-55 or 4-56). Replace seal if necessary (para 4-69). Replace
wheel cylinder(s) if necessary (para 4-59 or 4-60).
4-11
