Removal
1. Loosen the wheel nuts, raise the rear of the car, securely support it on stands. Block the front wheels, then remove the rear wheels.
1989 and earlier models
2. Remove the grease cap, cotter pin, lock nut and nut (see illustration).
3. Grasp the brake drum and pull it out enough to free the outer bearing and washer (see illustration). If the drum is stuck, loosen the brake adjusting sprocket as instructed in section 6, paragraphs 7 through 9.
4. Remove the outer wheel bearing and pull the hub drum off the axle.
1990 and later models
5. Unscrew the push nuts from the stud, if any, and remove the drum from the studs. If the drum is jammed, see section 6, paragraphs 7 through 9. If it still does not come off, then remove it together with the hub and wheel bearing assembly, as stated in chapter 10, Section 22.
Examination
6. Check the drum for cracks, grooves, deep grooves and traces of overheating in the contact areas of the pads. If there are blue spots on the drums indicating areas of overheating, they should be replaced. It is also necessary to inspect for traces of grease on the contact surfaces of the pads; they can be removed with denatured alcohol or a special cleaner, but contaminated pads must be replaced. A shiny, polished surface can be corrected with medium-grain sandpaper.
Note: It is recommended to treat the drum surfaces for any type of work on the brake system. This treatment will eliminate the possibility of end runout. If, as a result of wear or treatment, the maximum permissible diameter (cast on the drum) is exceeded (see figure), the drums should be replaced.
Installation
1989 and earlier models
7. After removing the hub/drum from the vehicle, clean, inspect, lubricate and replace the wheel bearings if necessary. Servicing the rear wheel bearings in chapter 1.
8. Place the drum hub assembly on the axle, install the outer wheel bearing and washer, and put the assembly in place.
9. Install the lock nut with washer, tighten the nut to the required tightening torque while turning the drum. Loosen the adjusting nut by 1/2 turn, then tighten it to the required tightening torque (see figure).
5.9. Rear wheel bearing adjustment procedure.
1. While rotating the drum, tighten the nut to 17-25 ft·lbs.
2. Loosen the nut 1/2 turn.
3. 1986 and 1987 vehicles: Tighten the nut to 10-12 in·lbs; 1988 and later models tighten the nut to 24-28 in·lbs.
4. Install the lock nut and new cotter pin.
10. Install the lock nut, cotter pin and grease cap. Be careful not to damage the grease cap.
11. Put the wheels on and lower the car.