Contents: Cars with ABS ↓ Removal ↓
The brake system pipes are the connecting line between the master brake cylinder and the working brake mechanisms of the wheels.
Attention! The installation of metal pipes of the brake system should be entrusted to a specialized workshop, because this operation requires a certain amount of experience.
Brake hoses, designed for a certain pressure, serve as flexible connections between rigidly fixed and moving parts of the car, for example, with calipers.
If damage to the hoses appears that is visible to the naked eye, the hoses must be replaced.
Hoses with a long service life can swell so much that their internal opening becomes very narrow and the brake fluid does not return from the wheel brake cylinder to the main one, and the brakes heat up. If in this case you open the bleed nipple and the wheel is unlocked, then this is a sign of the specified defect of the brake hose.
Cars with ABS
Attention! If one of the chambers of the brake fluid expansion tank has been completely emptied, for example due to a leak or carelessness when bleeding the brake system, then air also gets into the ABS hydraulic booster pump. In this case, bleeding the brake system should be done in a workshop using a special device.
Attention! Protect brake hoses from contact with oil and kerosene, do not varnish them or coat them with anti-corrosion protection for the underbody.
Removal
1. Jack up the car and place it on jack stands.
2. Release the brake hose from the holders.
3. Disconnect the brake hose first from the main line and then from the caliper, being careful not to allow the hose to twist.
Caution! Collect any leaked brake fluid with a rag. If necessary, plug the hole in the pipe from the master brake cylinder with a suitable plug. Installation
Caution! Install only those brake hoses that are approved for use by the vehicle manufacturer.
4. Route the new brake hose so that it has slack and is not kinked.
5. Connect the brake hose to the pipe and tighten it to 14 Nm.
6. Connect the brake hose to the caliper and tighten to 35 Nm.
Caution: If necessary, replace the old sealing ring on the hose with a new one.
Attention! Bleed the brake system in a workshop using a bleeding device.
7. Lower the car onto its wheels.
Attention! Make sure that:
- a) the brake hoses are securely connected,
- b) the brake hoses are secured in the holders,
- c) the brake drive bleed nipples are screwed in,
- d) there is a sufficient volume of brake fluid in the expansion tank.
8. Perform a brake system leak test by starting the engine.
To do this, press the brake pedal with a force of 200-300 N (20-30 kg) and hold it for about 10 seconds. The pressure in the system and, accordingly, the resistance of the brake pedal, should not decrease. Check all connections for leaks.
9. Test drive and check the brakes on a lightly trafficked road.
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