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Checking the brake system components
 | The dust resulting from wear of the friction linings and adhering to the surface of the brake components may contain hazardous asbestos. Do not blow off the dust with compressed air and do not inhale it! Do not use for cleaning brake components based solvents gasoline! |
 | In addition to the regular procedures specified routine maintenance schedule (see. Section routine maintenance schedule) ?�
state brakes should be checked each time the wheels are removed, or when signs of infringement of serviceability of functioning of brake system. |
Signs of problems in the braking system Pads disk brake mechanisms are usually equipped with special indicators are notified of excessive wear of the friction linings characteristic squeal during braking. | In identifying indicators of the fact of contact pads to the brake discs must be replaced immediately! |
Any of the following signs may indicate a potential defect in the braking system: - When braking, the car loses directional stability (withdrawal takes place in one of the parties);
- During braking, the brakes squealing or creaking issue;
- Excessive increases foot brake pedal;
- When squeezing the brake pedal pulsations are felt not associated with operation of ABS;
- Observed leakage of brake fluid (usually on the inner surface of the wheel assemblies).
In the event that at least one of these symptoms immediately inspect the brake system. Brake lines and hoses | The braking system is mainly used steel brake tubes, except flexible reinforced hoses have the front wheels and as the compounds of the rear axle. Regular inspection of these lines is very important. |
| - Drive the car on the overpass / viewing hole or Poddomkratte and post it on props. Remove the wheels.
- Inspect all brake lines and hoses for signs of damage, wear and tear, damage due to aging of the material, traces of leaks, bending, twisting and other deformations, focusing especially on the point of connection of flexible hoses to calipers / wheel cylinders brake. Rate the tightness of all fasteners, including Stirrup and couplings.
| If necessary, use a mirror. |
- Inflection hose section of brake lines, make sure there are no signs of hidden damage.
| Twist the hose should not be. |
- Turn the steering wheel from lock to lock, make sure that the hoses do not interfere with the structural elements of the chassis / suspension / steering gear / exhaust system, - if necessary, make appropriate corrections or Adjust the route of the line. Defective components replace (see chap. Brake System).
- Examine for signs of leaks / corrosion and mechanical damage to the surface of the GTZ, wheel cylinders and pressure control valve. Defective components replace.
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Disc brakes | Replacement of brake pads should be done in a set for both wheels of the front axle of the car! |
 | The support of each of the brake is equipped with two blocks - internal and external. The ends of the pad can be easily seen through a special viewing window in the housing of a support after the removal of the wheels. |
Evaluation of the residual thickness of pads is done visually through the above-mentioned observation windows. If the friction linings are worn more than the permissible limit (see. Specifications to the Head Brake system), you must produce a comprehensive replacement of brake pads. If a visual estimate of the residual thickness of the pad is difficult, or there is a need for a more detailed inspection of pad, remove the caliper (s) and remove the pads for a more detailed study (see chap. Brake System). |  | - Once the pads are removed from the support, clean them using the special tools and measure the residual lining thickness using a ruler or calipers.
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  | - Micrometer, measure the thickness of the brake disc, then use the dial gauge (DTI), determine the magnitude of the lateral runout. Compare your results with the regulatory requirements (see. Specifications of the Head Current leaving and service). If the thickness or the amount of lateral runout of any of the disks is out of the acceptable range, replace it (see chap. Brake System). If the thickness of the disc is normal, rate it overall. Pay attention to the defects such as deep scratches, grooves, burrs, traces of overheating, etc., if necessary, remove the disk (see chap. Brake System) and give it to the groove. Worn or deformed retaining clips pads also be replaced.
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Drum brakes | Replace the brake shoes should be made to complete the two wheels of the rear axle of the car! |
| - Remove the brake drums (see chap. Brake System).
- Perform a thorough cleaning of brake mechanisms with a special cleaning agent.
| In no case do not blow off brake dust from the surface of the components with compressed air and do not inhale it - dust can contain harmful asbestos to your health! |
 | - Rate the residual thickness of the friction lining the front and rear brake shoes, check the components for signs of contamination of the brake fluid and oil. If the friction lining extends above the heads of rivets less than 1.6 mm, the shoes should be replaced as a unit for brake both wheels (see chap. Brake System). The shoes should be replaced in case of detection of cracks, zapolirovat polished sections pads or traces of brake fluid.
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- Make sure all connections and health status of all the spring brake assembly (see chap. Brake System), - disregard for the replacement of deformed or weakened springs fraught with premature wear shoes as a result of "tacking" the brakes.
- Check the components of the assembly for signs of leakage of brake fluid. Gently prying fingers or a small screwdriver, remove the rubber dust caps from the wheel cylinder, Expander upper ends of the shoes. Identify any signs of leaks in these areas requires immediate reconditioning cylinder assembly (see chap. Brake System). Also check for signs of leaks brake hoses and couplings.
 | - Carefully wipe the internal drum surface impregnated with methyl alcohol with a clean cloth - avoid inhaling brake dust. Inspect the work surface of the drum for cracks, burrs, traces of overheating or other damage. If the defects can not be removed by treating the surface with fine sandpaper, the drum should be given to the bore in the studio car service or replace (see chap. Brake System). Measure the inner diameter of the drum. If necessary, measure the diameter of the brake assembly planted in shoes (ibid.), Then by subtracting the result of the second measurement result from the first, determine the value of the working air gap of the brake mechanism.
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- Repeat for the opposite brake components. Replace the drum, secure the wheels and lower the car to the ground. Tighten the wheel nuts with demanded effort.
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Checking the parking brake | - Park the car on a level surface, set the Manual transmission / AT / transfer case into neutral and release the parking brake - the car must be shifted manually without resistance caused by the action of the rear brakes.
- Cock the parking brake lever on one click and repeat the test, - the car does not move.
- Fully cock the parking brake lever: The maximum permissible length of lever travel should not exceed 10 clicks of a ratchet, otherwise adjust parking brake (see chap. Brake System).
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