How can one brake the brakes?

Bleeding hydraulics of the car brake systemmust be done on schedule, with oil change, and after every work with the brake system: whether it's tuning, repairing or replacing consumables. Usually, the brakes are pumped in car-care centers, because it's a simple and inexpensive service, and you do not want to get dirty in the brake fluid. But if you are pleased to service your car yourself, or go to the car service there is simply no possibility - you can pump the brakes yourself, as we already wrote about here. But not always there is a comrade ready to help, and then you have to manage yourself. Below are two ways how one to pump the brakes.

Method one

Preparation

For the first method, you need the following:

  • capacity for draining an old brake fluid (a half-liter bottle or a can)
  • The hose of a suitable diameter
  • Clean rag to clean the fittings
  • vehicle operation manual
  • new brake fluid with spare
  • WD-40 (in case the brake bleeding nipples are acidified)
  • a key for pumping the brakes or a regular horn key for unscrewing the fittings (a special key for the fittings will save the faces when the nipple is tight)

And instead of an assistant you will need to find a reliablestop for the brake pedal. Any log, or anti-theft wheel lock will do. The lock can be inserted between the brake pedal and the driver's seat.

Prorolling

Look for a brake flow diagram for yourvehicle in the owner's manual. If there is no circuit or manual, follow the standard procedure for bleeding the brake channels: starting from the far wheel from the master cylinder (GTZ). Usually distant - the right rear, respectively, the order is as follows: right rear, left rear, right front, left front.

  1. Fill the GTZ tank with a new brake fluid to the mark and close it tightly with the lid.
  2. Check that all the fittings are loosely loosened. If not - moisten the WD-40 sour fittings and wait for them to turn off.
  3. Clean the fittings from dirt with a clean rag.
  4. Put the hose on the first, far from the GTZ one end, and lower the second into the prepared container for draining.
  5. Press the brake pedal several times, squeeze outit into the floor and fix it with a spacer: in this way you will create a high pressure in the hydraulic circuit of the brake system, which will squeeze out the old brake fluid through the union with the air.
  6. Unscrew the nipple so that an old brake fluid with bubbles will drain out of the system. Wait until all air bubbles come out of the channel.
  7. When the liquid begins to flow without bubbles, tighten the union.
  8. Repeat the previous manipulations with the threeremaining nipples in this order. If the brake fluid stops flowing through the union - it means the system has dropped pressure. In this case, it is necessary to tighten the union and press the brake pedal several more times, also fixing it after this spacer.

When pumping the system, do not forget to follow thelevel of a brake liquid in a tank of the main brake cylinder and to keep it filled. If the tank is empty, pressing the brake pedal may cause air to enter the system.

Method of the second

Preparation

You will need:

  • a cover of a tank of coupling with a rubber lining (it is possible to buy in shop of auto parts)
  • valve from a tubeless tire without a nipple (nipple)
  • sealant
  • Hose suitable for the valve diameter
  • The hose of a suitable diameter for draining
  • new brake fluid with spare
  • vehicle operation manual
  • Clean rag to clean the fittings
  • drainage tank for old brake fluid
  • WD-40
  • a key for pumping the brakes or a regular horn key for unscrewing the chokes
  • pumped up to 2 atmospheres of reserve or compressor for injection into the tank of GTZ air

Unlike the previous method, increasedThe pressure in the system is created not by pressing the brake pedal, but by injecting air into the reservoir of the master cylinder. For air injection, you have to make a special lid for the tank.

  1. Drill a hole with a diameter of about 11-12 mm in the clutch reservoir.
  2. Insert a valve from the tubeless tire into the hole and secure it to the cover with a sealant.
  3. Allow the sealant to freeze.
  4. Put one end of the hose on the valve.

Prorolling

Look for a brake flow diagram for yourvehicle in the owner's manual. If there is no circuit or manual, follow the standard procedure for bleeding the brake channels: starting from the far wheel from the master cylinder (GTZ). Usually distant - the right rear, respectively, the order is as follows: right rear, left rear, right front, left front.

  1. Fill the GTZ tank with a new brake fluid to the level and close it tightly with the hose cover.
  2. The free end of the hose is put on the reserve stock and tightened with wire so that it does not etch air / connect it to the compressor.
  3. Check if all the fittings are loosely loosened. If not, moisten the WD-40 sour fittings and wait for them to turn off.
  4. Put the drain hose on the first, far from the GTZ one end, and lower the second into the prepared container for draining.
  5. Unfasten the wire and straighten the hose so that the air from the tire starts to flow into the GTZ tank / turn on the compressor (the required pressure is from one and a half to two atmospheres).
  6. Unscrew the nipple so that an old brake fluid with bubbles will drain out of the system.
  7. When the liquid begins to flow without bubbles, tighten the union.
  8. Close the air pressure in the tank of GTZ
  9. Repeat the previous manipulations with the three remaining fittings in this order.

As with the first method, it is important to monitor the level of the brake fluid in the reservoir of the master cylinder and, if necessary, add a new one.

Both of these methods are suitable not only for pumping(exhaust air from the brake system), but also for flushing the brake circuit and completely replacing the old brake fluid with a new one. To replace the liquid in the system, while pumping and draining the old liquid, wait until a new, clean liquid flows from each nozzle. A new liquid can be distinguished by its color and consistency.

We remind you that if after pumping the systemthe brake pedal all the same gives a "soft" course, then this is an excuse for diagnosing the brake system. The cause of this pedal behavior can be the wear of pads or disks.



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