We bleed the brake system when air gets into it or the brake circuits are depressurized, when replacing brake cylinders, hoses, tubes, etc., as well as when replacing fluid
You need an assistant to bleed the brakes.
This operation does not require an inspection ditch, just a clean, level area.
Replace brake fluid every 2 years of operation.
To fill the system, use glycol brake fluids DOT-4 or similar.
Before replacing brake fluid, check the tightness of the brake hydraulic drive.
For this operation you will need ring wrenches for 10, 12 and preferably a special wrench for bleeding the brakes, as well as brake fluid, a transparent hose, a transparent container (you can use a plastic bottle).
The valves for releasing air from the working cylinders of the rear wheels are made on a 10 turnkey basis, the front wheels are made on a 12 turnkey size.
The order of replacing fluid in brake mechanisms:
- - right rear;
- - left front;
- - left rear;
- - right front.
Remove the cap of the master brake cylinder reservoir
Add clean brake fluid into the reservoir to the bottom edge of the filler neck.
We brake the car with the handbrake and install shoes under the rear wheels.
If the rear wheels are suspended, first unlock the rear brake pressure regulator by inserting a screwdriver between the plate and the piston.
Don't forget to remove it after finishing work.
We clean the air release valves from dirt and remove the protective caps of the valves of the working cylinders of the front brake cylinders
Remove the protective air release caps from the rear working cylinders.
Place the rubber hose onto the air release valve of the right rear brake mechanism and immerse the end of the hose in a clean container.
We remove air from the hydraulic brake system with the engine running (so that the vacuum brake booster works).
The assistant must sharply press the brake pedal four to five times (with an interval of 1 to 2 seconds between presses), and then keep the pedal pressed.
Unscrew the air release valve ½ - ¾ turn.
Old (dirty) brake fluid will begin to flow out of the hose.
The brake pedal should move smoothly all the way to the stop at this time.
As soon as the liquid stops leaking, close the air release valve.
You need to monitor the fluid level in the tank, not allowing it to drop to the bottom mark on the tank wall.
If necessary, add new brake fluid to prevent air from entering the hydraulic drive.
This is how the old brake fluid is replaced by a new one without draining the hydraulic system.
Next, replace the brake fluid in the left lane first brake mechanism, and then in the second circuit (first in the left rear brake mechanism, and then in the right front).
Repeat these operations until the fluid in the drive is completely replaced (clean fluid without air bubbles should flow out of the hose).
After replacing the brake fluid, you need to put the protective caps on the air release valves.
Add brake fluid; its level should be between the maximum and minimum marks.
Checking the brakes.
Install the parts in reverse order.