Chevrolet 10 Series 1968, Service Manual

Page: 276 / 713

BRAKES 5-33
F ig . 59—Type “ F R -3 A ” S e lf A djusting Brake Components
1. C over Adjuster Slot
2. Screw , Lock Washer,
C ylin d e r Mounting
3. Cover, Wheel C ylin d e r
4. W heel C ylin d e r
5. Screw , W heel C ylin d e r
Bleeder
6. Pin, Forw ard-acting Aachor
7. Screw , Starwheel Adjuster
8. Starw heel, Shoe Adjuster
9. Bolt, C a rria ge , Shoe
Hold-down
10. Washer, Shoe Ho Id-down
11. N u t, C astellate d , Shoe
Hold-down
12. Lockw ire, Hold-Dow n Nut
13. Spring, Long Shoe Retracting
14. Spring, Short, Shoe Retracting
15. Brake Shoe
16. Brake Lining
17. Rivet, Brake Lining
18. Hex Ecce n tric, Autom atic
Adjuster
19. Screw , Eccentric Se lf-Tap p in g
20. Crank Assem bly, Starwheel
21. Lin k, Long, Starwheel Crank
22. Cran k, Autom atic Adjuster
Anchor
23. “ C " Washer, Anchor Crank
24. Link Short, Anchor Crank
25. Spring, Autom atic Adjuster
4. Install the adjuster hex eccentric on each shoe web,
tightening the self-tapping screw only finger tight to
permit final adjustment of eccentrics.
5. Locate anchor cranks on anchor pins, the long arms
toward shoes, bushing toward backing plate, so that
they rotate freely while resting against retracting
spring hooks. Install and crimp the C-washers. At
each crank, assemble the short link small hook in­
to the short arm of the crank from the lower side
and hook other link end around the eccentric on the
shoe web. Assemble long link S-hook to long arm of
crank from upper side, rotate starwheel crank so
that slot lines up with link U-hook, insert U-hook and
rotate starwheel crank back to approximate adjust­
ing position. Install adjuster spring with short hook
on starwheel crank finger so that its long shank hook
assembles on the upper groove of the spring retainer
pin from the wheel cylinder side.
6. Adjust brakes--Initial manual lining adjustment.
a. Back off starwheel adjustments.
b. Center each shoe: Take care not to mar lining.
Insert pry tool against backing plate curl and shoe
and slide shoe up or down in anchor slots until
leading and trailing edges of the lining are equal
distance from the inner curl of the brake backing
plate.
c. Set adjuster hex eccentric on each shoe web. Ro­
tate hex eccentric until linkage aligns starwheel
crank pawl with center line of adjuster screw. _A
CHEVROLET TRUCK SERVICE MANUAL