TM 9-4940-549-14&P
Wheel Bearing Adjustment.
e.
(1) Remove the hub cap (3, figure 19-2), gasket (4), nut (5), and
washer (6).
(2) Use a wrench and tighten the adjusting nut (7), while turning
hub and brake drum, until hub and brake drum bind. Then
back off adjusting nut slightly until hub and brake drum turn
freely.
Place the washer (6) on the axle shaft next to the adjusting
(3)
nut (7). If one of the holes on the washer is not aligned with
the pin on the inner adjusting nut, remove the washer and
reinsert it in the inverted position. If a hole still does not
align with the pin, the inner adjusting nut (7) must be turned
counterclockwise so that the nearest hole in the washer is lined
up. Then, install the adjustment locking nut (5), gasket (4),
and cap (3), and secure with six washers (2), and screws (1).
(4) Adjust other wheel bearings in the same manner.
BRAKE ADJUSTMENT.
a.
Following overhaul or when new linings are installed, the initial ad-
justment should be carefully made to properly locate the curvature of
the lining to the drum and to obtain the proper clearance.
b.
Each shoe must be adjusted to center the brake shoe arc in relation
to the drum.
Turn the adjusting screws (fig. 19-3) to bring lining into contact
c.
with the drum and rotate the anchor pin sufficiently to relieve drag.
Repeat until additional rotation of anchor pin will no longer relieve
drag.
Lock anchor pin locknut and back off adjusting screw to permit wheel
d.
to turn freely.
NOTE
Turn the adjusting screw on the left
side of the bleeder screw in a coun-
terclockwise direction to bring the
lining into contact with the drum.
Turn the adjusting screw to the right
of the bleeder screw, clockwise, to
bring the other lining into contact
with the drum.
Subsequent adjustments to compensate for lining wear are made by
e.
turning the adjusting screws to bring linings into contact with the
drum. Back off sufficiently to permit free rolling drum.
