Chevrolet Light Duty Truck 1973 Service Manual page 291

Fig. 47-Unhooking Pull Back Spring
. Remove the actuator assembly.
8
NOTE: The actuator, pivot and override
spring are an assembly. It is not recom­
mended that they be disassembled for service
purposes, unless 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.
Mark shoe and lining positions i f
CAUTIO N:
they are t o be r e i n s t a l l e d .
10. Remove parking brake lever from secondary brake
shoe.
Inspection
1. Clean dirt out of brake drum. Inspect drums for
roughness, scoring or out-of-round. Replace or
recondition drums as necessary.
Fig. 48-Removing Hold Down Spring and Pin
2. Carefully pull lower edges of wheel cylinder boots
away from cylinders and note whether interior is
wet with brake fluid. Excessive fluid at this point
indicates leakage past piston cups requiring
overhaul of wheel cylinder.
NOTE: A slight amount of fluid is nearly
always present and acts as lubricant for the
piston.
3. Inspect flange plate for oil leakage past axle shaft
oil seals. Install new seals if necessary.
4. 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 (fig. 49), using
fine emery cloth.
Installation
Make certain t o i n s t a l l recom­
CAUTIO N:
mended shoe and lining assemblies.
1. Inspect new linings and make certain there are no
nicks or burrs or bonding material on shoe edge
where contact is made with brake flange plate or on
any of the contact surfaces.
Keep hands clean while handling
CAUTIO N:
brake shoes. Do not permit o i l or grease t o
come i n contact with l i n i n g s .
2. Lubricate parking brake cable with Delco Brake
Lube #5450032 (or equivalent).
3. Lubricate fulcrum end of parking brake lever and
the bolt with Delco Brake Lube #5450032 (or
equivalent), then attach lever to secondary shoe
with bolt, spring washer, lock washer and nut. Make
sure that lever moves freely.
Fig. 49- Flange Plate Contact Surfaces
BRAKES 5 -2 5
LIGHT DUTY TRUCK SERVICE MANUAL