TM 9-2320-365-20-2             KNOWN INFO                         TEST OPTIONS                REASON FOR QUESTION     YES NO i6.  FRONT BRAKES DO NOT APPLY (CONT) Audible and Visual Inspection             KNOWN INFO                         TEST OPTIONS                REASON FOR QUESTION     Audible and Visual Inspection 2-1694          Change 1 5. 4.        POSSIBLE PROBLEMS        A blocked or leaking air hose 202 may cause front brakes not to apply. Replace damaged/blocked air hose 202 (para 11-19).        POSSIBLE PROBLEMS        NO YES Air tanks pressurized. Rear brakes OK. Air hose 208 OK. Foot control valve OK. Air hose 206 OK. Air hose 202 OK. Air tanks pressurized. Rear brakes OK. Air hose 208 OK. Foot control valve OK. Air hose 206 OK. Faulty air hose 202. Faulty front brake two-way check valve. Faulty air hose 218. Faulty air hose 217. Faulty front axle quick release valve. Faulty front brake two-way check valve. Faulty air hose 218. Faulty air hose 217. Faulty front axle quick release valve. Is air present at front brake two-way check valve supply port when applying brakes? Is air present at front brake two-way check valve delivery port when applying brakes? If air is not present at front brake two-way check valve delivery port when applying brakes, front brake two-way check valve is faulty. Replace front brake two-way check valve (para 11-24).