Chevrolet 10 Series 1970 Service Manual page 173

7. Back o ff inner lock nut 90° (1/4 turn). Install keeper
(w asher with holes)
spindle. Tighten outer lock nut to 50 ft. lbs.
NOTE: Final bearin g adjusting should be from
.001" to .010" end play.
8. In stall internal clutch g e a r c o lla r and gear.
9. Install lock ring at end o f axle shaft.
A ssem b ly o f Locking Hub Cap A ssem b ly
" O "
a. Use ring lube and in stall the new " O " ring
in the gro o ve of the p la stic hub key knob and in ­
s e r t into retain er cap.
b. Install the lock ring securing the plastic key knob
to the hub retain er cap.
NOTE: Check to see that lock rin g is fu lly en­
gaged into slot by pushing outward on the plastic
knob.
c. Install the slotted adjustment s leeve with the two
tabs facin g downward.
d. Install the key knob retaining r o ll pin with knob
in " L O C K E D " position.
e. Install spring.
f . P la ce outer clutch
spring, com p ress spring and in stall lock ring at
s le e v e end.
g. Turn key knob to " F R E E " position.
NOTE: B efore continuing to in sta ll the exten ­
sion housing and the assem bled cap assem bly,
rem ove the head fro m a 3/8" bolt 5 inches long
and use to align the assem bly of parts to the hub.
10. In stall above noted bolt alignm ent tool into one o f the
hub housing bolt holes.
11. In stall the new e x te r io r s le e v e extension housing
gasket and housing and the new hub reta in er cap
assem bly gasket and cap assem bly.
12. In stall alien head bolts secu ring the reta in er cap a s ­
sem bly to the wheel hub. Torque to specifications.
13. Turn hub key knob to the locked position to assure
engagem ent into position.
14. Install wheel and tir e assem bly and low er veh icle on
hoist.
FRONT AXLE ASSEMBLY (Refer to Fig. 4 4 )
Removal
1. D i s a s s e m b l e p r o p e lle r
d ifferen tia l.
2. R aise front o f v e h icle on hoist until weight is r e ­
m oved fro m fron t sp rin gs. Support truck with jack
stands behind fron t springs.
3. D isconnect connecting rod fro m steerin g arm .
4. Disconnect brake hoses fro m fra m e fittin gs.
5. D isconnect shock absorbers fro m axle brackets.
6. Dismount " U " bolts fro m axle to separate axle fro m
truck springs.
7. R o ll front axle out fro m under the truck.
Installation
NOTE: A ll spring attachments, including cen ter
bolts, are im portant attaching parts in that they
could a ffect the p erform a n ce o f v ita l components
and system s, and/or could resu lt in m ajor r e ­
p a ir expense. They must be replaced with parts
o f the same part numbers o r with equivalent
and align tang with slot in
g e a r assem bly on top o f
shaft fro m front axle
parts i f replacem ent becom es n ecessa ry. Do not
use replacem ent parts o f le s s e r quality o r sub­
stitute design. Torque values must be used as
sp ecified during rea ssem b ly to assure p ro p er
retention o f these parts.
1. Truck should be on jack stands as in Step 2 o f r e ­
m oval instructions.
2. P la ce axle in position under truck.
3. Install " U " bolts attaching axle to fron t springs.
4. Attach shock ab sorb ers to axle brackets.
5. Connect brake hoses to fram e fittings.
6. Attach connecting rod to steerin g arm .
7. Rem ove jack stands and lo w er front o f truck.
8. A ssem b le p ro p e lle r shaft to front axle d ifferen tia l.
9. L o w er veh icle on hoist.
Disassembly (Refer to Front A x le Assembly for
Removal of A xle From Vehicle)
R e fe r to K10 o r K20 fr e e w heeling hub
NOTE:
fo r rem o va l o f 4-w heel d rive units with a fre e
wheeling hub assem bly, b efo re starting the below
disassem bly o f the front axle assem bly.
1. With the axle sec u rely positioned fo r disassem bly -
and fo r axle assem b lies without fr e e w heeling hubs,
(See Note above) rem ove hub cap and snap ring. Skip
to Step 4 fo r veh ic les equipped with fre e wheeling
hubs.
2. Use a screw d r iv e r and one hand o v e r the d riv e g ea r
to rem ove d riv e g ea r and p ressu re spring.
3. R em ove w heel bearin g outer locknut, lockrin g, and
wheel b earin g inner adjusting nut with sp ecial T o o l
J-6893.
4. Rem ove drum assem bly, outer wheel bearin g and
spring reta in er. B earin g
out as drum is rem oved.
NO TE: R e fe r to B rakes,
manual, i f drum, shoes, backing plate, springs
and other brake component rep a irs o r re p la c e ­
ments are required.
W heel Hub Components—Disassembly
a. Rem ove o il sea l and inner bearin g cone fro m hub.
Use b rass d rift and tap lightly with ham m er. D is ­
card o il seal.
b. Rem ove inner and outer b earin g cups using a
b rass d r ift and rawhide ham m er.
5. Rem ove grea se reta in er, bolts and reta in er with
gasket fro m backing plate. D iscard gasket.
6. Rem ove backing plate bolts. R em ove backing plate.
7. R em ove spindle and bronze thrust w asher by tapping
ligh tly with rawhide ham m er to break spindle loose
fro m knuckle. D iscard thrust w asher i f any w ear has
occu rred.
Spindle Components—Disassembly
a. Secure spindle in v is e by locating on the high step
diam eter. Be sure the machined surface o f the
spindle w ill not be damaged by the v is e jaw s. R e ­
m ove o il seal.
b. Rem ove needle r o lle r bearing.
8. R em ove axle shaft and joint assem bly.
A x le Joint Components— Repair
a. Rem ove lock rin gs by rem oving p ressu re fro m
FRONT SUSPENSION 3-25
and reta in er w ill slide
Section 5, in this
CHEVROLET TRUCK SERVICE MANUAL