Chevrolet 10 Series 1970 Service Manual page 263

F ig . 4 8 —M easurin g Points fo r Brake Shoe C e n te rin g
Holding the star wheel end o f the actuating le v e r as
fa r as p ossib le past the star wheel, position the
adjusting le v e r cam into the actuating le v e r link and
assem ble with cap screw .
Check the brake shoes fo r being cen tered by m easu r­
9.
ing the distance fro m the lining surface to the edge
o f the flange plate at the points shown in F igu re 48.
To cen ter the shoes, tap the upper o r lo w e r end of
the shoes with a p lastic m a llet until the distances at
each end becom e equal.
F ig . 4 9 — P o s itio n in g A c tu a to r Lever
ACTUATING LEVER---------►
9 0 '
TOP VIEW
ACTUATING LEVER
END VIEW
Fig. 5 0 —Plug G au ge P os itio n in g fo r C o rrre c t A c tu a to r
Lever A d ju s tm e n t—Front and Rear Brakes
10. Locate the adjusting le v e r .020" to .039" above the
outside d iam eter o f the adjusting sc re w thread by
loosening the cap s c rew and turning the adjusting
cam.
NOTE: To determ ine
adjusting s c rew 2 fu ll turns out fro m the fu lly
retra cted position.
(fro m J-9789-01 U n iversa l C arbu retor Gauge
Set) at a 90° angle with the star w heel edge o f
the actuating le v e r . Turn the adjusting cam until
the actuating le v e r and threaded area on the
adjusting sc re w just touch the gauge (fig s . 49
and 50).
11. Secure the adjusting cam cap sc re w and re tra c t the
adjusting screw .
12. Install brake drums and w heels and rem o ve veh icle
fro m jack stands.
13. Adjust the brakes by making s e v e ra l fo rw a rd and
r e v e r s e stops until a sa tisfa cto ry brake pedal height
resu lts.
BRAKES 5-25
.020" to .039", turn the
Hold a .060" plug gauge
CHEVROLET TRUCK SERVICE MANUAL