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 TM 9-2330-202-14&P
4-43.
HUB, BRAKEDRUM, AND WHEEL BEARINGS MAINTENANCE (M101A2, M101A3,
M116A2, M116A2E1, AND M116A3) (CONTINUED).
c.
CLEANING AND INSPECTION
WARNING
Wear an approved filter mask and gloves. NEVER use compressed air or a dry
brush to clean brake components. Dust may be removed using an industrial-
type vacuum cleaner. Clean dust or mud away from brake components with
water and a wet, soft brush or cloth.
Drycleaning solvent P-D-680 is toxic and flammable. Always wear protective
goggles and gloves, and use only in a well-ventilated area. Avoid contact with
skin, eyes, and clothes, and DO NOT breathe vapors. DO NOT use near open
flame or excessive heat.
1.
Clean and inspect inner and outer bearings and cups in accordance with TM 9-214. If any bearing or
cup needs replacing, all bearings and cups must be replaced.
2.
Clean all other removed components with drycleaning solvent and rag and allow to dry.
3.
Wipe spindle clean with drycleaning solvent and rag. Inspect spindle for cracks, bends, and scored
or discolored bearing surfaces. If threads are damaged, restore. Notify Direct Support maintenance if
spindle is damaged beyond repair.
4.
Inspect hub for cracks, breaks, and burrs. Remove burrs with abrasive cloth. Replace hub if dam-
aged.
5.
Inspect stud holes of brakedrum for cracks. Discard brakedrum if stud holes are cracked.
WARNING
DO NOT use a brakedrum that exceeds maximum wear specifications. Fail-
ure to follow this warning may result in brake failure and injury or death to
personnel
6.
Measure inside diameter of brakedrum. Discard and replace brakedrum if inside diameter exceeds
12.065 inches (30.65 cm).
7.
Inspect braking surface of brakedrum for cracks, hot spots, and scoring. Discard and replace brake-
drum if damaged.
8.
Inspect braking surface for out-of-round at 45-degree intervals. Out-of-round should not exceed
0.015 inch (0.38 mm). If runout exceeds 0.015 inch (0.38 mm), replace brakedrum.
9.
Inspect all remaining components for damage. Replace if damaged.
d.
ASSEMBLY
1.
If removed, drive eight new shoulder bolts (17) into hub (2).
2.
Install outer and inner cups (15 and 16)
in hub (2).
3.
Align holes in brakedrum (11) with holes
in hub (2). Loosely install two machine
screws (14) in brakedrum (11).
4.
Tap brakedrum (11) against hub (2) with
soft-faced hammer. Fully tighten two
machine screws (14).
5.
Pack inner bearing (13) with grease and
install in hub (2).
6.
Install new seal (12) in hub (2).
438-099
4-86
Change 2
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