Chevrolet 30 Series 1967 Service Manual page 235

Fig. 32—Brake Adjuster Access Hole
however, brake pedal must not be depressed
while drums are removed.
4. Unhook brake shoe pull back springs from anchor pin
and link end, using Tool J-8049 (fig. 33).
5. Remove the actuator return spring.
. Disengage the link end from the anchor pin and then
6
from the secondary shoe.
7. Remove hold-down pins and springs using Tool
J - 22348 (fig. 34).
. Remove the actuator assembly.
8
Fig. 34—Removing Hold Down Springs and Pins
Using Tool J -22348
NOTE: The actuator, pivot and override spring
are an assembly. It is not recommended that
they be disassembled for service purposes, un­
less they are broken. It is much easier to
assemble and disassemble the brakes by leaving
them intact.
9. Separate the brake shoes by removing adjusting
screw and spring.
10. Remove parking brake lever from secondary brake
shoe (rear only).
11. Clean dirt out of brake drum using care to avoid
getting dirt into front wheel bearings. Inspect drums
for roughness, scoring or out of round. Replace or
recondition drums as necessary.
12. Inspect wheel bearings and oil seal and replace any
necessary parts.
13. Carefully pull lower ekges of wheel cylinder boots
away from cylinders and note whether interior is wet
with brake fluid. Excessive fluid at this point indi­
cates leakage past piston cups requiring overhaul of
wheel cylinder.
NOTE:
A slight amount of fluid is nearly al­
ways present and acts as lubricant for the
piston.
14. If working at rear wheels, inspect backing plate for
oil leakage past axle shaft oil seals. Install new
seals if necessary.
15. Check all brake flange plate attaching bolts to make
sure they are tight. Clean all rust and dirt from shoe
contact faces on flange plate, using fine emery cloth.
Installation
CAUTION: Make certain to install recom­
mended shoe and lining assemblies. Otherwise,
series fade or permanent failure may occur.
BRAKES 5-19
CHEVROLET TRUCK SERVICE M ANUAL