Chevrolet 1980 Light Duty Truck Service Manual page 380

5-26 BRAKES
Fig. 5-20-Use of "C" Clamp
2. Raise the vehicle on a hoist and remove the wheel
covers and wheel assemblies. Position a 7 inch
on the caliper so that solid side of the clamp rests against
the metal part of the outboard shoe (fig. 5-20). Tighten the
"C" clamp until the caliper moves away from the vehicle
far enough to push the piston to the bottom of the piston
bore. This will allow the shoes to back off from the rotor
surfaces. Remove the "C" clamp.
3. It is not necessary to disconnect the brake hose for
shoe and lining replacement. Remove the two mounting
bolts which attach the caliper to the support bracket (fig.
Fig. 5 - 2 1-R em ovin g M ounting Bolts
5-21). Lift the caliper off the rotor and remove the inboard
shoe. Dislodge the outboard shoe and position the caliper
on the front suspension arm so that the brake hose will not
support the weight of the caliper. Remove the shoe support
spring from the cavity in the piston.
4.
inboard ears of the caliper (fig. 5-22). Next, remove the
rubber bushings from the grooves in each of the four caliper
ears.
clamp
"C"
Cleaning and Inspection
1. Thoroughly clean the holes and the bushing grooves
in the caliper ears. Wipe all dirt from the mounting bolts.
Do not use abrasives on the bolts since this will damage the
plating. If the bolts are corroded, or damaged, they should
be replaced.
2. Examine the inside of the caliper for evidence of
fluid leakage. If leakage is noted, the caliper should be
overhauled. Wipe the inside of the caliper clean, including
the exterior of the dust boot. Check the boot for cuts, cracks
or other damage. Make sure that the boot is properly,
engaged in the groove in the piston and also in the caliper
counter-bore (fig. 5-24).
NOTICE:
inside of the caliper since this may cause the dust boot
to become unseated.
3.
points to the rotor, it should be inspected and checked for
runout at this time.
Caliper Installation
1. Install rubber bushings in all four caliper ears.
NOTICE:
rubber bushings be used in order to insure the proper
functioning of the sliding caliper design.
2. Use Tool, J-22835, to install the sleeves (fig. 5-25).
Position the sleeves so that the end toward the shoe and
lining assemblies is flush with the machined surface of the
ear.
3. Install the shoe support spring by replacing the
single tang end of the spring over the notch in the center
of the edge of the shoe. Then press the two tangs at the
Fig. 5-22-Removing Sleeves
Using Tool J-22835, remove the sleeves from the
Do not use compressed air to clean the
If the vehicle has a brake problem and diagnosis
It is essential that the new sleeves and
LIG H T T R U C K S ER V IC E M ANUAL