Component Replacement - Chevrolet 1977 light duty truck Service Manual

HUB REPLACEMENT
CAUTION: See CAUTION on page 1 o f this
section regarding the fasteners in the following
procedures fo r hub replacement.
FREE-W HEELING HUBS
K10, K 20 (P A R T -T IM E )
Hub Rem oval
1. T u rn actuator lever to set hub to " L O C K "
position (Fig. 3C-5K) and raise vehicle on hoist.
2. Remove six retaining plate bolts and remove
re ta in in g plate actuating knob and " O " ring.
3. R em ove in ternal
retain in g ring and actuating cam body.
4. Relieve pressure on the axle shaft snap ring and
remove snap ring.
5. Remove the axle shaft sleeve and clutch ring
assembly and inner clutch ring and bushing assembly.
6. Remove pressure spring and spring retainer
plate.
7. Remove the wheel bearing outer lock nut, lock
ring, and wheel bearing inner adjusting nut using Tool
J-6893 and A dap ter J-23446 or Tool J-6893-01.
N O T E : If the disc or other brake components
require repairs or replacement, refer to Section 5.
8. Remove the hub-and-disc assembly, outer wheel
bearing and the spring retainer plate.
a. Remove the oil seal and inner bearing cone
from the hub using a brass drift and tapping with a
h am m er. Discard the oil seal.

COMPONENT REPLACEMENT

sn ap ring, outer clutch
b. Remove the inner and outer bearing cups
using a brass drift an d hammer.
c. Clean, inspect
required.
Servicing A ctuating Parts
1. Remove actuator knob and " O " ring from
retaining plate, discard " O " ring and replace with a new
" O " ring during assembly.
2. Slide inner clutch ring an d bushing assembly
from axle sleeve and clutch ring assembly.
3. Wash all parts in solvent and air dry.
Inspect all parts for wear, cracks or broken
4.
teeth.
5. Replace all " O " rings during assembly.
6. Place new " O " ring seal on actuator knob.
Apply Lubri-plate, or equivalent, to " O " ring and place
actuator knob in retaining plate.
Installation of Hub
NOTE: All parts should be lubricated for normal
operation during assembly with an ample am ount
o f high speed grease.
applied to prevent deterioration before the unit is
placed in service.
1. Assemble the outer wheel bearing cup into the
wheel hub using Installer J-6368 and D river Handle
J-8092.
2. Assemble the inner wheel bearing cup into the
wheel hub using Installer J-23448 and D river Handle
J-8092.
3. Pack the wheel bearing cone with a high melting
point type wheel bearing grease and insert the cone into
the cup.
4. A fter lubricating the wheel bearings, install the
hub-and-disc and the bearings to the spindle.
5. Torque the inner adjusting nut to 50 foot
pounds, while rotating the hub-and-disc to seat the
bearings. Use Tool J-6893 and A dapter J-23446 or
J-6893-01. Back off the inner adjusting nut and retorque
to 35 ft. lbs. while the hub is being rotated.
6. Back off the inner adjusting nut again 3 /8 turn
maximum. Assemble the adjusting nut lock by aligning
the nearest hole in lock with the adjusting nut pin. Install
outer lock nut and torque to 50 ft. lbs. (minimum).
NOTE: Hub assembly should have .001 to .010
inch end play.
7. Install spring retainer plate (flange side facing
bearing) over spindle nuts and seat retainer against
bearing outer cup.
8. Install pressure spring into position. Large O.D.
seats against spring retaining plate.
NOTE: Spring is an interference fit. W hen spring
is seated, spring extends past the spindle nuts by
approximately 7 /8 ".
9. Place inner clutch ring and bushing assembly
and lubricate all parts
Lubrication M U ST
as
be