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Check brake system and coupling
 | Dust generated by wear pads and adhering to brake components may contain hazardous asbestos. Do not Blow the dust by means of compressed air and do not inhale it! Do not use solvents to remove dust on the basis of gasoline. |
 | In addition to inspections at specified intervals condition of brake mechanisms should be made each time the wheels are removed, or when signs of failure in the brake system. Checking the brake fluid level is described in Section Check of levels of liquids, the control of leaks. |
Signs of problems in the braking system Any of the following signs may indicate a potential defect in the braking system: - When squeezing the brake pedal while driving "takes" on one side;
- Brakes braking issue scraping or squealing noises;
- The brake pedal stroke is excessive;
- The brake pedal pulsates (this is normally only when the system is ABS);
- Observed brake fluid leak (usually marked on the inner side of the tire or wheel)
In the event that at least one of these symptoms immediately inspect the brake system. Brake lines and hoses | The brake system is mainly used metal brake tubes, except the flexible reinforced hoses at the wheel. Regular inspection of these lines is very important. |
| - Park the vehicle on level ground.
- Poddomkratte car and establish it on props, and then remove the wheel. Check the vacuum hoses, refer to Section Check and replacement of hoses and tubes in the engine compartment, localization of leaks.
- Check all brake lines and hoses for cracks and abrasions in their outer coating, as well as leakage, blisters and strains. Check the brake lines at the front and rear of the vehicle for signs of softening, cracks, deformation or wear caused by friction of the other details. Check all couplings for signs of leaks and make sure all fasteners to secure the brake lines.
- Bend your arms at one and the other side of the brake hose to detect damage. Twist the hose should not be.
- Turn the steering wheel left and right until it stops. Make sure the hoses do not interfere with the structural elements of the vehicle.
- Upon detection of fluid leakage from the brake lines, or damage to the leak should be repaired immediately. For a more detailed description of the procedures for repair brake system, refer to Chapter Brake System.
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Check the thickness of the brake pads and discs | - Poddomkratte car and establish it on props, then remove the appropriate wheel.
| Experience shows that due to the presence of dirt on the edge of the road, brake pad wear the right wheel is greater than the left. Therefore, it makes sense to check to remove the front right wheel. |
 | - Thickness measurement pads front disc brake is made through a special check box in the caliper. If the thickness of the pads is less than 2 mm, replace all the pads of both front wheel brakes.
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| Typically, 1 mm wear of the brake shoe friction lining corresponds to at least 1000 km of run under adverse operating conditions. Under normal circumstances pads are cleared more slowly. |
 | - To check the thickness of the back pad (drum) brakes Poddomkratte car and inspect the pads inside the disc. If in doubt, measure the thickness of the pads when removing the brake drum. If it is less than 1.5 mm, replace all the pads of both rear brakes.
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- Check the brake calipers for leaks. If leaks are repaired urgently support.
- Visually inspect the brake discs and drums from inside and outside the presence of fissures, cracks and rust. Defective components replace.
- Measure the thickness of the brake discs in several places with a micrometer or a special caliper. You can also measure the thickness of the brake disc caliper conventional, enclosed on either side of the lining of the known value (for example, two coins), and then subtracting the measured value of the thickness of shims.
- Measure the inner diameter of the brake drum.
- Compare the minimum of the obtained results in each case with the requirements of the Specifications. If the wear limit is reached, replace necessarily both brake disc or drum. Brake disc / drum should be replaced, and also for large cracks or deep grooves on the working surface.
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Check and adjustment of brake and clutch pedals and handbrake |  | - Measure the freewheel (A) and height (H 1) the brake pedal.
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- Make similar changes to the clutch pedal.
- If the measured values do not meet the requirements of the Specifications, adjust the brakes in accordance with the illustration. To do this, give the locknut, screw or unscrew the sensor position corresponding to the pedal and secure it with a lock nut.
- Cock a lay brake, pull the lever to its drive to force 196 N. This should hear clicks 11-12. Otherwise, adjust the parking brake, as described below.
 | - Insert the socket wrench into the gap in the parking brake lever and give a nut to completely loosen the parking brake cable. Release the parking brake lever.
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- Depress the service brake 2-3 to select brake pads gap.
- Rotate the rear wheel, make sure their smooth running.
- Pull the parking brake lever that has been available adjusting nut, and adjust by rotating the parking brake.
| Give nuts again after its use is not allowed. |
- Cock a lay brake 3-4 times with the force of 196 N, make sure it is properly adjusted. Then, when the released the parking brake, make sure the smooth progress of the rear wheels.
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Check the brake servo | - With the engine off several times depress the brake pedal - with each pressing its course should be reduced.
- When depressed the brake pedal, start the engine, - the pedal should to go down.
- Hold the brake pedal depressed, stop the engine. When the pedal is held for 30 seconds it does not change its course, the vacuum in the order of the amplifier.
- If one of the above checks give unsatisfactory results, repair or replace the vacuum amplifier (see chap. Brake System).
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Checking the tightness of the check valve of the vacuum amplifier |  | - Verification is done by connecting the hand vacuum pump to the opposite sides of the control valve and creating a vacuum in it.
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- When connecting the pump from the vacuum booster (1) and creating a negative pressure of 66.7 kPa, it may be reduced to 1.3 kPa in 15 seconds.
- When connecting the pump to the motor (2) there should be no vacuum.
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