TM 9--2520--215--340052 00--2BRAKE LINKAGE, BRAKE AND BRAKE AIR VALVE LINKAGE ADJUSTMENT– CONTINUED0052 00BRAKE ADJUSTMENT1. Apply brakes firmly and measure travel of brake apply levers on output reduction gear assemblies. Outer hole ineach lever should travel forward no less than 2.92 inches or through an arc of 24 degrees.CAUTIONTravel must be no less than 24 degrees. Shorter travel will subject brakes to unnecessary wearand cause overheating.2. If travel is incorrect, release brake and adjust travel by rotating adjustment on brake apply lever. Clockwiserotation will shorten travel, counter clockwise will lengthen it. Adjust travel to as near 24 degrees rotation aspossible. After brakes have been in use, readjust them if travel is 34 degrees or more.BRAKE AIR VALVE LINKAGE ADJUSTMENT1. After brake have been adjusted disconnect brake air valve linkage assembly from left brake apply lever. Loosenthree 3/8--24 hexagon nuts, which locks rod ends and brake air valve linkage rod.2. Apply brakes firmly and, while brakes are applied, adjust length (between clevis pinhole centers) of brake air valvelinkage assembly. Length must be ¾ inch greater than the distance between clevis pin holes (center to center) inbrake apply lever and brake air valve linkage assembly lever. Release brakes.NOTEPlungers are correctly scribed when brakes are applied and a scribe mark is flush with bottom ofplunger stop, indicating manufactured and correct brake air valve linkage adjustment.3. Tighten three 3/8--24 hexagon nuts and reconnect brake air valve linkage assembly to brake apply lever. Applybrakes and check travel of plunger into plunger stop. Travel must be ¾ inch. Readjust as required to obtainrequired travel.END OF TASK
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