1. Disconnect the brake fluid level sensor connector (TJ).
2. Disconnect the hydraulic pipes from the GTZ (if the car is not equipped with ABS, disconnect the pipes from the metering valves). When installing, tighten the brake pipes to 16 Nm.
3. On vehicles equipped with manual transmission, disconnect the clutch release hydraulic feed hose.
4. Close the openings of all hydraulic pipes with plugs.
5. Unscrew the nuts securing the GTZ to the vacuum booster. When installing, replace the nuts with new ones and tighten them to 18 Nm.
6. Remove GTZ in gathering.
7. Drain the TJ from the expansion tank and GTZ.
8. Installation is carried out in the reverse order. Carry out an operation to bleed air from the hydraulic system.