TM 5-4310-452-14
4-66. TRAILER BRAKEDRUMS REPLACEMENT.
This Task Covers:
a. Removal
c. Installation
b. Inspection
Initial Setup:
Equipment Conditions:
Materials/Parts:
• Engine off.
• One cotter pin
• Trailer parked on flat, level surface.
•· One grease seal
• Trailer wheels chocked.
• Trailer tire removed (see paragraph 4-73).
References:
Tools/Test Equipment:
•· LO 4310-452-12
• General mechanic's tool kit
• Seal puller
a.
REMOVAL
1.
Remove grease cap (11), cotter pin (9), castle nut (10), spindle washer (8), outer bearing (7), and cup (6) from
spindle (1). Discard cotter pin.
2.
Remove brakedrum (5) from spindle (1).
3.
Using seal puller, remove grease seal (2) from brakedrum (5). Discard grease seal.
4.
Remove cup (4) and inner bearing (3) from brakedrum (5).
b.
INSPECTION
1.
Inspect inner and outer bearings (3 and 7) and cups (4 and 6) for rust or pits. Replace if defective.
2.
Inspect brakedrum (5) for signs of scoring or heat spots. Replace if defective.
c.
INSTALLATION
1.
Pack inner and outer bearings (3 and 7) (see LO 5-4310-452-12).
2.
Install cup (6) in brakedrum (5).
3.
Install cup (4) in brakedrum (5).
4.
Install inner bearing (3) and new grease seal (2) in brakedrum (5).
5.
Install brakedrum (5) on spindle (1).
6.
Install outer bearing (7), spindle washer (8), and castle nut (10) on spindle (1).
7.
Loosen castle nut (10) about -turn until hole is visible in spindle (1).
8.
Install new cotter pin (9) and grease cap (11) on spindle (1).
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