Parking brake (rear disc brakes). 1 - stopper, 2 - guide plate, 3 - shoe spacer plate, 4 - spring, 5 - adjuster, 6 - rear shoe, 7 - retainer, 8 - shoe return springs, 9 - retainer spring, 10 - threaded plug, 11 - brake disc, 12 - side tension spring, 13 - caliper assembly with mandrel, 14 - retainer cups, 15 - lower tension spring, 16 - front shoe, 17 - retainer, 18 - shoe spreading lever, 19 - gasket.
Disassembly
1. Loosen the mounting bolts and remove the caliper assembly.
Note: Hang the caliper so that the brake hose is not stretched or twisted.
2. Mark the brake disc and rear axle shaft and remove the brake disc.
Note: If the brake disc is difficult to remove, turn the adjuster until the wheel rotates freely.
3. Using pliers, remove the side tension spring.
4. Remove the brake shoe return springs.
5. Remove the brake shoe spacer plate together with the spring.
6. Pull back the rear shoe and disconnect the adjuster.
7. Remove the retainer parts (cups and spring), remove the rear shoe and lower tension spring.
8. Pull back the front shoe and disconnect the inner parking brake cable from the shoe release lever.
9. Remove the retainer parts (cups and spring) and remove the front shoe.
8. Remove and disassemble the parking brake bell crank (if necessary).
a) Remove the stopper using a screwdriver.
b) Remove the pin and disconnect the inner parking brake cable from the bell crank.
c) For further disassembly, see the relevant paragraph of the "Removal" subsection in the "Rear drum brakes" section.
See the source on the internet resource toyotaman.ru
Checking and repair
1. Check the parts for wear, corrosion or defects.
2. Measure the brake pad thickness. Replace the pads if the brake pad thickness is less than the minimum or if the wear is uneven.
Minimum thickness 1.0 mm
Standard thickness 4.0 mm
3. Measure the inside diameter of the brake disc. If the brake disc has scoring or wear marks, it can be rebored to obtain the maximum inside diameter.
Inner diameter:
- Standard - 210 mm
- Maximum - 211 mm
4. Check the contact of the pad with the brake disc. If the contact is not normal, the lining should be ground or the pad should be replaced as an assembly.
5. Checking and adjusting the gap between the shoe and the parking brake lever.
a) Measure the gap using a thickness gauge.
Standard clearance less than 0.35 mm
b) If the gap is not within the norm, adjust it by installing a new gasket.
Thickness of gaskets - 0.3; 0,6; 0.9 mm
c) Remove the brake shoe release lever and install a shim of the required size.
d) Install the brake shoe release lever and secure it with the stopper.
d) Re-measure the gap.
Assembly
Note: Set the parking brake for each wheel as shown in the figure at the bottom of the page.
1. If necessary, assemble and install the parking brake bell crank.
a) For assembly, see the relevant item in the "Installation" subsection of the "Rear drum brakes" section.
b) Using pliers, connect the inner parking brake cable to the bell crank through the pin and the new stopper.
2. Apply high-melting grease to the contact surfaces of the brake pad and brake shield.
3. Apply high-melting grease to the adjusting device.
4. Connect the inner parking brake cable to the brake shoe release lever located on the front brake shoe.
5. Installing the front pad.
a) Install the retainer, cups and retainer spring onto the brake shield.
b) Move the shoe to check the reliability of the retainer fastening.
Note: Do not allow oil or grease to come into contact with the friction lining surface.
6. Installing the tension spring, rear shoe and adjusting device.
a) Install the lower tension spring onto the front shoe.
b) Connect the rear shoe to the lower tension spring.
c) Install the adjusting device between the front and rear pads.
d) Install the retainer, cups and retainer spring onto the brake shield.
d) Move the shoe to check the reliability of the retainer fastening.
Note: Do not allow oil or grease to come into contact with the friction lining surface.
e) Using pliers, install the side tension spring.
7. Install the brake shoe spacer plate and spring so that the spring is facing rearward.
8. Install the front return springs first, then the rear return springs.
9. Align the marks on the rear axle shaft and brake disc and install the brake disc.
Note: If there are no marks, align the groove on the rear flange of the axle shaft with the mounting hole on the disc.
10. Connect the external parking brake cable to the crank arm assembly. Install the pin, spring washer, and secure with a cotter pin using tongs.
11. Adjusting the clearance between the drum and brake shoes for the parking brake.
a) Temporarily install the hub nuts.
b) Remove the plug from the hole.
c) Turn the adjusting device and spread the brake pads until the brake disc is braking.
d) Turn the adjuster back 8 teeth.
d) Install the plug into the hole.
12. Adjusting the position of the crank lever (if necessary).
a) Pull down the crank arm to select the clearance in the inner linkage.
b) Tighten the crank adjusting bolt until it contacts the dust seal.
c) Loosen the bolt by 1 turn and secure it with the lock nut.
Tightening torque: 5.4 Nm
d) Install the two crankshaft springs.
13. Install the caliper assembly and tighten the two mounting bolts.
Tightening torque - 103 Nm
14. Install the rear wheel.
15. Adjusting the pads and brake disc.
a) Accelerate the car to a speed of 50 km/h on a flat and dry road.
b) Press the parking brake lever button and pull the lever with a force of 88 N.
c) Under these conditions, the car should slow down and stop after approximately 400 m.
d) Repeat the above procedure two or three times.
16. Recheck and adjust the parking brake lever travel.