Chevrolet 30 Series 1967 Service Manual page 219

PRIMARY
SH O E
P A W L
Fig. 2—S e lf Adjusting Brake
opposite. Two single-end wheel cylinders are arranged
so that each cylinder is mounted between the toe of one
shoe, and the heel of the other. The two-wheel cylinder
pistons apply an equal amount of force to the toe of each
shoe. Each cylinder casting is shaped to provide an
anchor block for the brake shoe heel.
The " F R -3 " brake is used on all vehicles equipped
with Eaton Rear Axles. Each brake is equipped with two-
double-end wheel cylinders which apply hydraulic pres­
sure to both th e toe
Fig. 3—Twinplex Rear Brake
1. W h e e l C y lin d e r Heat Shield
2. W h eel C ylin d er
3. W h e e l C ylin d er Push Rod
4. Brake Shoe
5. Brake Shoe Return Spring
6. Brake Shoe Hold Down Bolt
W IR E LINK
O VERRID E
LEVER
O VERRID E
S P R IN G
RETURN
S P R IN G
STAR W H E E L
and heel o f two identical
O
7. Brake Shoe Return Spring
8. Adjusting Screw Spur W h ee l
9. Brake Line
10. W h eel C ylin d er
11. Brake Shoe Anchors
Fig. 4 —W agner Type " F "
self-centering shoes. The shoes anchor at either toe or
heel, depending upon the direction of drum rotation. Both
Fig. 5—W agn er Type " F R - 3 "
1. W h eel C y lin d e r Heat
Shield
2. Upper W h eel C ylin d er
3. Anchor Pin
4. Return Spring (Short)
5. G u id e Washer
6. G u id e Bolt
7. G u id e Bolt N u t Lock W ire
BRAKES 5-3
[rp
Front Left Brake
Rear Brake
8. Brake Shoe and Lining
Assembly
9. Return Spring (Long)
10. Adjusting W h eel Lock
Spring
11. Adjusting W h eel
12. Lower W h eel C y lin d e r
13. Backing Plate
CHEVROLET TRUCK SERVICE M ANUAL