Contents: Removal ⇓ Installation ⇓
Note: If the master cylinder is faulty, replace it. The manufacturer does not recommend repairing the master cylinder.
Removal
1. The master cylinder is located in the engine compartment and is attached to the vacuum booster housing.
2. If your vehicle is equipped with a cruise control system, disconnect the system actuator and place it nearby.
3. On models with a manual transmission, disconnect the clutch hydraulic supply hose from the brake fluid reservoir.
4. Remove as much brake fluid as possible from the reservoir (using a syringe or douche).
Warning. If you use a culinary syringe, do not use it for cooking.
The original article is posted on [MazBook.ru]
5. Place a rag under the master cylinder and prepare plugs to seal the lines.
Warning. Brake fluid corrodes paint. Cover all painted surfaces and be careful not to spill brake fluid on them.
6. Disconnect the lines from the master cylinder (figure 8.6) using a spanner, move them aside and plug them with plugs (to prevent contamination).
7. Disconnect the low brake fluid level indicator switch wiring connector, then remove the master cylinder to booster mounting nuts (figure 8.7). Remove the master cylinder from the studs and remove it from the engine compartment. Be careful not to spill brake fluid.
Installation
8. Before installing on the vehicle, bleed the master cylinder. To do this, secure the master cylinder in a vice, clamping it by the flange.
9. Insert two bleeder tubes into the cylinder outlet ports (figure B.9).
10. Fill the reservoir with the recommended type of brake fluid (see chapter 1).
11. Slowly push the cylinder pistons down (a large Phillips screwdriver is suitable for this). In this case, air will be forced out of the cylinder and into the tank. Since the tubes are immersed in brake fluid, air will not be able to escape into the cylinder on the return stroke of the pistons.
12. Repeat this procedure until. until air bubbles stop coming out of the tubes.
13. Remove the tubes (one by one) and insert plugs to prevent brake fluid leakage. Place the cap on the master cylinder reservoir.
14. Install the master cylinder onto the vacuum booster studs and tighten the cylinder mounting nuts by hand.
Note: Don't forget to install a new gasket.
15. Connect the brake system lines to the master cylinder. If necessary, rock the master cylinder to facilitate screwing in the pipe mounting fittings.
16. Tighten the master cylinder mounting nuts to the specified torque, then tighten the pipe fastenings.
17. Fill the reservoir with brake fluid, then bleed the master cylinder and brake system (see paragraph 10). To bleed the master cylinder in a car, you will need an assistant. Ask him to press and hold the brake pedal. Loosen the hose connection and allow the fluid and air to escape from the cylinder. Repeat this procedure for both lines until no more brake fluid containing air bubbles comes out of the master cylinder.
Warning. Brake fluid corrodes paint. Cover all painted surfaces and be careful not to spill brake fluid on them. After bleeding is complete, immediately remove all traces of bleeding brake fluid.
18. Check the operation of the brake system before driving.
Warning. Do not drive on the road if you are not sure that the braking system is in good working order.