Chevrolet 30 Series 1967 Service Manual page 240

BRAKES 5-24
Fig. 46—Measuring Points for Brake Shoe Centering
7. Using Tool J-22348
springs.
. Holding the star wheel end of the actuating lever as
8
far as possible past the star wheel, position the
adjusting lever cam into the actuating lever link and
assemble with cap screw.
9. Check the brake shoes for being centered by measur­
ing the distance from the lining surface to the edge
of the flange plate at the points shown in Figure 46.
Fig . 4 7 —Positioning Actuator Lever
install brake shoe return
A C T U A T IN G LEVER .
90
TOP VIEW
A C T U A T IN G LEVER
90c
END VIEW
Fig. 48— Plug G auge Position for C orrect Actuator
Lever Adjustment— Front or Rear Brakes
To center the shoes, tap the upper or lower end of
the shoes with a plastic mallet until the distances at
each end become equal.
10. Locate the adjusting lever .020" to .039" above the
outside diameter of the adjusting screw thread by
loosening the cap screw and turning the adjusting
cam.
NOTE:
To determine .020" to .039", turn the
adjusting screw full turns out from the fully
2
retracted position. Hold a .060" plug gauge
(from J - 9789-01 Universal Carburetor Gauge
Set) at a 90° angle with the star wheel edge of
the actuating lever. Turn the adjusting cam until
the actuating lever and threaded area on the
adjusting screw just touch the gauge (figs. 47
and 48).
11. Secure the adjusting cam cap screw and retract the
adjusting screw.
12. Install brake drums and wheels.
13. Adjust the brakes by making several forward and
reverse stops until a satisfactory brake pedal height
results.
CHEVROLET TRUCK SERVICE M ANUAL