TM 9-2320-361-20 Table 2-3. Compressed Air and Brake System Troubleshooting (Contd). MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 6. BRAKES DRAG Step 1. Check brake pedal (6) free travel. Free travel should be 0.25-0.5 in. (6.35-12.7 mm). Adjust brake pedal (6) free travel (para. 8-14). Step 2. Check hydraulic brake lines (2) for bends, kinks, or restrictions. Replace if hydraulic brake lines (2) are bent, kinked, or restricted. Refer to TM 9-243 for instructions to double flare hydraulic brake lines (2). Step 3. Check service brakeshoes (1) adjustment (para. 8-8). Step 4. Check service brake hydraulic fluid for contamination. If fluid is contaminated, flush entire brake system (para. 8-12). Step 5. Perform master cylinder (7) internal leakage test (para. 8-10). a. If master cylinder (7) is leaking internally, replace (para. 8-10). b. If master cylinder (7) is good, and malfunction still exists, replace air-hydraulic cylin- der (8) (para. 8-11). END OF TESTING! 2-61