Attention! In case of serious damage (for example, when liquid leaks) it is recommended to replace the support. Supports are changed in pairs on one axle.
The procedure described below applies to both 4-cylinder and 1-cylinder calipers (these operations are specially stipulated) for front and rear brakes.
Removal, disassembly and installation
1. Loosen the fitting bolt and disconnect the brake hose.
2. Plug the hose by covering the nipple holes with a piece of rubber hose.
3. Slightly press the pistons in, unscrew the mounting bolts (indicated by arrows) and remove the caliper (see paragraphs 6–22 of subsection 8.3).
4. Remove the boot retaining ring and piston boot.
5. Carefully remove the pistons with compressed air.
6. On 4-cylinder calipers, remove the clamp bolts (indicated by arrows).
7. Remove the seals.
8. Inspect the pistons and cylinder surfaces.
9. If damage to the surface is detected (rust, potholes, scratches, etc.) replace the caliper and piston.
10. If the surface is in satisfactory condition, remove the sealing ring with plastic tweezers.
11. On a single-cylinder caliper, knock the bushings out of the bracket and remove the dust covers.
12. Wash all parts with clean brake fluid.
13. Install the rubber piston rings and pistons into the caliper, dipping them into the brake fluid. The piston should go in without tilting under moderate force.
14. Install piston boots and compression rings.
15. On 4-cylinder calipers, insert the seals into the holes, dipping them in brake fluid, and tighten the caliper halves' clamp bolts to the specified torque.
Attention! When assembling the halves, make sure that the seals do not fall out of the holes.
16. On a single cylinder caliper, lubricate the pins, bushings and holes in the bracket with silicone grease.
17. Install the covers.
18. Install the caliper in reverse order.
[The material is republished from an online website: ToyotaMan]
19. Replace the copper brake hose nipple seals (supplied in a repair kit).
20. Remove air from the hydraulic drive.
21. Before your first drive, check the operation of the brakes.