GMC 1976 ZEO 6083 Maintenance Manual page 238

1 . Secondary Shoe And Lining
2 . Return Spring
3 . Actuating Link
4 . Guide Plate
5 . Return Spring
6 . Primary Shoe And Lining
7 . Washer
8. Clip
9 . Wheel Cylinder
10 . Pivot
11 . Strut
12 . Spring
22 21 20 19
13 . Override Spring
14 . Adjuster Lever
15 . Washer
16 . Hold Down Spring
17 . Pin
18 . Spring
19 . Nut
20 . Adjusting Screw
21 . Washer
22 . Socket
23 . Return Spring
24 . Lever
A-4129
DISC REMOVAL
1 . Siphon approximately two-thirds of the brake
fluid from the front reservoir of the master cylinder .
Discard fluid.
NOTE :
Do not empty front reservoir or it will be
necessary to bleed the brake system .
2 . Hoist vehicle and remove wheel.
3. Remove cotter pin, and drive axle nut and
washer.
Figure 1 1-Brake Assembly (Rear)
BRAKES 5- 1 9
4. Position Tool J-22269 on caliper as shown in
Figure 16 .
5. Tighten screw of tool until caliper moves out-
board far enough to push piston to bottom of piston
bore. This will allow the shoes to back off from disc
surface. Remove Tool J-22269.
6. Remove the two caliper to knuckle attaching
bolts.
7 . Carefully lift caliper assembly from disc and
position so that brake hose is not kinked or stretched.