Unscrew the wheel bolts.
Support the car from behind.
Rotate the rim or brake drum so that the hole for the wheel bolt is in front at the top.
Press the adjusting key up with a screwdriver through the hole for the wheel bolt - this will compress the brake pads.
Remove the wheel bearing grease cap.
Straighten the wheel bearing retaining pin and pull it out.
Pull off the crown retainer. Loosen hex nut, remove thrust washer and outer wheel bearing.
Pull off the brake drum.
When assembling, adjust the play of the wheel bearing.
Press the brake pads against the drum by pressing the brake pedal hard several times.
Attention. If in older cars the rusted adjusting key is not pressed down, you need to have an assistant press the brake pedal while pushing the key up. Release the brake pedal and remove the screwdriver from the brake drum, otherwise the key will slide down. Please note that the pedal must only be depressed when both brake drums are fitted.
Checking the condition of the brake drums
The sliding surface of the brake drum should be as smooth as possible.
If deep furrows and notches are found (due to worn-out brake pads), then the drum can be regrinded.
After grinding, the inside diameter of the drum must exceed the nominal diameter by 1 mm, otherwise both brake drums must be replaced.
For reground brake drums, thicker brake pads must be used.
Removing the brake pads
Disassembled elements of a drum brake
1 Front brake shoe
2 Holder with spring plate and locking pin
3 Push rod
4 Upper spring
5 Adjusting key
6 tension spring
7 Lower return spring
8 Adjacent spring
9 Parking brake lever
10 Brake lining on the rear brake shoe
11 Holder. Arrows indicate where the springs hitch when installed
Remove brake drum.
Turn the spring plate 90°with pliers, pressing it lightly (holding the locking pin on the rear shield of the brake mechanism from turning) and remove it along with the spring. Unhook the adjusting key return spring.
Pull the brake pads out of the lower support and pistons of the wheel brake cylinder. Unhook the adjusting key return spring.
Pull the brake pads out of the lower support and pistons of the wheel brake cylinder. Disconnect the parking brake cable from the parking brake lever.
Remove the top and bottom return springs. Pull the adjusting key out of the push rod.
Detach the attached spring from the top of the pressure rod. If necessary, clamp the pressure rod in a vice to do this.
When assembling, compress the push rod in a vise. Hook the adjacent spring to the pressure rod and brake shoe.
Install the brake shoe on the push rod. Insert the adjusting pin from above. Its nose should point to the brake shoe.
Insert secondary lever (rear) brake shoe into the depression of the pressure rod, attach the upper return spring.
Attach the parking brake cable to the brake lever with the brake shoes not yet installed.
Removing the drum brake cylinder
Remove brake drum.
Remove brake pads.
Open the air bleed valve. Unscrew the brake pipe. Since the new brake cylinder will not be installed immediately, the brake pedal must be depressed and held to avoid wasting fluid.
Unscrew the two mounting bolts on the back of the brake shield and remove the cylinder.
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