TM 9-2330-238-14
Table 4-2. Organizational Troubleshooting (Con’t).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 7.
Check for defective master cylinder.
Replace defective master cylinder (para 4-41).
Step 8.
Check for defective wheel cylinder.
Replace defective wheel cylinder (para 4-39).
15. BRAKES GRAB.
Step 1.
Step 2.
Step 3.
Step 4.
Step 5.
Step 6.
Step 7.
Check for moisture in air filters or air reservoir.
Drain moisture from air filters or air reservoir.
Check for proper brake adjustments.
Adjust brakes (para 4-36).
Check for defective relay valve.
Perform operating test (para 4-44). If necessary, replace relay valve (para 4-44).
Check for contaminated brakeshoe linings.
Clean brakedrum and brake components. If necessary, replace brakeshoe (para 4-38) and
oil seal (para 4-48).
Check for cracked, scored, or deformed brakedrum.
Replace defective brakedrum (para 4-48).
Check for loose or worn brakeshoe linings.
Replace defective brakeshoes (para 4-38).
Check for loose or worn wheel bearings.
Adjust wheel bearings (para 4-48). If wheel bearings cannot be adjusted, replace wheel
bearings (para 4-48).
16. BRAKEDRUM RUNNING HOT.
Step 1.
Check to see if brakes are adjusted properly.
Adjust brakes (para 4-36).
Step 2.
Check for weak or broken brakeshoe return springs.
Replace defective brakeshoe return springs (para 4-38).
Step 3.
Check for cracked, scored, or worn brakedrum.
Replace defective brakedrum (para 4-48).
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