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TM 5-4210-220-34
2-21.
FRONT AXLE - Continued
2-21.1 Ball Socket Assembly - Continued
NOTE
Upper kingpin bearing has a smaller diameter bearing cone and a thicker wall bearing cup compared to
lower kingpin bearing.
(5)
Install upper and lower kingpin bearing
cones (20 and 19). Be sure correct
bearings are used with upper and lower
pins. Drive each bearing cone in place
using a suitable arbor and hammer. Be
sure sleeve only contacts bearing race and
not roller cage.
(6)
If removed, install upper and lower bearing
cups using a suitable arbor and hammer.
Tap bearing cups into ball socket until flush
with the kingpin cover surfaces.
(7)
Install washer (11) and nut (10) on kingpins
(12 and 13). Tighten nuts to 500 ft lb (680
Nm). If needed, tighten nuts further to line
up holes in kingpins with slots in nuts.
Install and secure cotter pins (9).
NOTE
Shims 0.003, 0.005, and 0.020 in. (0.08,
0.13, and 0.51 mm) in thickness, are
used between kingpin covers and ball
socket.
If
new
components
are
assembled, a shim pack of 0.045 in.
(1.14 mm) should be used under each
kingpin cover. If existing components
are reassembled, use either original
shim packs or new shim packs equal to
the original packs in thickness.
(8)
Install kingpin covers (3 and 4) together
with shims packs (8). Make sure ball
socket is centered on axle ball by using
shim packs of same thickness. If different,
exchange shims between packs until even
thickness is achieved. Tighten cover nuts
(6) to 360 ft lb (490 Nm) and capscrews (7)
to 220 ft lb (300 Nm).
(9)
Lubricate upper and lower kingpin bearings
with
grease
(item
16,
Appendix
B).
Lubricate until grease can be seen coming
out of bearing cones.
(10) Remove
kingpin
spreading
fixture.
2-284
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