TM-9-2320-260-20
TRUCK, 5-TON, 6X6, M809 SERIES (DIESEL)
TECHNICAL MANUAL; UNIT MAINTENANCE
APRIL 1995
TM-9-2320-260-20 - Page 697 of 1337
TM 9-2320-260-20
9-4. FRONT HUB AND DRUM MAINTENANCE (Contd)
NOTE
●
Perform step 3 only if front wheel is equipped with spacers.
• Assistant will help with steps 4 through 6.
●
It may be necessary to back off brake adjustment to remove
drum (para. 8-9).
3. Remove ten capnuts (4) and spacer (1) from wheel studs (3) and drum (2). Discard capnuts (4).
4. Remove drum (15) from spindle (11).
5. Remove ten nuts (5), lockwashers (6), and inspection cover (7) from drum (15). Discard lockwashers (6).
6. Remove drum (15) from adapter (8).
7. Remove ten bolts (9), wheel studs (12), and adapter (8) from hub (14). Discard bolts (9) and wheel
studs (12).
8.
Remove inner bearing (13) and grease seal (10) from hub (14). Discard grease seal (10).
b. Cleaning and Inspection
WARNING
Drycleaning solvent is flammable and will not be used near open
flame. Use only in well-ventilated places. Failure to do this may
result in injury to personnel.
CAUTION
1.
2.
3.
4.
5.
6.
7.
8.
9.
Do not use compressed air to dry bearings. Damage to bearings
may result.
Clean all hub and drum components with drycleaning solvent and allow to air dry.
Inspect bearings (13) and (16) in accordance with TM 9-214. Replace bearings (13) and (16) and
bearing cups (17) if either is damaged.
Inspect drum (15) for deep grooves, cracks, scores, and elongated holes. Replace drum (15) if cracked
or holes are elongated. If drum (15) is grooved or scored, notify your supervisor.
Inspect adapter (8) for cracks, warpage, or elongated holes. Replace adapter (8) if cracked, warped,
or holes are elongated.
Inspect bolts (9) and wheel studs (12) for breaks, bends, and damaged threads. Replace bolts (9) or
wheel studs (12) if broken, bent, or thread damaged.
Inspect hub (14) for cracks, breaks, and scores. Replace hub (14) if cracked, broken, or scored.
NOTE
• Bearings and bearing cups must be replaced as a matched set.
• Perform steps 7 through 9 if bearings and bearing cups are to be
replaced.
Using soft hammer and brass drift, remove two bearing cups (17) from hub (14). Discard bearing
cups (17).
Inspect bores of hub (14) for scoring, grooves, and wear. Replace hub (14) if bore is scored, grooved,
or worn.
Using arbor press, install new bearing cups (17) in hub (14). Ensure bearing cups (17) are seated
properly.
9-12
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