e. Inspect wheel studs for indications of elongation
load the trunnion bearing until a reading of 46 to, 53
and wear. Wheel studs must be replaced as a set.
pounds is read on the scale. Read scale while spindle
f. Inspect housings, covers and planet carrier to
support is moving.
assure they are thoroughly cleaned and that mating
k. Use a feeler gage to determine the required shim
surfaces, bearing bores and sealing surfaces are free
(80) thickness between the lower flange of the trunnion
from nicks and burrs. Check all parts for cracks or con-
and the spindle support. Remove the lower trunnion
ditions which would cause subsequent oil leaks or
and add the required shims (80). Install the lower trun-
nion and mounting screws. Recheck preload as in step
g. Replace brake shoe return springs.
j. Install puller screws (74).
h. Inspect brake drums for cracks, heat checks, scor-
l. Install lubrication fittings (71), (58), and (59).
ing or other damage. If drum internal diameter exceeds
m. Press bushing (66) into spindle bore. Edge of
20.25 inches, replace the drum.
bushing must be recessed one-eighth of an inch. Apply
light coating of Permatex No. 2, or equivalent to outer
diameter of wheel shaft oil seal (67) and press seal ]i7)
into spindle (65). Remove excess sealant. The lip of seal
a. Refer to figure 16-2. On rear axle assembly, in-
(67) must face toward the spindle bore.
stall lock arm (113), lock arm pin (112), snap ring (111),
n. Lubricate spindle bushing and lips of seal (;7)
pin (110), lock pin (109) and secure with roll pin (108).
with light oil. Position spindle support and secure with
b. Install breather (102), filler plug (101) and
bolts (63) and lock washers (64).
breather plug (100) in axle housing (103).
o. Tap spindle support bushing (62) into place in
c. If differential has been removed, install dowel
spindle support. Slide thrust washer (61) on brake
(99), studs (98) and (97). Apply a thin coating of Per-
camshaft (60). Insert camshaft (60) through bushing
matex No. 2 to mating surfaces and install differential
(62). Install slack adjuster (57) and retaining washer
and carrier assembly and secure with lock washers (96)
(56) on the camshaft and secure with retaining ring
and nuts (95).
d. Apply a light coating of Permatex No 2 to the
p. Position the air chamber on air chamber bracket
flange of grease retainers (106) and install grease re-
(70) and secure with nuts (53) and lock washers (54).
tainers in the upper trunnion bearing bore. Wipe up ex-
Secure clevis of brake chamber to slack adjuster with
cess Permatex. Install trunnion bearing (104). Turn
pin (52) and cotter pin (51).
axle over and install grease retainer (107) and bearing
q. Install brake shoes on spindle support and secure,
(105). lubricate trunnion bearings with lithium base
with anchor pins (50). Install new brake shoe return
grease according to MIL-G-10924-B.
springs (45) using a suitable brake pliers. Be sure slack
e. Assemble bearing retainer (93), oil seal (92), bear-
adjusters are adjusted to allow brake shoes to come
ing (91) and retainer collar (90) on axle shaft (94). Coat
together as closely as possible to minimize spring ten-
the flange of retainer (93) with a thin coating of Per-
sion during installation. Lock brake shoe anchor pins
matex No. 2 and position the axle shaft assembly in the
with brake pin set screws (46), washer (49), screw (48)
housing so that the splines in the shaft engage the
and lock wire (47).
splines of the differential. Secure the axle shaft assem-
r. Install wheel studs (43) in hub (44). Install bear-
bly with screws (88) and lock washers (89).
ing cup (41) in hub (44) with wide diameter of taper
f. Assemble universal-joint (items 83 through 86)
towards the outside of the hub. Be sure bearing cup (41
and secure to axle wheel (87). Install assembled univer-
is fully seated.
sal joint and wheel axle to axle shaft (94) and secure
s. Lubricate roller bearing (40) with gear oil anti in-
with bolts (82).
stall bearing (40) in hub (44). Press seal (39) into, place,
g. Position spindle support (81) on the axle housing.
and position oil catcher (38).
Align spindle support and bearing bores of the housing.
t. Position brake drum (37) on hub (44), align match
Drive lower trunnion (79) into position without shims.
marks made during disassembly. Secure with bolts (35)
Loosely install bolts (75) and lock washers (76). Allow
and washers (36).
at least one-fourth inch of play between bolt heads and
u. Support the hub and drum assembly with a suita-
trunnion. Install lubrication fitting (78).
ble chain hoist. Lubricate lip of hub and drum seal and
h. Invert axle assembly. Install shims (72) amd up-
position the hub and drum assembly on the axle. Be
per trunnion (73). Install mounting bracket (70) and
sure to align the hub and drum assembly with the, spin-
secure with screws (68) and lock washers (69).
dle so that the inner hub bearing does not cock when
i. Tighten lower trunnion bolts (75) evenly in small
the assembly is slid onto the spindle.
increments until some resistance is felt when the spin-
v. Install bearing cup (34) and bearing (33) in ring
dle support is pivoted from side to side.
gear hub (30). Position internal ring gear (29) 01n hut)
j. Attach a pound pull scale to the tie rod arm on the
(30) and secure with screws (31) and plate retainers
spindle support. Tighten lower trunnion screws to pre-