TM 9-2320-364-20-22-186614. SERVICE BRAKES ON AXLES NO. 1 AND NO. 2 DO NOT APPLY (CONT).7.Do service brakes on AxlesNo. 1 and No. 2 apply?Fault not corrected.Notify DSMaintenance.YESNOBrakes on Axles No. 1 and No. 2 fail to operate.Air lines free of crimps or leaksand fittings, valves and air chambers free of leaks.Brake treadle valve OK.Service relay valve No. 1OK.Air chambers OK.Brakes OK.KNOWN INFOPOSSIBLE PROBLEMSTEST OPTIONSREASON FOR QUESTIONVerify repair.If service brakes on Axles No. 1and No. 2 apply, fault has beencorrected.Fault corrected.