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Kia Sportage>> Current leaving and service>> Check of components of brake system
Check of components of brake system
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The dust formed as a result of deterioration of frictional overlays and accumulating on a surface of components of brake mechanisms, can contain hazardous to health asbestos. Do not blow off a dust the compressed air and do not inhale it! Do not use for rubbing of components of brake system solvents on the basis of gasoline! |
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Besides the regular procedures stipulated by the Schedule of routine maintenance (see Has undressed the routine maintenance Schedule), a condition of brake mechanisms it is necessary to check each time at removal of wheels or at occurrence of signs of infringement of serviceability of functioning of brake system. |
Signs of malfunctions in brake system
Колодки disk brake mechanisms are usually equipped by the special indicators notifying on excessive deterioration of frictional overlays by characteristic squeal at braking.
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At revealing of the fact of contact of indicators with brake disks колодки should be replaced immediately! |
Any of listed below signs can specify in potential defect of brake system:
At braking the car loses course stability (there is a withdrawal in one of the parties);
During braking brake mechanisms publish squeal or a scratch;
Excessively the course of a pedal of a foot brake increases;
At squeezing of a brake pedal the pulsations which have been not connected with operation ABS are felt;
Are observed leaks of a brake liquid (usually on an internal surface of wheel assemblages).
In case of detection at least one of these signs immediately examine brake system.
Brake lines and hoses
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In brake system basically steel brake tubes, except for the flexible reinforced hoses at forward wheels and as connections at the back bridge are used. Regular survey of all these lines is very important. |
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Tyre out the car on a platform / a viewing hole, or поддомкратьте it and hang out on props. Remove wheels.
Attentively examine all brake lines and hoses on presence of signs of damages, deterioration, destruction as a result of ageing of a material, traces of leaks, bends, twisting and other deformations, to the person attention giving to places of connection of flexible hoses to supports / to wheel cylinders of brake mechanisms. Estimate reliability of a tightening of all fixture, including хомутные and штуцерные connections.
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In case of need take advantage of a mirror. |
Bending шланговые sections of brake lines make sure of absence of signs of their latent damages.
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To braid hoses does not follow. |
Turning a steering wheel from an emphasis against the stop, make sure that hoses thus do not touch elements of a design of the chassis/suspension bracket of a drive/system of release, - in case of need make corresponding corrections, or correct a route of a lining of lines. Defective components replace (the Brake system) see the Head.
Study on presence of signs of development of leaks/corrosion and mechanical damages of surface ГТЦ, wheel cylinders and the pressure valve-regulator. Defective components replace.
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Disk brake mechanisms
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Replacement brake колодок should be made in the complete set for both wheels of a forward axis of the car! |
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The support of each of brake mechanisms is equipped by two колодками, - internal and external. End faces колодок are well looked through through special observation ports in the case of a support after wheel removal. |
The estimation of a residual thickness колодок is made visually through the observation ports mentioned above. If frictional overlays are worn out over an admissible limit (Specifications to the Head Brake system see), it is necessary to make complex replacement brake колодок.
If visually to estimate a residual thickness колодок it appears inconveniently, or there is a necessity for more detailed survey колодок, remove a support () and take колодки for more detailed studying (the Brake system see the Head).
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After колодки will be taken from a support, clear them by means of special means and measure a residual thickness of overlays by means of a ruler or a calliper.
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By micrometer measure a thickness of brake disks, then with the help циферблатного a measuring instrument (DTI) define size of their lateral palpation. Compare results of measurements to standard requirements (Current leaving and service see Specifications of the Head). If the thickness or size of lateral palpation any leaves disks abroad an admissible range, replace it (the Brake system see the Head). If a thickness of a disk in norm, estimate its general condition. Pay attention to such defects as deep scratches, furrows, teases, overheat traces, etc., in case of need remove a disk (the Brake system see the Head) and give it in проточку. The worn out or deformed spring clamps колодок also are subject to replacement.
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Drum-type brake mechanisms
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Replacement of brake boots should be made in the complete set for both wheels of a back axis of the car! |
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Remove brake drums (the Brake system see the Head).
Make careful cleaning of brake mechanisms with application of special cleaning structure.
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At all do not blow off a brake dust from a surface of components the compressed air and do not inhale it is a dust can contain asbestos harmful to your health! |
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Estimate a residual thickness of frictional overlays of forward and back brake boots, check up components on presence of traces of pollution by a brake liquid and oil. If the frictional overlay acts over heads of rivets less than on 1.6 mm, boots are subject to replacement in the complete set for brake mechanisms of both wheels (the Brake system see the Head). It is necessary to replace boots also in case of revealing of cracks, заполированных to shine of sites of overlays, or traces of hit of a brake liquid.
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Make sure of correctness of connection and serviceability of a condition of all springs of assemblage of the brake mechanism (the Brake system see the Head), - the neglect replacement of the deformed or weakened springs is fraught with premature deterioration of boots as a result прихватывания brakes.
Check up assemblage components on presence of traces of leaks of a brake liquid. Cautiously having hooked a finger or a small screw-driver, remove rubber пыльники from the wheel cylinder which is holding apart the top ends of boots. Revealing of any signs of leaks in these parts demands carrying out of immediate regenerative repair of assemblage of the cylinder (the Brake system see the Head). Also check up on presence of traces of leaks brake hoses and them штуцерные connections.
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Carefully wipe internal surfaces of a drum the pure rags impregnated with methyl spirit, - try not to inhale a brake dust. Examine a working surface of a drum on presence of cracks, задиров, traces of an overheat and other damages. If defects cannot be removed by processing of a surface by a fine-grained emery paper, it is necessary to give a drum for проточки to a car-care centre workshop, or to replace (the Brake system) see the Head. Measure internal diameter of a drum. In case of need measure diameter of the boots planted in brake assemblage (see in the same place), then, by subtraction of result of the second measurement from result of the first, define size of a working backlash of the brake mechanism.
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Repeat procedure for components of the opposite brake mechanism. Establish into place drums, fix wheels and lower the car on the earth. Tighten wheel nuts with demanded effort.
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Check of a lay brake
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Park the car on an equal horizontal platform, translate RkPp/At/razdatochnuju a box in neutral position and release a lay brake, - the car should move manually without the resistance caused by action of back brake mechanisms.
Cock the lever of a lay brake on 1 click and repeat check, - the car should not move.
Completely cock the lever of a lay brake: the maximum admissible length of a course of the lever should not exceed 10 clicks of a ratchet, otherwise adjust a lay brake (the Brake system see the Head).
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