Drum Brake System: Service and Repair

REAR DRUM BRAKE

Inspection and Adjustment


INSPECTION AFTER REMOVAL

Check the following items and replace if necessary.
- Check the brake lining for excessive wear, damage, and peeling.
- Check the brake shoe sliding surface for excessive wear and damage.
- Check each spring for settling, excessive wear, damage, and rust.
- Check the adjuster for smoothness, and check it for excessive wear, damage, and rust.
- Check the back plate for damage, cracks, and deformation.
- Check the wheel cylinder for cracks, damage, and leakage of brake fluid.
- Visually check the brake drum for excessive wear, cracks, and damage with a pair of vernier calipers.
- Check the drum brake component parts for excessive wear, damage, and rust.

INSPECTION AFTER DISASSEMBLY

Check the following items and replace if necessary.
- Check the wheel cylinder inner wall for excessive wear, cracks, and damage.
- Check the piston for excessive wear and damage.

INSPECTION AFTER ASSEMBLY

Check that the piston moves smoothly.

INSPECTION AFTER INSTALLATION

1.Check that the component parts of drum brake assembly are installed properly.
2.Rotate the brake drum and check that there is no drag. Perform the following procedure if necessary.
a.Remove the brake shoe. Exploded View.
b.Push the piston.

CAUTION:
Push both side of the piston simultaneously.
c.Install the brake shoe. Exploded View.
d.Operate the brake pedal with a force of 196 N (20 kg, 44 lb) for 10 strokes or more.
e.Check a drag of rear disc brake again. If any drag is found, disassemble the wheel cylinder. Disassembly And Assembly.

ADJUSTMENT AFTER INSTALLATION

Adjust the brake shoe (parking brake lever stroke). Service and Repair.