9.1. Possible malfunctions of brake systems and ways of their elimination
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Possible malfunctions of brake systems and ways of their elimination
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Cause of defect
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Way of elimination
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The increased brake pedal course
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Availability of air in system of a hydraulic actuator
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To pump over system
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The persistent ring of the piston of the back wheel cylinder lost elasticity and under the influence of a coupling spring of blocks of a brake together with the piston is displaced in the cylinder
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To replace the wheel cylinder assembled
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Violation of tightness of the brake system (liquid leak)
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To define the place of leak of liquid and to replace the details influencing a leak. At a leak to improve connections in connections of pipelines or to replace sealing laying
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The increased gap between a head of an adjusting bolt of the vacuum amplifier and the piston of the main cylinder
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See <vacuum amplifier>
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The brake pedal slowly moves down at effort, invariable on it, and the tightened parking brake
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Damages of a cuff 14 (see fig. 8.3)
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To replace the damaged cuff
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Brake mechanisms of all wheels or axes rastormazhivatsya not completely (the hung-out wheels rotate hardly)
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Lack of a gap between a head of an adjusting bolt of the vacuum amplifier and the piston of the main cylinder
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See <vacuum amplifier>
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Incomplete return of a pedal of a brake after braking because of the wrong installation of the switch of a signal of braking
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To establish a gap (8+1) of mm (see fig. 7.16) between a plastic tip of the switch of a signal of braking and an emphasis on pedals
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Contamination of compensation openings of the main brake cylinder or overlapping of compensation openings edges of cuffs 14 (see fig. 8.3)
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To remove a tank of the main cylinder and connecting plugs 3 (see fig. 8.3). To clean a soft wire with a diameter of 0,6 mm compensation openings. If at the same time the wire rests against a cuff, then it is necessary to disassemble the main cylinder and to replace the inflated cuffs 14
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One brake mechanism does not rastormazhivatsya (the hung-out wheel rotates hardly)
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Jamming of the directing fingers in the basis of a forward bracket
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To replace or grease the directing fingers. To replace the damaged covers of fingers (see <replacement of the directing fingers>)
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Jamming of pistons in the case of a brake bracket
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To remove the case of a brake bracket from the basis, to remove dirt and traces of corrosion from the surface of the cylinder of the case and to grease working surfaces with NG-213 liquid or castor oil (see <repair of the brake mechanism of a forward wheel>)
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Loss of elasticity of a sealing ring of the case of a brake bracket
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To remove the case of a brake bracket from the basis and to replace a sealing ring (see <repair of the brake mechanism of a forward wheel>)
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Jamming of blocks because of strong pollution of directing basis groove
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To remove blocks and to clear the directing groove and ledges of the basis of corrosion and dirt (see <replacement of blocks of brake mechanisms of forward wheels>)
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Easing or breakage of a coupling spring of blocks of the back brake mechanism
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To replace a spring
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Jamming of pistons of the back brake mechanism because of pollution or corrosion
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To disassemble the wheel cylinder, to clear details of dirt and corrosion, to wash out, replace antisplash covers
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Swelling of sealing rings of pistons of the back wheel cylinder
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To replace sealing rings and brake fluid
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Lack of a gap between a brake overlay and a drum of the back brake mechanism because of the wrong installation of a persistent ring of automatic adjustment
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To disassemble the wheel cylinder, to eliminate a distortion of a persistent ring
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Drift or withdrawal of the car aside when braking
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Unequal pressure of air in tires
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To bring pressure in tires to norm
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Oiling of frictional slips in one of brake mechanisms
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To replace blocks or to wash out slips gasoline with the subsequent grinding by a small skin and careful removal of abrasive dust from a slip
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Teases or deep risks on a surface of a brake disk or a drum
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To repair or replace a disk or the brake drum assembled with a nave
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Leak of brake fluid in one of forward brake mechanisms or wheel cylinders
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To eliminate a leak
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Back wheels are blocked before lobbies because of malfunction of the regulator of pressure or the wrong adjustment of its drive
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To adjust or replace pressure regulator (see <adjustment of the regulator of pressure>)
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Insufficient efficiency of braking (the increased effort to brake pedals)
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Wear or oiling of brake slips
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To replace or wash out brake shoes
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Incomplete prileganiye of slips to a drum in back brake mechanisms
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To smooth out the acting places at slips. If necessary to replace blocks
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Thinness in connection of a vacuum hose
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To restore tightness of connection
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The filter 14 (see fig. 8.2) the vacuum amplifier of brakes is polluted
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To wash out the filter or to replace new
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The diaphragm 7 or 8 (see fig. 8.2) the vacuum amplifier of brakes is torn
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To replace a diaphragm
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Sealing cuffs 13 (see fig. 8.2) the vacuum amplifier of brakes do not provide tightness
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To replace cuffs and to smooth out the cylindrical working surfaces of the case of valves and a connector
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Violation of tightness in connection of a cover 6 (see fig. 8.2) with the case 11 of the vacuum amplifier
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To restore tightness
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Violation of tightness in connection of the vacuum amplifier with the case of the main cylinder
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To replace a sealing ring 12 (see fig. 8.2)
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Failure of the vacuum amplifier as a result of hit of brake fluid in a cavity of the vacuum amplifier
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To replace sealing cuffs of the main cylinder, to remove liquid from the amplifier and to replace a diaphragm
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Jingle in brake mechanisms
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Ovality or beating of a working surface of brake drums of back wheels
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To chisel brake drums assembled with a nave or to replace with new
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Breakage of springs of blocks of a disk brake
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To replace brake shoes (see <replacement of blocks of brake mechanisms of forward wheels>)
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Wear of the directing fingers of the brake mechanism of a forward wheel
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To replace the directing fingers (see <repair of the brake mechanism of a forward wheel>)
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Wear of openings under the directing fingers in the basis of a brake bracket
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To replace the basis
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Deduction of the car requires big effort on the handle of the parking brake
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Jamming of cables in the directing covers
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To disconnect cables, to clear of dirt, to grease cables and their connections with lubricant <League>
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Oiling of overlays of back brake mechanisms
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To wash out slips or to replace blocks with slips
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The parking brake is incorrectly adjusted
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To adjust the drive of the parking brake (see <adjustment of the drive of the parking brake>)
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Big course of the handle of the lever of the drive of the parking brake
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Big free wheeling of a razzhimny link of the drive of the parking brake in brake mechanisms of back wheels
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To adjust the drive of the parking brake (see <adjustment of the drive of the parking brake)
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Heating of brake drums at the movement without braking
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Wrong adjustment of a razzhimny link of the drive of the parking brake
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To adjust the drive of the parking brake
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The lowered level of brake fluid in a tank of the main brake cylinder in the absence of an external leak in a hydraulic actuator
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Wear or swelling of an external cuff 8 (see fig. 8.3) the main brake cylinder
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To remove the main brake cylinder and to replace a cuff. To merge from a cover 6 (see fig. 8.2) the vacuum amplifier brake fluid
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