You carry out removal of a support in the following order:

block forward wheels, you will hang out and record a back part of the car on basic racks;

remove the corresponding back wheel and release the parking brake;

establish a clip on a flexible hose at a support;

weaken a nut of fastening of a brake hose, but do not unscrew it at this stage;

remove brake shoes;

disconnect a support from a brake hose. Muffle a stopper of suitable diameter the end of a hose;

if necessary unscrew the holder of a support from a back axis.

You carry out dismantling of a support in the following order:

wipe a support from dirt and dust;

establish a support by an overlay of the piston up;

by means of the lever remove a dustproof cap of the piston;

Fig. 12.14. Use of the VW 3131 tool for installation of the piston in a support

take the piston from the cylinder, using the VW 3131 tool (see fig. 12.14 );

by means of the screw-driver take a sealing ring of the piston from the support cylinder;

take a dustproof cover from the piston;

unscrew the pumping valve;

clear all details of a support alcohol or pure brake fluid and wipe them. Examine pistons and a support on wear and other damages.

You carry out assembly of a support in the following order:

apply pure brake fluid on the cylinder of a support and a cuff;

establish a cuff in a cylinder flute;

Fig. 12.16. Installation of a dustproof cover in a support flute

establish a dustproof cap on the smooth end of the piston, then press the piston into a support. The screw-driver insert a dustproof cover into a support flute ( fig. 12.16 );

Fig. 12.17. Support of the back brake mechanism: 1 – the directing finger; 2 – protective cover; 3 – holder of a support; 4 – dustproof cover; 5 – piston; 6 – cuff; 7 – support; 8 – самоконтрящиеся bolts; 9 – pumping valve; 10 – cap

install the piston 5 ( fig. 12.17 ) in an opening and fix it. The dustproof cap is fixed in a flute on the external end of the piston;

adjustment of the regulator of pressure requires the special equipment therefore charge its performance to specialists of specialized service station;

the regulator of pressure of brakes works together with the self-leveling system of a back suspension bracket. The air duct connects system of alignment to pressure regulator and if the regulator of pressure or the compressor in system of alignment have to be disconnected or be removed, it is necessary to let out compressed air from system;

apply a small amount of paste on a carving of the brake cylinder, then screw up the pumping valve in a support;

establish a new cap on the pumping valve.

Fig. 12.18. Back disk brake mechanism: 1 – pipeline; 2 – bolt; 3 – ABS sensor; 4 – arm; 5 – the directing finger; 6 – bolts of fastening of a support; 7 – protective cover; 8 – bolt; 9 – support; 10 – brake shoes; 11 – holder of a support; 12 – sealing ring; 13 – sealing ring; 14 – internal bearing; 15 – external bearing; 16 – nut; 17 – forelock; 18 – cap; 19 – blocking ring; 20 – persistent washer; 21 – bolt; 22 – brake disk; 23 – ABS sensor rotor; 24 – bolt; 25 – protective plate; 26 – pin; 27 – cable of the parking brake; 28 – spring clip

You carry out installation of a support to the sequences, the return to removal. After that remove air from the brake system. For this purpose it is enough to remove air from a support 9 ( fig. 12.18 ) which was removed. Strongly press a brake pedal to adjust back brakes.