Attention! 1. Brake pads are changed only as a set for one axle.
2. Each time the drum brake shoes are replaced, the return and pressure springs of the shoes are also replaced. Due to the continuous heating/cooling that the springs are subjected to, they lose elasticity and over time the shoes touch the drums, causing them to wear out more.
1. Loosen the wheel nuts and raise the rear of the car.
2. Remove the rear wheels.
3. Remove the drum (or the hub if the vehicle is equipped with a fully unloaded axle shaft). On a car with semi-unloaded axle shafts, the drum may not be removable. In this case, pour penetrating liquid between the axle shaft flange studs and the drum holes and tap the drum from the inside along the contour.
4. If the pads interfere with removal (a groove has formed on the drum due to wear), then remove the plug from the brake shield (preventing it from falling inside the drum) and bring the pads together. To do this, move the regulator lock away from the toothed wheel and rotate the toothed wheel of the regulator counterclockwise with a screwdriver (see photo).
5. Further procedures for replacing the pads are illustrated in the photo.
6. Clean the drum and check the surface condition. Check the ovality of the drum, if there is severe damage, regrind the drum. If after regrinding the diameter is greater than the maximum, replace the drum (see photo),
7. If traces of brake fluid leakage are detected from the wheel cylinder, replace the cylinder as an assembly, or disassemble and replace worn or damaged parts.
8. Check the brake shield mounting bolts for tightness. Clean the brake shield from dirt and corrosion.
9. Install the drum. Adjust the initial clearance between the shoes and the drum. To do this, spread the shoes until they touch the drum by turning the toothed nut through the opening in the brake shield. When finished, replace the opening plug in the brake shield.
10. Install the wheel, tighten the nuts and lower the car. Check the brake pedal travel. If the brake pedal approaches the floor of the body at the end of the travel, the brakes need to be re-adjusted. After finishing, check the operation of the brakes before driving off.
(The original material is located on the website «chevyman.ru»)