TM 9-2330-390-14&P4-75. HUB, BRAKEDRUM, AND WHEEL BEARINGS MAINTENANCE (Con't).3.4.5.6.Inspect brakeshoes (18) for cracks, looseness oflinings or rivets, and wear. If linings are worn flaton wear notch (19) in middle of lining, a thicknessequal to or less than 5/8 in. (7.94 mm), replacebrakeshoes (see paragraph 4-57).Inspect brakedrum for cracks, scoring, pitting, orgrooves. Check edge of brakedrum for cracks orbroken areas. Replace damaged brakedrum.Inspect hub for cracks, breaks, or damage.Replace damaged hub.Inspect spindle for burrs. Remove burrs withcrocus cloth, clean with dry cleaning solvent, anddry with a clean rag.1.Install inner and outer bearing cups (14 and 16) squarely onto hub (15) until flush against shoulder.l Use extreme caution when handling heavy parts. Lifting device is required whenparts weigh over 50 lb (23 kg) for a single person lift, over 100 lb (45 kg) for a twoperson lift, and over 150 lb (68 kg) for a three or more person lift. Keep clear of heavyparts supported only by lifting device. Failure to follow this warning may causeserious injury or death to personnel.l Studs are marked LEFT-HAND and RIGHT-HAND. Left-hand studs must be installedon brakedrums on left side of dolly. Right-hand studs must be installed onbrakedrums on right side of dolly. Failure to follow this warning may cause wheelnuts to loosen when doily set is towed, resulting in injury to personnel.2.Assemble hub (15) and brakedrum (10) with ten studs (9).4-194
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