TM 9-2320-272-24-2
3-461. REAR HUBS REPAIR (Contd)
b. Cleaning and Inspection
1.
For general cleaning instructions, refer to para. 2-14.
2.
For general inspection instructions, refer to para. 2-15.
NOTE
Bearings and bearing cups must be replaced as a matched set.
3.
Inspect inner bearing cup (2) and outer bearing cup (5) for cracks, chips, or excessive wear. Replace
bearing(s) and bearing cup(s) if damaged (task cl.
4.
Inspect plastic sleeve (1) for excessive wear. Replace plastic sleeve (1) if worn (task c).
5.
Inspect studs (3), oil slinger (4), and hub (6) for stripped threads, chips, and cracks. Replace
damaged parts (task c).
6.
Inspect seal surface of spindle (9) for rust, scratches, and grooves.
a. If rusted, disconnect air line (7) from air manifold fitting (8).
WARNING
Eyeshields must be worn when cleaning with compressed air.
Compressed air source will not exceed 30 psi (207 kPa). Failure to
do so may result in injury to personnel.
b. Using external air source, blow dirt and debris from seal surface of spindle (9) by forcing air
through air manifold fitting (8).
WARNING
Drycleaning solvent is flammable and toxic. Do not used near an
open flame and always have a fire extinguisher nearby when
solvents are used. Use only in well-ventilated places, wear
protective clothing, and dispose of cleaning rags in approved
container. Failure to do this will result in injury to personnel
and/or damage to equipment.
c. Thoroughly clean entire surface of spindle (9) with drycleaning solvent.
d. Connect air line (7) to air manifold fitting (8).
CAUTION
Avoid filing too deeply in seal surface of spindle. Excessive filing
may result in permanent damage to spindle.
e. Remove deep scratches by carefully tiling seal surface of spindle (9) in a circular motion.
NOTE
It is unnecessary to remove the circular depression of a groove;
only the raised portion or lip.
f. Using abrasive cloth, remove light surface scratches from seal surface of spindle (9).
g. If excessively rusted, scratched, or grooved, notify DS maintenance for rear axle replacement.
c. Repair
1.
Using bearing punch, remove outer bearing cup (5) from hub (6) by tapping alternately on outer
edges of outer bearing cup (5). Discard outer bearing cup (5).
2.
Using bearing punch, remove inner bearing cup (2) from hub (6) by tapping alternately on outer
edge of inner bearing cup (2).
3.
Remove plastic sleeve (1) from hub (6) by splitting and prying plastic sleeve (1) from hub (6).
Discard plastic sleeve (1).
3-1260
