22.5.2. Models with a motionless support and two pistons


Detachment of the electric socket of wear of brake shoes on models with a motionless support with two pistons

Knocking-out of pins of fastening of brake shoes

Removal from a support of the spring which is drawing in brake shoes

Extraction from a support of brake shoes with laying

Depreciation emphasis on a brake shoe
In the presence on a brake shoe of a depreciation emphasis (b) it is not required to apply a lubricant layer on the face surface of the support plate.

At absence on a brake shoe of a depreciation emphasis apply a thin film of lubricant on the face surface of the support plate (arrow).

PERFORMANCE ORDER
1. Take from a support and disconnect the electric socket of the sensor of wear of a brake shoe. Note a sensor electrical wiring arrangement (see rice. A detachment of the electric socket of wear of brake shoes on models with a motionless support with two pistons).
2. Using the hammer and the corresponding drift, being careful, beat out pins of fastening of brake shoes and remove the spring which is drawing in brake shoes (see rice. Knocking-out of pins of fastening of brake shoes, Removal from a support of the spring which is drawing in brake shoes).
3. Take brake shoes from a support, at the same time note an arrangement of sensors of wear of brake shoes. In the presence remove the laying established between brake shoes and pistons (see rice. Extraction from a support of brake shoes with laying).
4. Measure thickness of a frictional overlay of a brake shoe and, at its wear in any point to minimum admissible thickness, replace all four front brake shoes. Also blocks need to be replaced if at least one of blocks is polluted by oil as there is no way of degreasing of brake shoes. If brake shoes are unevenly worn-out or polluted by oil, establish and eliminate the reason of it before installation of new brake shoes. Check a condition of the sensor of wear of brake shoes and, if necessary, replace.
5. If brake shoes are repeatedly established, clear them from all directions. Clear of dirt of a flute of brake slips, being careful, clear an installation site of brake shoes in the holder of a support. At installation of new brake shoes also replace the spring which is drawing in brake shoes, pins and laying.
6. Clear a support and pistons of dirt and dust. When cleaning do not inhale dust as it contains asbestos, unhealthy. Check a condition of dust protections of the ny covers established around each piston.
7. If new brake shoes are established, press pistons into a support a wooden core or the handle of the hammer. At the same time you watch that pistons did not warp, and the surfaces of pistons and protective covers were not damaged. At a vdviganiye of pistons brake fluid is forced out from brake cylinders in a popolnitelny tank therefore constantly watch liquid level in a tank, and if necessary pump out its small amount from a tank.
Prevention

For pumping out of brake fluid from a popolnitelny tank use the syringe.


8. If on a back part of brake shoes a depreciation emphasis for support pistons is established, it is not necessary to apply a lubricant layer on support plates of brake shoes. At absence on brake shoes of a depreciation emphasis grease the face surface of the support plate of a brake shoe with brake lubricant 0019891051. You apply lubricant with a thin layer and exclude hit of lubricant on overlays of brake shoes (see rice. A depreciation emphasis on a brake shoe).
9. Check that sensors of wear of brake shoes are correctly installed on support plates of brake shoes and establish laying on a back part of brake shoes.
10. Establish brake shoes with laying in a support so that the overlay of each brake shoe was established opposite to a working surface of a brake disk.
11. Establish the new spring which is drawing in brake shoes.
12. Insert pins of fastening of brake shoes, at the same time they have to pass over the spring which is drawing in brake shoes and then press them completely in a support.
13. Check placement electrical wire ки and then insert electric sockets of sensors of wear of brake shoes into a support.
14. Several times press a brake pedal that brake shoes nestled on a support. Check the level of brake fluid in a popolnitelny tank.
15. Repeat the above actions on the second wheel.
16. Establish wheels and lower the car.
17. Check the level of brake fluid.