TM 9-2320-365-20-2             KNOWN INFO                         TEST OPTIONS                REASON FOR QUESTION     YES NO i6.  FRONT BRAKES DO NOT APPLY (CONT) Is air present at foot control valve delivery port 22 when applying brakes? 2. Lack of air from foot control valve delivery port 22 will prevent front brakes from applying. Audible and Visual Inspection Replace foot control valve (para 11-9). 3.             KNOWN INFO              YES            TEST OPTIONS                REASON FOR QUESTION     Audible and Visual Inspection NO 2-1692          Change 1        POSSIBLE PROBLEMS               POSSIBLE PROBLEMS        Is air hose 206 free from leaks and damage? Replace damaged/blocked air hose 206 (para 11-19). A blocked or leaking air hose 206 may cause front brakes not to apply. Air tanks pressurized. Rear brakes OK. Air hose 208 OK. Air tanks pressurized. Rear brakes OK. Air hose 208 OK. Foot control valve OK. Faulty foot control valve. Faulty air hose 206. 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 air hose 206. 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.