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TM 9-2330-272-14
Table 4-2. Organizational Troubleshoooting (Con’t).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 2.
Check relay valve for leaks and proper operation (para 4-40 and 4-41).
Replace relay valve (para 4-41).
Step 3.
Check service brake adjustment.
Adjust service brakes (para 4-31).
Step 4.
Check for weak or broken brakeshoe return spring.
Replace return spring (para 4-30).
6 .
NO BRAKES OR WEAK BRAKES.
Step 1.
Step 2.
Step 3.
Step 4.
Step 5.
Step 6.
Step 7.
Step 8.
Perform air leakage test (para 4-40).
Tighten loose fittings or replace air lines (para 4-39).
Check fluid level in master cylinder.
Fill master cylinder to within X in. (13 mm) from top (Chapter 3, Section l).
Check for leaking or damaged master cylinder.
Replace master cylinder (para 4-32).
Check for air in hydraulic brake system.
Bleed brakes (para 4-35).
Check service brake adjustment.
Adjust service brakes (para 4-31).
Check for grease on brakeshoe linings.
Replace brakeshoes (para 4-30). Replace oil seal if necessary (para 4-44).
Check for worn brakeshoe linings.
Replace brakeshoes (para 4-30).
Check for leaking or damaged wheel cylinder.
Replace wheel cylinder (para 4-33).
7.
SLOW APPLICATION OR SLOW RELEASE OF BRAKES.
Step 1.
Perform air leakage test. Check for leakage in service air line (para 4-40).
Tighten loose fittings or replace air line (para 4-39).
Step 2.
Check fluid level in master cylinder.
Fill master cylinder to within ~ in. (13 mm) from top (Chapter 3, Section l).
4-13
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