Attention! The laying of the metal pipes of the brake system should be entrusted to a specialized workshop, because this operation requires a certain amount of experience.
As flexible connections between rigidly fixed and moving parts of the car, for example, with calipers, brake hoses are designed for a certain pressure. If damage visible to the naked eye appears on the hoses, the hoses must be replaced.
Attention! Protect brake hoses from contact with oil and kerosene, do not varnish them or coat them with an anti-corrosion protection agent for the underbody.
Vehicles with ABS
Attention! If one of the chambers of the brake fluid expansion tank has been completely emptied, for example, due to leakage or carelessness when bleeding the brake system, then air also enters the ABS hydraulic booster pump. In this case, bleeding the brake system should be carried out in a workshop using a special device.
Attention! Observe the safety precautions and regulations for the use of brake fluid.
Removing
1. Mark the position of the wheels on the hubs with paint. This will allow the assembly to set the balanced wheel in its original position.
2. Loosen the wheel bolts. The vehicle must be on wheels during this operation.
3. Place the vehicle on jack stands and unscrew the wheel bolts and remove the wheels.
Attention! There is a risk of injury when the vehicle is jacked up or placed on jack stands. Familiarize yourself with the provisions of the chapter «car jacking».
4. Disconnect the brake hose from the pipeline.
Attention! On vehicles with rear drum brakes, the brake hose is located between two pipes and serves as a flexible connection.
5. Vehicles with rear drum brakes. Remove the underbody protection see relevant chapter.
6. Unscrew hollow bolt 1 and disconnect brake hose 3 from pipeline 2 (see illustration).
Attention! Twisting the brake hose when disconnecting it from the pipeline is not allowed.
7. Remove the retaining bracket 4 and release the brake hose from the holder 5 (see illustration 13.6).
Attention! After opening the brake system, brake fluid will flow out of it, which must be collected in a container designed for this.
8. Vehicles with rear drum brakes. Disconnect the other end of the brake hose from the pipeline.
9. Unscrew the hollow bolt 1 and disconnect the brake hose 2 from the caliper 3 (see illustration).
Attention! Brake fluid will flow out of the caliper connection hole. Take precautions!
Installation
Attention! Install only those brake hoses approved by the vehicle manufacturer.
10. Attach the brake hose to the caliper and secure with the hollow screw. Tighten with 20 Nm.
11. Fasten the brake hose to the holder so that the trunnion fits firmly into the holder mount.
Attention! Twisting the brake hose is not allowed.
12. Lock the retaining bracket, check the correct fit.
13. Fix a brake hose on the union of the pipeline and tighten the hollow screw. The tightening torque is 15 Nm. '
Attention! Twisting of the brake hose when it is attached to the pipeline is not allowed.
14. Vehicles with rear drum brakes. Attach the other end of the brake hose to the pipeline.
15. Remove air from the brake system, see relevant chapter.
16. Establish wheels according to the marks put at removal. Before doing this, lubricate the centering seat of the wheel disc on the hub with a thin layer of grease. Do not grease wheel bolts. Replace rusted bolts with new ones.
17. Screw in bolts of fastening of wheels and lower the car on wheels.
18. Tighten the wheel bolts in a cross pattern to 100 Nm.
Attention! The brake hoses of the front wheel mechanisms should not be pinched and frayed when the steering wheel is turned all the way to one side or the other. The hoses must be at a sufficient distance from the parts of the front suspension.
19. Check up level of a brake liquid in a broad tank and in case of need add it to a maximum mark.
Attention! Make sure that:
- A) brake hoses are securely connected;
- b) the brake hose is fixed in the holder;
- V) fittings for bleeding the brake actuator are wrapped;
- G) there is enough brake fluid in the expansion tank.
20. Carry out a leak test of the brake system with the engine running. To do this, depress the brake pedal with a force of 200-300 N (20 -30 kg) for approximately 10 seconds. The pressure in the system and, accordingly, the resistance of the brake pedal, should not decrease. Check all connections for tightness.
21. Apply a few brakes on a light road. At least one braking operation must be performed so that the ABS is activated, which is felt by the pulsation of the brake pedal.
Attention! When checking the brake system in this way, take into account the situation on the road and keep an eye on the traffic behind you.