Front disc brakes. 1 - brake pipe, 2 - spring retainer, 3 - gasket (prevents brake squealing), 4 - inner gasket (prevents brake squealing), 5 - inner shoe, 6 - outer shoe, 7 - caliper assembly, 8 - spring (anti-rattle), 9 - pin, 10 - lining wear indicator, 11 - installation ring, 12 - cuff, 13 - piston, 14 - piston seal, 15 - hub assembly with brake disc.
Replacing brake pads
Note: The brake pads are equipped with wear indicators in such a way that when driving, when the thickness of the linings is minimal, the wear indicator touches the brake disc and the brakes make an unpleasant sound ("squeal").
1. Remove the front wheel.
2. Check the thickness of the brake pads. If it is not within the norm, replace the brake pads.
Standard thickness - 9 mm
Maximum thickness - 1 mm
3. Remove the parts listed below.
a) Spring lock.
b) Two pins.
c) A spring to prevent rattling.
d) Two pads.
d) Four gaskets to prevent brake squealing.
4. Check the thickness of the brake disc.
5. Check the brake disc runout.
6. Installing new pads.
a) Pump out a small amount of brake fluid from the reservoir.
b) Use a hammer handle or similar object to force the pistons apart.
Note: Always replace the pads on one wheel only, as there is a risk of the piston on the opposite wheel coming out.
c) Install four shims to prevent brake squealing.
d) Install two pads into the cylinder.
Note: Do not allow oil or grease to come into contact with the friction surfaces of the brake disc.
7. Install anti-rattle springs.
8. Install two pins.
9. Install the spring clip.
Removal the caliper assembly
1. Remove the front wheel.
2. Disconnect the brake hose. Drain the brake fluid into the reservoir.
3. Loosen the two mounting bolts and remove the caliper assembly.
4. Remove the following parts.
a) Spring lock.
b) Two pins.
c) A spring to prevent rattling.
d) Two pads.
d) Four spacers to prevent brake squeal.
Checking and repair
1. Measure the brake pad thickness. Replace the pads if the pad thickness is less than the limit or if the wear is uneven.
(The official source is on the portal: ToyotaMan.ru)
Maximum thickness - 1 mm
2. Measure the thickness of the brake disc. If the disc is worn or scored, or its thickness is less than the minimum value, the disc needs to be repaired or replaced.
Minimum thickness:
- normal - 11.5 mm
- ventilated - 18.0 mm
Standard thickness:
- normal - 12.5 mm
- ventilated - 20.0 mm
3. Measure the runout of the brake disc at a distance of 10 mm from the outer edge. If the runout exceeds the maximum value, replace the brake disc.
Maximum runout - 0.15 mm
Note: Before measuring the brake disc runout, make sure that the front wheel bearing runout is within the normal range.
4. Replace the brake disc if necessary.
a) Remove the front wheel hub.
b) Loosen the bolts and remove the disc from the wheel hub.
c) Install the new disc on the hub and tighten the mounting bolts.
d) Install the hub and adjust the bearing preload.
Installing the caliper assembly
1. Install the caliper assembly and tighten the two mounting bolts.
Tightening torque - 123 Nm
2. Install four squealing spacers, two pads, and a spring (anti-rattle) and two pins. Then install the spring clip.
3. Connect the brake pipe.
Tightening torque: 23 Nm
4. Fill the brake reservoir with brake fluid and bleed the brake system.
5. Check the brake system for fluid leaks.
6. Install the front wheel.