GMC 1976 ZEO 6083 Maintenance Manual page 137

3A- 8 FRONT SUSPENSION
NOTE :
Do not empty front reservoir or it will be
necessary to bleed the brake system .
2. Hoist vehicle. Remove light nuts from wheel
studs and remove wheel.
3 : Remove cotter pin, drive axle nut and washer .
4. Position Tool J-22269 on caliper as shown in
Figure 5.
5 . Tighten screw of tool until caliper moves outboard
far enough to push piston to bottom of piston bore.
This will allow the shoes to back off from disc sur-
face. Remove Tool J-22269 .
6. Remove the two caliper to knuckle attaching
bolts. (figure 5).
7 . Carefully lift caliper assembly from disc and
reposition so that brake hose is not kinked or
stretched.
8 . Loosen uniformly and remove the three bolts
securing the retainer to the knuckle (figure 7).
9 . Position Tool No. J-24717 on hub as shown in
Figure 8 .
10. Operate slide hammer Tool No. J-2619, until
assembly is free of knuckle. See Figure 8.
11 . Remove slide hammer and Tool No. J-24717.
Figure 5-Caliper Removal
INSTALLATION
See CAUTION on Page 3A-1 of this section.
1 . Lubricate O.D. of bearing with chassis grease .
Clean bearing seat of knuckle where rust or dirt may
fall during removal.
2. The outer race of the bearing is a snug fit into
the knuckle. Light tapping on the hubs outer surface
(not the disc) will aid assembly . Care must be used
when installing hub assembly over drive axle splines
so that splines are in correct alignment.
3 . Install three bolts attaching bearing retainer to
knuckle Torque to 35 ft. lbs.
4. Install drive axle washer and nut. Torque nut
to 140 ft . lbs. If necessary to align cotter pin slot,
tighten nut and install NEW cotter pin and crimp.
Torque not to exceed 280 ft. lbs.
NOTE :
Do not back off nut to install cotter pin.
5. Replace wheel and secure with eight nuts on
studs. Refer to Section 10 for tightening sequence
and torque . Refill master cylinder with new brake
fluid.
REMOVAL
HUB BEARING
1 . Remove disc hub assembly . Refer DISC HUB
ASSEMBLY-Removal .
2. Assemble Tool No. J-23345 to Tool No. J-
8433-1
3. Position tool assembly as shown in Figure 9.
CAUTION : The gripping or pulling edge of
the tool must be under the inner race. If the
tool slips up to the bearing cage, the bearing
will be seriously damaged and need to be
replaced.
4. With Tool No. J-22214-6 in place, and a clamp
in position as shown in Figure 9, tighten center screw
until bearing is free of hub.