TM 9-2320-279-34-2Change 3 11-4.1Brake System Maintenance Instructions (Cont)Inspection and Repair.WARNINGDO NOT grind or sand painted equipment without high efficiency airpurifying respirators in use.NOTE·Some hubs have three bosses added during manufacture that can interferewith installation of bolt together wheels. If replacing a split rim wheel,inspect the hub for any bosses that might interfere with the installation ofthe bolt together wheel.·Axles no. 1 and no. 2 on all vehicles and all axles on the M984A1 are notaffected.·On rear tandem axles of all models, except the M984A1, the brake drummay have a boss of different widths or the same width.·If the width of two bosses on the drum are different, no rework is required.If all three bosses are the same size, grind approximately 1/2 in. (12.7 mm)chamfer off of boss leaving 1/8 in. (3.2 mm) of the boss.
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