6.3. System of brakes of work
Amplifier of vacuum of brakes
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Fig. 6.7. Amplifier of vacuum of brakes: 1 – they inhale the hose; 2 – backpressure valve; 3 – collar; 4 – axle of empurrador; 5 – lavador; 6 – bumps his head; 7 – knot of pedal of brake; 8 – inhale the amplifier of brakes; 9 – cylinder of main brake
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In the moment of the failure of the amplifier of vacuum the effort to a brake pedal considerably increases this negatively affects the driving. The repair of the amplifier of vacuum needs the special instrument, therefore, it is recommended to substitute it joined.
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PREVENTIONS
In the moment of the removal of the main brake they do not transport the cylinder too much far also the damage of oil pipelines of brake.
Do not allow the blow of fluid of brake in a detail of the car. It can damage a painting and the covering of varnish of a body. In the moment of the blow of liquid in a painting and the covering of varnish of a body immediately it is taken away by them while washing water.
Since the prevention of the passage of fluid of brake rolls up connections of rags of hoses or napkins.
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Removal
Withdraw the filter of air.
Withdraw a cork of a tank of a hydraulic acionador of brakes and withdraw with the syringe or another liquid of adaptation of a tank.
Desconecte oil pipelines of brake of the cylinder of main brake.
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PREVENTION
Take steps against the blow of fluid of brake in surrounding details.
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Fig. 6.9. Elements of a hydraulic acionador of the system of brakes of work: 1 – they inhale the amplifier of brakes; 2 – inhale the hose; 3 – pressure regulator (in cars without antiblockading the system of brakes); 4 – brake oil pipelines
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Withdraw the cylinder of main brake of the amplifier of vacuum, having put out nuts of his fixation (fig. 6.9).
Desconecte an empurrador of a pedal of brake.
Put out nuts of hair clips of hair of the fixation of the amplifier of vacuum of brakes.
Check of Repair of the valve backpressure of the brakes amplifier
It executes an inspection in the valve backpressure installed in a vacuum hose.
Withdraw a hose of vacuum of the amplifier of brakes.
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TO OBSERVE
The valve backpressure is installed with a tension in a vacuum hose in the etiquettes agreement.
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Check the Repair of the valve backpressure through the vacuum bomb.
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PREVENTION
In case of the bad functioning of the valve backpressure they substitute it joined with a vacuum hose.
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Installation
Establish the amplifier of vacuum of brakes and hold tight nuts of fixation the specified moment.
Moment of an inhalation of nuts of hair clips of hair of fixation of the amplifier of vacuum of brakes of 8-12 N · m.
Apply the lubricant at the place of the contact between a pedal of a brake and an empurrador.
An empurrador annexes to a brake pedal an axle, you zakontrit an axle of pedal the quiff.
Install the cylinder of main brake, annex oil pipelines of brake to him.
Annex a hose of vacuum to the amplifier.
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PREVENTION
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Fill out the fluid of brake in a tank of a hydraulic acionador of brakes and withdraw the air of a hydraulic acionador.
One convinces of the lack of the drop of fluid of brake.
Check and if necessary agreement a pedal of brake (height of pedal of brake is left a floor).
After the installation put enough lubricant at places of the contact between an axle and a pedal (fig. 6.11).
Cylinder of main brake
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Fig. 6.12. Cylinder of main brake: 1 – cork of a tank of a hydraulic acionador of brakes; – I filter 2; 3 – tank of a hydraulic acionador of brakes; 4 – sealing placing; 5 – piston of an advanced cavity of the cylinder of main brake; 6 – piston of a rear cavity of the cylinder of main brake; 7 – cylinder of main brake; 8 – screw of fixation of a tank of a hydraulic acionador of brakes; 9 – a cylindrical pin (in the equipped system cars antiblokiro-vochny of brakes)
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Removal
Withdraw the filter of air.
Separate the capture of contact of the sensor of the level of fluid of brake.
Desconecte oil pipelines of brake of the cylinder of main brake and shut openings technological hats.
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PREVENTION
In the moment of the removal of the main brake they do not transport the cylinder too much far or the damages of the oil pipelines of brake.
Do not allow the blow of fluid of brake in surrounding details as it can damage a painting and the covering of varnish of a body. In the moment of the blow of liquid in a painting and the covering of varnish of a body immediately it is taken away by them while washing water.
Since the prevention of a spilling of liquid rolls up connections of rags of oil pipelines or napkins.
Withdraw the cylinder of main brake, having put out nuts of hair clips of hair of his fixation.
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Desmontagem
Withdraw a cork of a tank of a hydraulic acionador of brakes and it establishes the fluid of brake in the prepared capacity.
Unscrew the screw of the fixation of a tank and separate a tank of the cylinder of main brake (fig. 6.13).
Take away the piston of an advanced cavity of the cylinder. The screwdriver shift the piston of a rear cavity and it takes away a cylindrical pin. Take away the piston of a rear cavity.
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TO OBSERVE
Do not take to pieces pistons of the advanced one and rear cavities of the cylinder.
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Check of technical condition
Check cavities of cylinder to existence of aspects of the corrosion, zadir or рисок in surfaces.
Check the cylinder of main brake to existence of use or damages. If necessary clear or they substitute the cylinder.
Wash out the polluted alcohol of details.
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TO OBSERVE
In the presence of damages of a mirror of the cylinder they substitute the cylinder of joined main brake.
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Meeting
Apply the fluid of brake of the necessary mark in details of rubber of pistons and sealing placing.
Carefully insertion in the cylinder of one spring and pistons, having supplied his correct situation (fig. 6.15).
The screwdriver drowns pistons in the cylinder and establishes a ring of lock in a cylinder in favor point.
Drown pistons in the cylinder against the stop to screwdriver and insert a cylindrical pin (fig. 6.16) (only in the equipped cars of antiblockade of system of brakes).
Installation
Install the cylinder of main brake in the amplifier of vacuum of brakes.
Annex oil pipelines of brake to the cylinder.
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PREVENTION
Fill out the fluid of brake in a tank and withdraw the air of a hydraulic acionador of brakes.
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Establish amba the placing of fighter of a tank.
Install a tank of a hydraulic acionador of brakes in the cylinder.
Pressure regulator
The regulator of the pressure serves for the distribution of the pressure of fluid of brake in mechanisms of brake of the advanced one and rear wheels for aims of the increase in the efficiency of frenagem and prevention of the premature blockade of wheels. The desmontagem of the regulator of the pressure is not allowed like his work capacity straightly it depends on the correct tension of his spring during the installation.
The pressure regulators (in one for each mechanism of brake of rear wheels) are installed in the cylinder of main brake.
Check of technical condition
The control of the technical condition of the regulator of the pressure has to happen in the conditions of the station of service of the cars of Hyundai.
Since the check of the technical condition of the regulator of manometers of control of pressure is in use.
Brake oil pipelines
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Fig. 6.17. The oil pipelines of the outline of a hydraulic acionador of brakes of advanced wheels of cars without antiblockading the system of brakes: 1 – hose of brake of the left advanced wheel; 2 – hose of brake of the right dispatch the wheel
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Fig. 6.18. The oil pipelines of an outline of a hydraulic acionador of brakes of advanced wheels of the cars equate of the antiblockade of the system of brakes: 1 – hydraulic block of antiblockading the system of brakes; 2 – arm of the fixation of the hydraulic block of antiblockading the system of brakes; 3 – hose of brake of the left advanced wheel; 4 – hose of brake of the right dispatch the wheel
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The oil pipelines of an outline of a hydraulic acionador of brakes of advanced wheels of cars without antiblockading the system of brakes are shown in the fig. 6.17. The oil pipelines of an outline of a hydraulic acionador of brakes of advanced wheels of the equipped cars of the antiblockade of the system of brakes show up in the fig. 6.18.
Check of oil pipelines and his connections without removal of the car
Since the prevention of the sudden failure of the system of brakes carefully checks a condition of all the oil pipelines and connections, paying the special attention to a next one:
– the metal oil pipelines must not have забоин, scratches, zadir, the active centers of the corrosion and have to be located distant of sharp edges that can damage them;
– the brake hose will be elastic, not to have pains and slits. The hose has to be closed strongly in hints. The woodcarving of hints of a hose must no have damages. If holding tight a pedal of brake when hose being inflated, so the ropes threads split. In the moment of the detection of some of these defects the hose has to be substituted. In hoses the mineral oils and the lubricants that dissolve rubber must not come;
– all the supports of the triangular form of the fixation of oil pipelines will be whole and will concentrate well. The weakening of fixation or destruction of supports of triangular form leads to the vibration of oil pipelines that causes his breaks;
– the hole of fluid of brake of connections of the main cylinder with oil pipelines and a tank is not allowed.
In the moment of the detection of bad functioning they substitute the new damaged details. Substitute flexible hoses (independent of his state) new after 120 thousand km of a race or after 5 years of the Repair of the car to warn sudden slits because of the rubber aging.
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PREVENTION
Do not allow to fall of the brake fluid in surrounding details as it can damage a painting and the covering of varnish of a body. In the moment of the blow of liquid in a painting and the covering of varnish of a body immediately it is taken away by them while washing water.
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TO OBSERVE
Before the connection of oil pipelines and hoses of a hydraulic acionador of the system of brakes to be convinced of the absence in all the details of the powder and other foreign particles.
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Removal
Substitute hoses of brake in spite of twisting aspects, slits and aspects of the drop of fluid of brake.
Since a lack of interest of hoses of brake of oil pipelines of brake uses a special key for unions.
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Fig. 6.19. Removal of a clip of fixation of a hose of brake: 1 – brake oil pipeline; 2 – clip; 3 – curb the hose
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Through the pliers of flat nose or the hammer they withdraw a clip of the fixation of a hose (fig. 6.19).
Withdraw a hose of brake.
Check of technical condition
Check oil pipelines of brake to existence of slits, pleats and aspects of the corrosion.
Check hoses of brake to existence of slits, damages and aspects of the hole of fluid of brake.
Check nuts of unions of oil pipelines of existence of damages and aspects of the hole of fluid of brake.
Installation
Establish a hose of brake, without allowing what one supports.
Install oil pipelines of brake so that they did not concern sharp edges of near details, welded sewings and movable parts.
Combine a tip of a hose of brake with an arm groove.
Establish a clip of the fixation of a hose.
Hold tight a nut of the union of fixation of a hose of brake.
Hold tight nuts of unions the moment of 13-17 N · m, an union of fixation of the brake waters with hose to supports of mechanisms of brake of advanced wheels the moment of 25-30 N · m.
After the accession of hoses of brake they withdraw the air of a hydraulic acionador of brakes.
Brake pedal
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Fig. 6.20. Brake pedal: 1 – nuts with a fillet; 2 – curbing nuts of switch of sign; 3 – curbing switch of sign; 4 – nut; 5 – lavador of spring; 6 – right capture of a pedal of a brake; 7 – a brake pedal (cars without antiblockading the system); 8 – emphasis of pedal of brake; 9 – a pedal of brake (the equipped cars of antiblockade of system); 10 – when was left taken of a pedal of a brake; 11 – pin of fixation of a pedal of a brake; 12 – repayable spring of a pedal
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Removal
Withdraw the switch of sign that brakes.
Withdraw the quiff and an axle of an empurrador of a pedal.
Put out nuts of the fixation of the knot of a pedal of a brake.
Withdraw the knot of pedal of joined brake.
Check of technical condition
Check the next thing:
– the pedal covers in the use existence;
– a brake pedal in deformations existence;
– a repayable spring of a pedal in damages existence;
– switch of sign that brakes.
Annex an ohmmeter to conclusions of the switch of a sign of the frenagem and to be convinced of the lack of the interval of an electric chain of the fig. 6.21).
If the chain will be interrupted in the compressed empurrador of the switch and if it restores in not empurrador held tight, the switch of a sign of the frenagem is useful (to see the fig. 6.21).
Installation
It executes the installation of a pedal of a brake as debit to be, the return to the removal.
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TO OBSERVE
Fix an axle of empurrador for the quiff. 2 NGLI apply the lubricant n ° in an axle.
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Establish the knot of pedal of brake, hold tight nuts with a fillet (a nut of the fixation of the amplifier of vacuum of brakes) and a pin of the fixation of a pedal.
Install the switch of sign that brakes.
Adjust the height of pedal of brake on a floor and release to go round of a pedal.
Mechanism of brake of an advanced wheel
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Fig. 6.22. Mechanism of brake of an advanced wheel: 1 – pin of fixation of a hose of brake; 2 – curb the hose; 3 – a support of the mechanism of brake of a guide of shoes of brake was joined; 4 – brake disc; 5 – nut of nave of wheel; 6 – the screw of fixation of a disc of brake to a nave; 7 – screw of fixation of the covering of protection
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The mechanism of brake of an advanced disc of wheel, with automatic agreement of a slit between blocks and a disc, with a support of triangular form that floats and a device sinalizador of use of shoes of brake. The support of triangular form is formed by a support and the cylinder of wheel that are joined with pins. The support of fixed movable triangular form pins to fingers that are established in openings of a guide of shoes of brake. To guide grooves they curb the shoes are drawn in per springs. The internal block is supplied with a device sinalizador of the mistakes use.
In a cavity of the cylinder of brake the piston with a fighter ring is installed. Due to the elasticity of this ring the best slit between blocks and a disc is supported.
Removal and installation of shoes of brake
Removal
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Fig. 6.23. The provision of a support of the mechanism of brake in the moment of removal of shoes of brake
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Put out a pin of the fixation of the finger of support of inferior direction, raise a support and lift to a hoof of the car in a wire or in a different way (fig. 6.23).
Withdraw shoes of brake.
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PREVENTION
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Check of technical condition
Check the use of shoes of brake and if necessary it substitutes them.
Substitute blocks in the next cases:
– thickness of mistakes of friction of less admissible;
– the mistakes surface is oily;
– the friction mistake is joined not firmemente to the block base;
– the mistakes have deep furrows and chips.
Check blocks to damages existence or the deformation.
The nominal thickness of bedcovers of friction of shoes of brake does
9 mm, permissible maximum in use – 1 mm.
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PREVENTIONS
Substitute blocks in mechanisms of brake of both wheels advanced at the same time. The substitution of internal and extern blocks between them, and also between the left and right wheels it is inadmissible. It can lead to the unequal frenagem.
When it substitutes shoes of brake it checks blocks to deformation existence. Substitute the springs of property of the new fingers of direction or establish springs you were re-using, when pollution compensated for them.
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Installation
Establish the springs of property of blocks.
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TO OBSERVE
Establish blocks so that indicative of use one climbed a block of the piston.
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After the blocks installation before moving a support in the position, there drowns the piston in the cylinder through the adaptation 09581-11000 (fig. 6.26).
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Fig. 6.27. Brake shoes with placing: 1 – agreement of play of a shoe of internal brake; 2 – agreement of play of a shoe of extern brake; 3 – placing of a shoe of extern brake; 4 – shoe of extern brake; 5 – a shoe of internal brake with the use sensor; 6 – placing of a shoe of internal brake; 7 – covering of placing of a shoe of internal brake
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PREVENTION
Do not allow the blow of the lubricant in brake discs and blocks.
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The coat a pin of the fixation of the finger of direction of a support and it holds tight his key of dynamometer (fig. 6.28).
Removal and installation of the mechanism of brake
Removal
Withdraw a wheel.
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Fig. 6.29. To join details of a head of a hose of brake: 1 – they curb the hose; 2 – brake mechanism; 3 – sealing placing; 4 – a pin of fixation of a head of a hose to the brake mechanism
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PREVENTIONS
Do not allow the blow of fluid of brake in a detail of the car. It can damage a painting and the covering of varnish of a body. In the moment of the blow of liquid in a painting and the covering of varnish of a body immediately it is taken away by them while washing water.
Since the prevention of the passage of fluid of brake rolls up connections of rags of hoses or napkins.
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Put out a pin of the fixation of the cylinder.
Put out pins of the fixation of a guide of blocks to a rotary fist.
Withdraw a guide of blocks.
Check of technical condition
Check the next thing:
– a support in existence of use, damages, slits;
– the piston in availability of powder, damages, slits and use of an extern surface;
– the capture and the finger of direction in existence of damages and powder;
– springs and protective blocks hats in damages existence;
– a blocks guide in existence of damages, powder, use and slits.
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PREVENTION
Do not apply a paper of emery to the cleaning of a surface of the piston of the cylinder of brake.
Substitute all the new details of rubber.
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The nominal thickness of a disc of brake (it happens through a calibre beat) will be 19 mm, admissible minimum in the use – 17 mm.
The difference in the thickness in the moment of the measurement at places different from a disc must not exceed 0,01 mm.
The axial thrashing of a surface of work of a disc (it happens through indicative of arrow of the type of hour) must not exceed 0,04 mm (to see the fig. 6.31).
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TO OBSERVE
Through a micrometer 45 check the thickness of a disc of brake in eight points located in the distance approximately 10 mm of an edge of disc with a step °.
Define a difference in the thickness of disc like a difference between the biggest and less thickness.
Since the measurement of an axial thrashing of a surface of work of a disc fixes indicative of arrow of the type of hour in the distance approximately 5 mm of an edge of a disc and becomes a disc in 360 °.
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Define an axial thrashing of a surface of work of a disc like a difference between the values biggest and less of a thrashing.
Installation of the mechanism of brake
It executes the installation of the mechanism of brake as debit to be, the return to the removal, considering the next thing.
Do not allow the blow of lubricant or oil in surfaces of work of shoes of brake and a disc.
Hold tight pins of the fixation of the mechanism of brake the specified moment.
Annex a hose of brake to the hydraulic cylinder of the mechanism of brake, having established the new placing of fighter.
Withdraw the air of a hydraulic acionador of brakes.
To be demolished and meeting of the mechanism of brake
Desmontagem
Withdraw a covering on trial of powder of the piston.
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Fig. 6.32. The removal of the piston of the cylinder through a fountain of compressed air (for the prevention of the damage of the piston in an exit of the cylinder in edges of a support the wooden placing is established)
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PREVENTIONS
In the moment to push out of the piston the compressed air they protect fingers of the punch.
Do not allow to sprinkle of the brake fluid.
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The screwdriver takes a ring of fighter of the piston of the cylinder, trying not to damage the surface of the cylinder.
Meeting
Except shoes of brake and his placing, wash out all the details isopropyl alcohol.
Install a ring of fighter of the piston in the cylinder, previously show up in a lubricating ring finger of details of rubber.
Apply the lubricant of details of rubber in an in favor point of support, in the extern surface of the piston and in a covering of piston.
Bring a covering of piston otbortovka to an internal flute of a support and move the piston in a support (to see the fig. 6.33).
Apply the lubricant of details of rubber of the extern surface of the capture and the finger of direction, in an opening of the capture and a finger in a support, in a protective hat of a finger and a hat of the capture.
Establish shoes of brake.
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TO OBSERVE
Do not allow the blow of the lubricant in surfaces of work of a disc of brake and blocks.
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Mechanism of brake of a rear wheel
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Fig. 6.35. Mechanism of brake of a rear wheel: 1 – the mechanism of automatic agreement of a slit between a drum and blocks; 2 – spring of superior union of blocks; 3 – the lever of the mechanism of automatic agreement of a slit between a drum and blocks; 4 – a spring of the mechanism of automatic agreement of a slit between a drum and blocks; 5 – lavador; 6 – lower the spring of union of blocks; 7 – the spring of direction; 8 – brake shoe; 9 – a direction spring torture
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The mechanism of brake of a rear drum of wheel, with automatic agreement of a slit between blocks and a drum. The device of the automatic agreement of a slit is located separately of the cylinder of brake of wheel and straightly one does not adhere with a hydraulic brakes acionador.
Removal and installation of the mechanism of brake
Removal
Launch the brake of parking.
Withdraw a wheel and the drum of brake.
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TO OBSERVE
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Fig. 6.37. Elements of the mechanism of brake of a rear wheel: 1 – wheel cylinder; 2 – the lever of the mechanism of automatic agreement of a slit between a drum and blocks; 3 – a spring of the mechanism of automatic agreement of a slit between a drum and blocks; 4 – brake shoe; 5 – lower the spring of union of blocks; 6 – a lavador, the spring of direction and a torture of one spring; 7 – the mechanism of automatic agreement of a slit between a drum and blocks; 8 – spring of superior union of blocks
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Withdraw one spring and the lever of the mechanism of the automatic agreement of a slit between a drum and blocks (fig. 6.37).
Withdraw the lavadores of spring tortures of direction directing springs of blocks and a spring torture of direction (to see the fig. 6.37).
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Fig. 6.38. Removal of a shoe of brake: 1 – brake shoe; 2 – lever of the walk of the brake of parking; 3 – thread of the walk of the brake of parking
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Withdraw the springs of union more low and blocks superiors, desconecte a thread of the lever of the walk of the brake of parking (fig. 6.38).
Check of technical condition
Through the indicator they check a radial thrashing of the drum of brake.
Nominal internal diameter of the drum of brake, mm:
cars without antiblockading the system of brakes..... 180
the cars are equipped of the antiblockade of the system of brakes..... 203,2
The very permissible diameter of the drum of brake, mm:
system cars bezantiblokirovochny of brakes..... 182
the cars are equipped of the antiblockade of the system of brakes..... 205,2
The very permissible radial thrashing of the drum of 0,05 mm brake.
Check the thickness of bedcovers of friction of shoes of brake.
The nominal thickness of bedcovers of friction of shoes of brake will be 5,14 mm, the very permissible thickness – 1 mm.
Check the extern surface of the cylinder of brake of wheel of the existence of use or damages.
Check a plank of the mechanism of brake of the existence of use or damages.
Installation
Wall light SAE J310 universal, lubricating n ° 2 of NGLI the places of the contact of blocks of brake and a council of the mechanism of brake, and also to places of the contact of shoes of brake and the lowest support (fig. 6.41).
Annex a thread to the lever of the walk of the brake of parking.
Establish shoes of brake and the springs of direction.
Install the mechanism of the automatic agreement of a slit between a drum and blocks and the springs of union of the blocks.
Install the lever and a spring of the mechanism of the automatic agreement of a slit between a drum and blocks.
Install the drum of brake and several times completely hold tight the lever of the system of brakes of parking.
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PREVENTION
Lubricating and another pollution does not allow the blow of in the surface of work of the drum of brake.
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TO OBSERVE
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The exterior diameter of shoes of brake of cars without antiblockading the system (the diameter of a drum of 7 inches) will be 179,5-179,0 mm; the equipped cars of antiblockade of system of brakes (diameter of a drum of 8 inches) – 202,2-201,7 mm.
Adjust a slit between blocks and a drum, when 10 held tight a pedal of brake with the effort kgfs more than 20 times.
To be demolished and meeting of the cylinder of brake
Withdraw shoes of brake.
Desconecte the oil pipeline of brake of the cylinder.
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Fig. 6.43. The pins of the fixation of the cylinder of brake of wheel (they examine from a reverse side of a council of the mechanism of brake)
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Fig. 6.44. Brake cylinder: 1 – case of the cylinder of brake; 2 – spring; 3 – union of extraction through bomb of a hydraulic acionador of the system of brakes; 4 – sealing ring; 5 – piston; 6 – protective hat of the piston
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Before meeting of the check of cylinder of wheel:
– the cylinder and pistons in existence of use, damages and powder;
– the case of cylinder in existence of damages and slits;
– the basic surfaces of pistons and blocks in use existence;
– a spring of piston in reduction in inflexibility.
It executes the meeting as debit to be, the return to the desmontagem.
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TO OBSERVE
Before the meeting they wash out a cavity of the cylinder and internal details isopropyl alcohol.
Quite fluid brake wall light in the hunting of fists of sleeve of pistons and a wall of the cylinder.
Always substitute fists of sleeve of fighter and new protective hats.
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PREVENTION
The trace that the ball did not leave the union extraction through bomb.
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