i5.  VEHICLE BRAKES UNEVENLY, BRAKES PULL TO ONE SIDE OR GRAB (CONT) TM 9-2320-365-20-2             KNOWN INFO                         TEST OPTIONS            Visual inspection     REASON FOR QUESTION                 KNOWN INFO                  REASON FOR QUESTION     Visual inspection            TEST OPTIONS            8. 9. 2-1684          Change 1 Are rear brake shoes on affected wheel(s) free from contamination, oil, and grease? Rear brakes will slip or bind on affected wheels if brake shoes are contaminated. Do brakes at one or more rear wheels fail to apply? YES Clean brake shoes (para 2-37) and replace wheel bearing seals (para 10-2). NO If one rear or more rear wheel brakes do not apply, vehicle will drag or swerve when brakes are applied. Perform brake shoe clearance adjustment (para 11-3). YES NO Air tanks pressurized. Front wheel brake shoes OK. Front wheel brake adjustment OK. Front axle quick release valve OK. Air hose to front brake air chamber OK. Front brake vent hose OK. Front brake air chamber OK. Load sensing valve OK.        POSSIBLE PROBLEMS        Contaminated rear brake shoes. Faulty rear wheel brake adjustment. Faulty relay valve. Faulty air hose to rear brake air chamber. Faulty rear brake vent hose or vent valve. Faulty rear brake air chamber(s). Air tanks pressurized. Front wheel brake shoes OK. Front wheel brake adjustment OK. Front axle quick release valve OK. Air hose to front brake air chamber OK. Front brake vent hose OK. Front brake air chamber OK. Load sensing valve OK. Rear brake shoes OK.        POSSIBLE PROBLEMS        Faulty rear wheel brake adjustment. Faulty relay valve. Faulty air hose to rear brake air chamber. Faulty rear brake vent hose or vent valve. Faulty rear brake air chamber(s).