TM 9-2330-267-14&PTable 3-1. Operator/Crew Troubleshooting (Con’t).MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTIONStep 4.Check for moisture inside composite light assembly.Notify organizational maintenance.BRAKES3.BRAKES DRAG WHEN TRAILER IS TOWED.Check to ensure that handbrake levers have been disengaged.Disengage handbrake.Notify organizational maintenance if brakes still drag.4.BRAKES ARE LOCKED; WHEELS WILL NOT TURN.Step 1.Check for closed air valve on towing vehicle.Open air valve. Refer to towing vehicle technical manual for instructions.Step 2.Drain air from air reservoir. If brakes do not free, perform step 3.Step 3.Ensure that service brake intervehicular air hose is connected to the proper air coupling on towingvehicle.Connect intervehicular air hoses to proper towing vehicle air couplings.5.BRAKES WILL NOT HOLD WHEN SERVICE BRAKES ARE APPLIED.Step 1.Check for presence of brake fluid in master cylinder.Notify organizational maintenance if brake fluid level is low.Step 2.Ensure that towing vehicle air valves are turned on.Turn on towing vehicle air valves. Refer to towing vehicle operator’s manual.Step 3.Check for evidence of leaking brake fluid or water around disk and rim assembly, and backingplate assembly, which would indicate saturated brake linings.Notify organizational maintenance if brake fluid leaks are found.Dry service brakes by applying while trailer is in motion.6.AIR IS LEAKING WHEN INTERVEHICULAR AIR HOSES ARE CONNECTED.No further test or inspection is required.Notify organizational maintenance.7.FLUID IS LEAKING AROUND MASTER CYLINDER OR WHEEL CYLINDER.No further test or inspection required.Notify organizational maintenance.3-9
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