6.2. Check and adjust of elements of the system of brakes
Agreement of height of a pedal of a brake is left a floor
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Fig. 6.1. Measurement of height of a pedal is left a floor: 1 – curbing switch of sign; 2 – nut of fixation of the switch of a sign of frenagem; 3 – height of pedal of brake; 4 – lock the nut of an empurrador of a pedal of a brake; 5 – empurrador of brake pedal
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Withdraw a carpet of a floor and measure the height of pedal on a floor (fig. 6.1). If the height of a pedal does not find the standard, carry out the agreement, as shown down.
Pedal height on a 182,1 (+5,0) mm floor.
Separate the capture of contact of the switch of a sign of the frenagem, put out a nut of lock of the switch of a sign of frenagem and coat links so that it did not concern the lever of pedal of brake.
Put out a nut of lock of an empurrador and adjust the height of pedal of brake on a floor in the limits specified for what reduces or increases the length of empurrador, making spinning his passatizham (fig. 6.2).
Establish for the rotation of the switch of a sign of curbing a slit between his empurrador and an emphasis of a pedal inside 0,5-1,0 mm. Confiantemente holds tight a nut of lock of the switch the moment of 8-10 N · m.
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TO OBSERVE
The course of a pedal of a brake will do not less than 130 mm.
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In a detour of course of pedal of the standard they repeat the agreement of the height of a pedal and slit between the switch of a sign of the frenagem and an emphasis of a pedal.
Join the capture of contact of the switch of a sign of the frenagem.
It is secured what in a brake pedal otpuskaniye the sign of the frenagem extinguishes slowly.
In the idle depression of heap of motor in the vacuum amplifier, when two three have pressed times a pedal of brake and the pressure of the hand they check that it releases to go round of a pedal of a brake.
Release to go round of a pedal of a brake it will do 3-8 mm.
It if is released to go round of a pedal if it specifies less than lower limit, they are convinced from the complaisance to the standard of a slit between an empurrador of the switch of a sign of the frenagem and an emphasis of a pedal of a brake.
It if is released to go round of a pedal more than the specified superior limit, also it is a too big slit between an axle and the lever of a pedal of a brake. Check the technical condition of these details and if necessary it substitutes them.
Check of technical condition and operabilidade of elements of the system of brakes
Check of a hydraulic acionador of brakes
In the work motor they hold tight a pedal of brake with the effort approximately 120 kgfs. Check the cylinder of main brake, a hydraulic acionador of brakes and each connection of the existence of holes.
Check of Repair of the amplifier of vacuum of brakes without devices use
For the simple check there is necessary the next thing executes works of the amplifier of vacuum.
Launch the motor, leave us that it works 1-2 minutes and stopped. Several times hold tight a pedal of brake with the normal effort. If the pedal lessens in the first one
pressing, but gradually it increases during the second or third pressing, the brakes amplifier is useful. If the height of a pedal is not modified, the amplifier is defective.
In the idle motor several times hold tight a pedal of a brake and check the modification of the height of a pedal. After that press a pedal and launch the motor. If at the same time the pedal is a little down, the amplifier is useful. If the height of a pedal remains ancient, the amplifier is defective.
In the work motor they hold tight a pedal of a brake and stop the motor. Maintain a pedal of a brake held tight during 30 pages. If during this time the height of a pedal is not modified, the amplifier is useful. If it increases the pedal, the amplifier is defective.
If in one of the specified ways of the check the bad functioning was defined, check a hose of vacuum and the amplifier, remove bad functioning. If the results of all the positive checks, the amplifier is useful.
Check of Repair of the valve backpressure of the amplifier of vacuum of brakes
It executes an inspection in the valve backpressure installed in a vacuum hose.
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Fig. 6.3. Amplifier of vacuum of brakes: 1 – they inhale the amplifier of brakes; 2 – pressure regulator (in cars without ABS); 3 – brake oil pipelines; 4 – inhale the hose
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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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Removal of air of a hydraulic acionador of brakes (extraction through bomb)
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PREVENTION
In the moment of the blow of fluid of brake in a painting and the covering of varnish of a body immediately it is taken away by them while washing.
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TO OBSERVE
During the removal of air of a hydraulic acionador below the pressure they do not hold tight a pedal of brake.
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Annex a hose of vinyl to the union to pump in the wheel cylinder, lower another end of a hose in the container with the fluid of brake (fig. 6.5).
Several times hold tight a pedal of brake.
In the pedal held tight to the maximum they weaken an inhalation of union to pump until a fluid does not begin to follow a hose brake, soon hold tight the union.
Repeat the enumerated above actions even in the liquid after the brake cylinder there are no air bottles.
Hold tight the union of bomb.
Moment of an inhalation of unions of extraction through bomb of 7-13 N · m.
Carry out the Repairs specified in other cylinders of wheel in the next order: a rear right wheel (in the direction of the movement of the car), an advanced left wheel, a few back left the wheel, advanced right wheel.
Agreement of the lever of the walk of the system of brakes of parking
After pumping of a hydraulic acionador of brakes of 20 times they hold tight a pedal of brake with the effort more than 10 kgfs.
More than three times to the utmost hold tight the lever of the walk of the brake of parking.
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Fig. 6.6. Lever of the brake of parking: 1 – lever of the brake of parking; 2 – nut agreement; 3 – thread of the walk of the brake of parking; 4 – igualador; 5 – covering
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In the moment of the rise the lever has to move for 6-8 teeth of the sector (the point of the application of the effort has to be installed in the distance of 25 mm of a face of end of lever). When it moves from the number biggest or less of teeth of the sector it adjusts the course of the lever (fig. 6.6).
The lamp of control of the connection of the brake of parking is extinguished slowly in the moment of the extinguishment full of a brake and illuminates lifting the lever in a tooth of the sector. If the switch will not work how if it specifies, it substitutes it.
In the ending of the agreement to be convinced of the lack of despising of rear wheels in the completely lowered lever of the walk of the brake of parking.