Chevrolet LIGHT DUTY TRUCK (SERIES 10-35) Service Manual page 315

3C-28 FRONT SUSPENSION
HUB REPLACEMENT
CAUTION: See CAUTION on page 1 of
this section, regarding the fasteners in
the Mowing procedures
Replacement.
FREE-WHEELING HUBS
K10, K20, K3 0 (PART-TIME) (Fig. 3C-5K)
Hub Rem oval
1 . Turn actuator lever to set hub to "LOCK" position
(Fig. 3C-5K) and raise vehicle on hoist. Rotate tire to assure
that hub lock is engaged.
2. Remove six retaining plate bolts and remove
retaining plate, actuating knob, and "O" ring.
3. Remove internal snap ring, outer clutch retaining
ring actuating cam body outer clutch gear, and clutch
spring.
4. Relieve pressure on the axle shaft snap ring and
remove snap ring.
5. Remove the inner clutch gear.
6 . Remove spring retainer plate.
7. Remove the wheel bearing outer lock nut, lock ring,
and wheel bearing inner adjusting nut using Tool J-6893 and
Adapter J-23446 or Tool J-6893-01.
If the disc or other brake components
NOTICE:
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 hammer. Discard
the oil seal.
b. Remove the inner and outer bearing cups using a
brass drift and hammer.
c. Clean, inspect and lubricate all parts as required.
In stallatio n of Hub
All parts should be lubricated for normal
NOTICE:
operation during assembly with an ample amount of
high speed grease. Lubrication MUST be 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 Driver Handle J-8092.
2. Assemble the inner wheel bearing cup into the wheel
hub using Installer J-23448 and Driver 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. After 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 Adapter J-23446 or J-6893-01. Back off the
inner adjusting nut and retorque to 35 ft. lbs. while the hub
is being rotated.
LIG H T TRUCK SERV ICE MANUAL
COMPONENT REPLACEMENT
for Hub
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 80 ft. lbs. (K 10-20) models and 65
ft. lbs. (K30) models. 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 (K only).
10-20
Spring is an interference fit. When spring is seated,
spring extends past the spindle nuts by approximately 7/8".
. Install inner clutch gear onto the axle shaft. Press
8
in on inner clutch gear and install axle shaft snap ring.
9. Install pressure spring into position. Large O.D.
seats against spring retaining plate for K
bearing K30.
10. Install outer clutch gear, actuating cam body (cams
facing outward), outer clutch retaining ring and internal
snap ring.
11. Install "O" ring on retaining plate and install
actuating knob and retaining plate.
Install actuating knob with knob in
NOTICE:
"LOCK" position-grooves in knob must fit into
actuator cam body.
12. Install six cover bolts and seals, and torque to 35-40
in. lbs.
13. Turn knob to "FREE" position to check for proper
operation.
14. Lower vehicle to floor.
LOCKED HUBS
K10, K20, K30 (FULL-TIME)
Removal and Service
1 . Remove the hub cap and snap ring.
2. Remove the drive gear and, on K10 and K20, the
pressure spring. Place a hand over the drive gear and use
a screwdriver to pry the gear out.
3. Remove the wheel bearing outer lock nut, lock ring,
and wheel bearing inner adjusting nut using Tool J-6893 and
Adapter J-23446 or tool J-6893-01 for K10, K20; use J-
26878 for K30.
If the disc or other brake components require repairs
or replacement, refer to Section 5.
4. 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 hammer. Discard
the oil seal.
b. Remove the inner and outer bearing cups using a
brass drift and hammer.
c. Clean, inspect and lubricate all parts as required.
Installatio n
1. Assemble the outer wheel bearing cup into the wheel
hub.
a. Use installer J-6368 and Driver Handle J-8092 for
K10, K20.
b. Use J-8608 for K-30.
or wheel
10-20