Chevrolet 10 Series 1970, Service Manual

Page: 205 / 671

REAR SUSPENSION AND DRIVE LINE 4-29
F ig . 5 3 — In s ta llin g H u b O u t e r B e a rin g ( T y p ic a l)
axle, 15,000 lb. (tw o-speed); M50, tra ilin g . T o o l
J-22350 fo r 17,000 lb. (Tw o-Speed) axle (fig. 52).
NOTE: The b earin g c u p -to -re ta in e r ring seat­
ing p rocedu re is essen tial to assure that an
accurate wheel b earin g adjustment w ill be ob­
tained, and that the adjustment w ill not loosen
during veh icle operation.
Drum D em ountable-Type (Fig. 4 4 )
Replacem ent
The dem ountable-type drum may be separated fro m the
hub and rem oved fro m the v e h ic le without disturbing the
axle shaft and hub. The drum is held to the hub by coun­
tersunk, slotted screw s, which a re e a s ily rem oved with a
s c re w d r iv e r .
D ru m -N o n d em ou n tab le-T yp e (Fig. 4 5 )
Replacem ent
Construction, o f the nondemountable-type hub and drum
assem bly, is such that replacem en t cannot be a ccom ­
plished with the hub assem bly in stalled on the veh icle.
1. Separate the drum and hub by rem ovin g the dru m -to-
hub retaining b olts, hub stud nuts, o r by p ressin g out
the wheel studs, as applicable.
2. P o sitio n brake drum to hub assem bly, making certain
that all drain holes a re in alignm ent.
3. Apply a light, even coating o f sealin g compound to the
hub o il d efle c to r contact su rface, and position d e­
fle c to r to drum.
4. Install drum -to-hub retaining bolts, hub stud nuts, or
p re s s wheel studs into drum, as applicable.
W h eel Bolt
Replacem ent.
W heel b olts a re s e rra te d and may also be swaged in
p lace; how ever, replacem en t procedu re rem ains the
sam e fo r both types o f installation.
F ig . 5 4 — W h e e l B o lt R e p la c e m e n t
P r e s s bolts out o f hub flange (as illu strated in F igu re
54) and p re s s new b olts into place, making sure they a re
a tight fit. If a ll bolts w ere rem oved, be sure that hub o il
d e fle c to r is in position under bolt heads.
Hub Stud
Replacement
Hub studs can be rem oved and rep laced by using a con­
ventional stud re m o v e r and re p la c e r. Make sure that
studs a re fir m ly bottom ed in holes and that threads a re
not damaged during installation.
O il Seal Sleeve and Bearing Thrust Spacer
Replacement
The hub inner b earin g spacer and sle e v e assem bly
should be inspected when the hub and b earin g assem bly is
rem oved fro m the axle housing (fig. 56).
If inspection dictates the need fo r replacem en t, p ry the
s le e v e and spacer assem b ly fro m the housing, being
c a refu l not to damage machined su rface o f axle housing.
P r e s s a new bearin g sp acer into the I.D. o f a new
s le e v e - spacer should seat against bottom o f s le e v e .
CAUTIO N: The O.D. o f the s leeve is the run-
ning surface fo r the hub o il seal. Use extrem e
ca re to p reven t dam age to this surface when in-
stalling the b earin g spacer (fig. 64).
Tap the sle e v e assem bly onto the axle housing until the
bearin g spacer contacts shoulder on housing.
W h eel Hub O il Seal
Replacement
P r y old seal fro m its location in the hub b ore, using
c a re so as not to dam age bore su rface. Thoroughly clean
a ll o il and fo reign m atter fro m seal contact area in hub
b o re . Pack the cavity between the seal lip s with a high-
m eltin g point wheel b earin g lubricant, and position seal
in hub b ore. C arefu lly p re s s the seal into the hub b ore,
using appropriate tool until seal is p ro p e rly seated
(fig . 55).
CHEVROLET TRUCK SERVICE MANUAL
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REMOVAL
WKKM —
INSTALLATION