Hyundai Getz>> Brake system>> Working brake system
Vacuum amplifier of brakes

Fig. 6.7. Vacuum amplifier of brakes: 1–vacuum hose; 2–return valve; 3–collar; 4–pusher axis; 5–washer; 6–шплинт; 7–knot of a pedal of a brake; 8–vacuum amplifier of brakes; 9–main brake cylinder


The vacuum amplifier of brakes is shown on fig. 6.7 .
At failure of the vacuum amplifier the effort to a brake pedal considerably increases that negatively affects driving. Repair of the vacuum amplifier needs the special tool therefore it is recommended to replace it assembled.

PREVENTIONS
At removal of the main brake cylinder do not allow excesses and damage of brake pipelines.
Do not allow hit of brake liquid on a car detail. It can damage a paint and varnish covering of a body. At liquid hit on a paint and varnish covering of a body immediately wash away it water.
For prevention of the passage of brake liquid wrap up connections of hoses by rags or napkins.

Removal
Remove the air filter.

Fig. 6.8. Contact socket of the sensor of level of brake liquid


Separate the contact socket of the sensor of level of brake liquid (fig. 6.8) .
Remove a stopper of a tank of a hydraulic actuator of brakes and with a syringe or other adaptation remove liquid from a tank.
Disconnect brake pipelines from the main brake cylinder.

PREVENTION
Take measures against hit of brake liquid on surrounding details.

Fig. 6.9. Elements of a hydraulic actuator of working brake system: 1–vacuum amplifier of brakes; 2–vacuum hose; 3–a pressure regulator (on cars without anti-blocking system of brakes); 4–brake pipelines


Remove the main brake  cylinder from the vacuum amplifier, having unscrewed nuts of his fastening (fig. 6.9) .
Disconnect a vacuum hose from the amplifier of brakes (see fig. 6.9 ).
Disconnect a pusher from a brake pedal.
Unscrew nuts of hairpins of fastening of the vacuum amplifier of brakes.
Check of operation of the return valve of the amplifier of brakes
Check carry out on the return valve established in a vacuum hose.
Remove a vacuum hose of the amplifier of brakes.

       NOTE
The return valve is established with a tightness in a vacuum hose on adjusting labels.

Check operation of the return valve by means of the vacuum pump.

PREVENTION
In case of malfunction of the return valve replace it assembled with a vacuum hose.

Installation
Establish the vacuum amplifier of brakes and tighten nuts of fastening the specified moment.
Moment of an inhaling of nuts of hairpins of fastening of the vacuum amplifier of brakes of 8-12 N · m.
Put greasing in a contact place between a pedal of a brake and a pusher.
Attach a pusher to a brake pedal an axis, законтрите a pedal axis the shplinty.
Establish the main brake cylinder, attach to it brake pipelines.
Attach to the amplifier a vacuum hose.

PREVENTION
Fig. 6.10. Accession of a vacuum hose to a branch pipe of the vacuum amplifier of brakes: 1–vacuum hose; 2–branch pipe

Do not allow an excess, twisting and violation of tightness of a vacuum hose. At connection of a vacuum hose to a branch pipe of the amplifier put on a hose 25–27 mm, as is shown in fig. 6.10 .

Fill in brake liquid in a tank of a hydraulic actuator of brakes and remove air from a hydraulic actuator.
Be convinced of lack of a podtekaniye of brake liquid.
Check and if necessary adjust a brake pedal (height of a pedal of a brake over a floor).

Fig. 6.11. Places of drawing of greasing


After installation put greasing enough in contact places between an axis and a pedal (fig. 6.11) .

Main brake cylinder

Fig. 6.12. Main brake cylinder: 1–stopper of a tank of a hydraulic actuator of brakes; 2–filter; 3–tank of a hydraulic actuator of brakes; 4–sealing laying; 5–piston of a forward cavity of the main brake cylinder; 6–piston of a back cavity of the main brake cylinder; 7–main brake cylinder; 8–screw of fastening of a tank of a hydraulic actuator of brakes; 9–a cylindrical pin (on the cars equipped with antiblokiro-vochny system of brakes)


The main brake cylinder is shown on fig. 6.12 .
Removal
Remove the air filter.
Separate the contact socket of the sensor  of level of brake liquid.
Disconnect brake pipelines from the main brake cylinder and close openings technological caps.

PREVENTION
At removal of the main brake cylinder do not allow an excess or damage of brake pipelines.
Do not allow hit of brake liquid on surrounding details as it can damage a paint and varnish covering of a body. At liquid hit on a paint and varnish covering of a body immediately wash away it water.
For prevention of spill of liquid wrap up connections of pipelines by rags or napkins.
Remove the main brake cylinder, having unscrewed nuts of hairpins of its fastening.

Dismantling
Remove a stopper of a tank of a hydraulic actuator of brakes and merge brake liquid in the prepared capacity.

Fig. 6.13. Otvorachivaniye of the screw of fastening of a tank to the main brake cylinder


Unscrew the screw of fastening of a tank and separate a tank from the main brake cylinder (fig. 6.13) .

Fig. 6.14. Removal of a lock ring


Nippers remove a lock ring (fig. 6.14) .
Take out the piston of a forward cavity of the cylinder. A screw-driver shift the piston of a back cavity and take out a cylindrical pin. Take out the piston of a back cavity.

       NOTE
Pistons of forward and back cavities of the cylinder do not assort.

Check of a technical condition
Check cylinder cavities on existence of traces of corrosion, задиров or рисок on surfaces.
Check the main brake cylinder on existence of wear or damages. If necessary clear or replace the cylinder.
Wash out the polluted details alcohol.

       NOTE
In the presence of damages of a mirror of the cylinder replace the main brake cylinder assembled.

Assembly
Put brake liquid of demanded brand on rubber details of pistons and sealing laying.

Fig. 6.15. An order of installation of pistons in the main brake cylinder


Carefully insert into the cylinder of a spring and pistons, having provided their correct situation (fig. 6.15) .
Screw-driver drown pistons in the cylinder and establish in a cylinder pro-point a lock ring.

Fig. 6.16. Installation of a cylindrical pin in the brake cylinder: 1–cylindrical pin


Drown pistons in the cylinder against the stop a screw-driver and insert a cylindrical pin (fig. 6.16)  (only on the cars equipped with anti-blocking system of brakes).
Installation
Establish the main brake cylinder on the vacuum amplifier of brakes.
Attach to the cylinder brake pipelines.

PREVENTION
Fill in brake liquid in a tank and remove air from a hydraulic actuator of brakes.

Establish both sealing laying of a tank.
Establish on the cylinder a tank of a hydraulic actuator of brakes.

Pressure regulator
The regulator of pressure serves for distribution of pressure of brake liquid in brake mechanisms of lobbies and back wheels for the purpose of increase of efficiency of braking and prevention of premature blocking of wheels. Dismantling of a regulator of pressure is not allowed, as its working capacity directly depends on the correct tension of its spring at installation.
Pressure regulators (on one for each brake mechanism of back wheels) are established on the main brake cylinder.
Check of a technical condition
Check of a technical condition of a regulator of pressure should be made in the conditions of service station of Hyundai cars.
For check of a technical condition of a regulator of pressure control manometers are used.

Brake pipelines

Fig. 6.17. Pipelines of a contour of a hydraulic actuator of brakes of forward wheels of cars without anti-blocking system of brakes: 1–brake hose of the left forward wheel; 2–brake hose of the right forward wheel


Fig. 6.18. Pipelines of a contour of a hydraulic actuator of brakes of forward wheels of the cars equipped with anti-blocking system of brakes: 1–hydraulic block of anti-blocking system of brakes; 2–arm of fastening of the hydraulic block of anti-blocking system of brakes; 3–brake hose of the left forward wheel; 4–brake hose of the right forward wheel


Pipelines of a contour of a hydraulic actuator of brakes of forward wheels of cars without anti-blocking system of brakes are shown on fig. 6.17 . Pipelines of a contour of a hydraulic actuator of brakes of forward wheels of the cars equipped with anti-blocking system of brakes, are presented on fig. 6.18 .

Check of pipelines and their connections without removal from the car
For the prevention of sudden refusal of brake system carefully check a condition of all pipelines and connections, paying special attention to the following:
– metal pipelines should not have забоин, scratches, задиров, the active centers of corrosion and should be located far from sharp edges which can damage them;
– the brake hose should be elastic, not have anguishes and cracks. The hose should be closed strongly up in tips. The carving of tips of a hose should not have damages. If by pressing a brake pedal the hose is inflated, means, threads of cords are torn. At detection of any of these defects it is necessary to replace a hose. On hoses mineral oils and the greasings dissolving rubber should not get;
– all brackets of fastening of pipelines should be whole and are well fixed. Weakening of fastening or destruction of brackets leads to vibration of pipelines which causes their breakages;
– leakage of brake liquid from connections of the main cylinder with pipelines and a tank is not allowed.
At detection of malfunctions replace the damaged details new. Flexible hoses (irrespective of their condition) replace new after 120 thousand km of run or after 5 years of operation of the car to warn sudden gaps because of rubber aging.

PREVENTION
Do not allow a prolivaniye of brake liquid on surrounding details as it can damage a paint and varnish covering of a body. At liquid hit on a paint and varnish covering of a body immediately wash away it water.

       NOTE
Before connection of pipelines and hoses of a hydraulic actuator of brake system be convinced of absence on all details of a dust and other extraneous particles.

Removal
Replace brake hoses with twisting traces, cracks and traces of a podtekaniye of brake liquid.
For a detachment of brake hoses from brake pipelines use a special key for unions.

Fig. 6.19. Removal of a clip of fastening of a brake hose: 1–brake pipeline; 2–clip; 3–brake hose


By means of flat-nose pliers or a hammer remove a clip of fastening of a hose (fig. 6.19) .
Remove a brake hose.
Check of a technical condition
Check brake pipelines on  existence of cracks, folds and corrosion traces.
Check brake hoses on existence of cracks, damages and traces of leakage of brake liquid.
Check nuts of unions of pipelines on existence of damages and traces of leakage of brake liquid.
Installation
Establish a brake hose, without allowing its twisting.
Brake pipelines establish so that they did not concern sharp edges of nearby details, welded seams and mobile parts.
Combine a tip of a brake hose with an arm groove.
Establish a clip of fastening of a hose.
Tighten a nut of the union of fastening of a brake hose.
Tighten nuts of unions the moment of 13-17 N · m, the union of fastening of brake hoses to supports of brake mechanisms of forward wheels the moment of 25-30 N · m.
After accession of brake hoses remove air from a hydraulic actuator of brakes.

Brake pedal

Fig. 6.20. Brake pedal: 1–nuts with a fillet; 2–nuts of the switch of a signal of braking; 3–switch of a signal of braking; 4–nut; 5–spring washer; 6–right plug of a pedal of a brake; 7–a brake pedal (cars without anti-blocking system); 8–emphasis of a pedal of a brake; 9–a brake pedal (the cars equipped with anti-blocking system); 10-left plug of a pedal of a brake; 11-bolt of fastening of a pedal of a brake; 12-returnable spring of a pedal


The pedal of a brake is shown on fig. 6.20 .
Removal
Remove the switch of a signal of braking.
Remove шплинт and an axis of a pusher of a pedal.
Unscrew nuts of fastening of knot of a pedal of a brake.
Remove knot of a pedal of a brake assembled.
Check of a technical condition
Check the following:
– pedal plugs on wear existence;
– a brake pedal on existence of deformations;
– a returnable spring of a pedal on existence of damages;
– switch of a signal of braking.

Fig. 6.21. Check of the switch of a signal of braking


Attach an ohmmeter to conclusions of the switch of a signal of braking and be convinced of absence of break of an electric chain fig. 6.21 ).
If the chain is broken off at the pressed pusher of the switch and restored at not pressed pusher, the switch of a signal of braking is serviceable (see fig. 6.21 ).
Installation
Installation of a pedal of a brake carry out as it should be, the return to removal.

       NOTE
Fix a pusher axis the shplinty. Put on an axis NGLI No.2 greasing.

Establish knot of a pedal of a brake, tighten nuts with a fillet (a nut of fastening of the vacuum amplifier of brakes) and a bolt of fastening of a pedal.
Establish the switch of a signal of braking.
Adjust height of a pedal of a brake over a floor and a free wheeling of a pedal.

Brake mechanism of a forward wheel 

Fig. 6.22. Brake mechanism of a forward wheel: 1–bolt of fastening of a brake hose; 2–brake hose; 3–a support of the brake mechanism with directing brake shoes assembled; 4–brake disk; 5–nut of a nave of a wheel; 6–the screw of fastening of a brake disk to a nave; 7–screw of fastening of a protective casing


The brake mechanism of a forward wheel is shown on fig. 6.22 .
The brake mechanism of a forward wheel disk, with automatic adjustment of a gap between blocks and a disk, with a floating bracket and a signaling device of wear of brake shoes. The bracket is formed by support and the wheel cylinder which are pulled together with bolts. The mobile bracket fastens bolts to fingers which are established in openings directing brake shoes. To grooves directing brake shoes are drawn in by springs. The internal block is supplied with a signaling device of wear of slips.
In a cavity of the brake cylinder the piston with a sealing ring is established. At the expense of elasticity of this ring the optimum gap between blocks and a disk is supported.

Removal and installation of brake shoes
Removal

Fig. 6.23. The provision of a support of the brake mechanism at removal of brake shoes


Unscrew a bolt of fastening of the bottom directing finger of a support, turn a support up and suspend to a car body on a wire or in a different way (fig. 6.23) .
Remove brake shoes.

PREVENTION
Fig. 6.24. Brake shoes of a forward wheel

At removal of brake shoes do not press a brake pedal (fig. 6.24) .

Check of a technical condition
Check wear of brake shoes and if necessary replace them.
Replace blocks in the following cases:
– thickness of frictional overlays of less admissible;
– the surface of slips is greasy;
– the frictional slip is unsteadily connected to the block basis;
– slips have deep furrows and chips.
Check blocks on existence of damages or deformation.
The nominal thickness of frictional overlays of brake shoes makes
9 mm, maximum permissible at wear – 1 mm.

PREVENTIONS
Blocks replace in brake mechanisms of both forward wheels at the same time. Replacement of internal and external blocks among themselves, and also between left and right wheels is inadmissible. It can lead to non-uniform braking.
At replacement of brake shoes check blocks on deformation existence. Holding springs of directing fingers replace new or establish reusable springs, having cleared them of pollution.

Installation
Establish holding springs of blocks.

Fig. 6.25. Holding springs of brake shoes


Establish blocks in holding springs (fig. 6.25) .

       NOTE
Blocks establish so that the wear indicator on a block from the piston was turned up.

Fig. 6.26. Utaplivaniye of the piston in the cylinder by means of the adaptation 09581-11000


After installation of blocks before moving a support into position, drown the piston in the cylinder by means of the adaptation 09581-11000 (fig. 6.26) .

Fig. 6.27. Brake shoes with laying: 1–adjusting set of an internal brake shoe; 2–adjusting set of an external brake shoe; 3–laying of an external brake shoe; 4–external brake shoe; 5–an internal brake shoe with the wear sensor; 6–laying of an internal brake shoe; 7–cover of laying of an internal brake shoe


Establish new brake shoes with laying (fig. 6.27) .

PREVENTION
Do not allow greasing hit on brake disks and blocks.

Fig. 6.28. An inhaling of a bolt of fastening of a directing finger


Wrap a bolt of fastening of a directing finger of a support and tighten it a dinamometrichesky key (fig. 6.28) .

Removal and installation of the brake mechanism
Removal
Remove a wheel.

Fig. 6.29. Connecting details of a head of a brake hose: 1–brake hose; 2–brake mechanism; 3–sealing laying; 4–a bolt of fastening of a head of a hose to the brake mechanism


Disconnect a brake hose (fig. 6.29) .

PREVENTIONS
Do not allow hit of brake liquid on a car detail. It can damage a paint and varnish covering of a body. At liquid hit on a paint and varnish covering of a body immediately wash away it water.
For prevention of the passage of brake liquid wrap up connections of hoses by rags or napkins.

Unscrew a bolt of fastening of the cylinder.

Fig. 6.30. Elements of the brake mechanism of a forward wheel: 1–support; 2–directing blocks


Remove a support and brake shoes with directing blocks (fig. 6.30) .
Unscrew bolts of fastening directing blocks to a rotary fist.
Remove directing blocks.
Check of a technical condition
Check the following:
– a support on existence of wear, damages, cracks;
– the piston on existence of a dust, damages, cracks and wear of an external surface;
– the plug and directing finger on existence of damages and a dust;
– springs and protective caps of blocks on existence of damages;
– directing blocks on existence of damages, a dust, wear and cracks.

PREVENTION
Do not apply an emery paper to cleaning of a surface of the piston of the brake cylinder.
All rubber details replace new.

Fig. 6.31. Check of a technical condition of a brake disk


Check a brake disk by means of a calliper and the indicator (fig. 6.31) .
The nominal thickness of a brake disk (it is checked by means of a calliper) should be 19 mm, minimum admissible at wear – 17 mm.
The difference in thickness at measurement in different places of a disk should not exceed 0,01 mm.
Axial palpation of a working surface of a disk (it is checked by means of the strelochny indicator of hour type) should not exceed 0,04 mm (see fig. 6.31 ).

       NOTE
By means of a micrometer check thickness of a brake disk in eight points located at distance of about 10 mm from an edge of a disk with a step 45 °.
Define a difference in thickness of a disk as a difference between the greatest and smallest thickness.
For measurement of axial palpation of a working surface of a disk fix the strelochny indicator of hour type at distance about 5 mm from an edge of a disk and turn a disk on 360 °.

Define axial palpation of a working surface of a disk as a difference between the greatest and the smallest values of palpation.
Installation of the brake mechanism
Installation of the brake mechanism carry out as it should be, the return to removal, taking into account the following.
Do not allow greasing or oil hit on working surfaces of brake shoes and a disk.
Tighten bolts of fastening of the brake mechanism the specified moment.
Attach a brake hose to the hydraulic cylinder of the brake mechanism, having established new sealing laying.
Remove air  from  a hydraulic actuator  of brakes.
Dismantling and assembly of the brake mechanism
Dismantling
Remove a dustproof cover of the piston.

Fig. 6.32. Piston removal from the cylinder by means of a source of the compressed air (for prevention of damage of the piston at an exit from the cylinder on ledges of a support wooden laying is established)


Take the piston from the cylinder, having submitted to the cylinder the compressed air (fig. 6.32) .

PREVENTIONS
At piston pushing out by the compressed air protect fingers from blow.
Do not allow a razbryzgivaniye of brake liquid.

Screw-driver take from the cylinder a sealing ring of the piston, trying  not to damage a cylinder surface.
Assembly
All details, except brake shoes and their laying, wash out isopropyl alcohol.
Establish a sealing ring of the piston in the cylinder, previously put on a ring greasing for rubber details.
Put greasing for rubber details in a support pro-point, on an external surface of the piston and in a piston cover.

Fig. 6.33. Piston installation with a protective cover in the support cylinder


Establish a protective cover on the piston, as is shown in fig. 6.33 .
Get an otbortovka of a cover of the piston in an internal flute of a support and displace the piston in a support (see fig. 6.33 ).
Put greasing for rubber details on an external surface of the plug and directing finger, in an opening for the plug and a finger in a support, in a protective cap of a finger and a plug cap.

Fig. 6.34. Installation of protective caps of the plug and a finger on a support


Get a cap otbortovka in a support flute (fig. 6.34) .
Establish brake shoes.

       NOTE
Do not allow greasing hit on working surfaces of a brake disk and blocks.

Brake mechanism of a back wheel 

Fig. 6.35. Brake mechanism of a back wheel: 1–the mechanism of automatic adjustment of a gap between a drum and blocks; 2–top coupling spring of blocks; 3–the lever of the mechanism of automatic adjustment of a gap between a drum and blocks; 4–a spring of the mechanism of automatic adjustment of a gap between a drum and blocks; 5–washer; 6–bottom coupling spring of blocks; 7–a directing spring; 8–brake shoe; 9–a rack of a directing spring


The brake mechanism of a back wheel is shown on fig. 6.35 .
The brake mechanism of a back wheel drum-type, with automatic adjustment of a gap between blocks and a drum. The device of automatic adjustment of a gap is located separately from the wheel brake cylinder and directly is not connected with a hydraulic actuator of brakes.
Removal and installation of the brake mechanism
Removal
Release the parking brake.
Remove a wheel and a brake drum.

       NOTE
Fig. 6.36. Screw of fastening of a brake drum: 1–screw of fastening of a brake drum; 2–brake drum

For removal of a brake drum unscrew the fastening screw (fig. 6.36) .

Fig. 6.37. Elements of the brake mechanism of a back wheel: 1–wheel cylinder; 2–the lever of the mechanism of automatic adjustment of a gap between a drum and blocks; 3–a spring of the mechanism of automatic adjustment of a gap between a drum and blocks; 4–brake shoe; 5–bottom coupling spring of blocks; 6–a washer, a directing spring and a spring rack; 7–the mechanism of automatic adjustment of a gap between a drum and blocks; 8–top coupling spring of blocks


Remove a spring and the lever of the mechanism of automatic adjustment of a gap between a drum and blocks (fig. 6.37) .
Remove washers of racks of the directing springs, directing springs of blocks and a rack of directing springs (see fig. 6.37 ).
Shift brake shoes and remove the adjusting mechanism (see fig. 6.37 ).

Fig. 6.38. Removal of a brake shoe: 1–brake shoe; 2–lever of a drive of the parking brake; 3–cable of a drive of the parking brake


Remove the bottom and top coupling springs of blocks, disconnect a cable from the lever of a drive of the parking brake (fig. 6.38) .
Check of a technical condition

Fig. 6.39. Scheme of measurement of internal diameter of a brake drum


Check internal diameter of a brake drum (fig. 6.39) .
By means of the indicator check radial palpation of a brake drum.
Nominal internal diameter of a brake drum, mm:
cars without anti-blocking system of brakes..... 180
the cars equipped with anti-blocking system of brakes..... 203,2
Maximum permissible diameter of a brake drum, mm:
cars of bezantiblokirovochny system of brakes..... 182
the cars equipped with anti-blocking system of brakes..... 205,2
Maximum permissible radial palpation of a brake drum of 0,05 mm.
Check thickness of frictional overlays of brake shoes.
The nominal thickness of frictional overlays of brake shoes should be 5,14 mm, maximum permissible thickness – 1 mm.

Fig. 6.40. Check of a prileganiye of brake shoes to a drum


Check a prileganiye of brake shoes to a drum (fig. 6.40) .
Check an external surface of the wheel brake cylinder on existence of wear or damages.
Check a board of the brake mechanism on existence of wear or damages.
Installation

Fig. 6.41. Places of drawing of greasing


Put universal greasing SAE J310, NGLI No.2 in places of contact of brake blocks and a board of the brake mechanism, and also in places of contact of brake shoes and the bottom support (fig. 6.41) .
Attach a cable to the lever of a drive of the parking brake.
Establish brake shoes  and  directing springs.
Establish the mechanism of automatic adjustment of a gap between a drum and blocks and coupling springs of blocks.
Establish the lever and a spring of the mechanism of automatic adjustment of a gap between a drum and blocks.
Establish a brake drum and several times completely tighten the lever of lay brake system.

PREVENTION
Do not allow hit of greasing and other pollution on a working surface of a brake drum.

       NOTE
Fig. 6.42. Scheme of measurement of external diameter of brake shoes

Before installation of a brake drum check external diameter of brake shoes (fig. 6.42) (at the established blocks).

External diameter of brake shoes of cars without anti-blocking system (diameter of a drum of 7 inches) should be 179,5–179,0 mm; the cars equipped with anti-blocking system of brakes (diameter of a drum of 8 inches), – 202,2–201,7 mm.
Adjust a gap between blocks and a drum, having pressed a brake pedal with effort of 10 kgfs more than 20 times.
Dismantling and assembly of the brake cylinder
Remove brake shoes.
Disconnect from the cylinder the brake pipeline.

Fig. 6.43. Bolts of fastening of the wheel brake cylinder (view from a reverse side of a board of the brake mechanism)


Remove the wheel cylinder (fig. 6.43) .

Fig. 6.44. Brake cylinder: 1–case of the brake cylinder; 2–spring; 3–union of pumping of a hydraulic actuator of brake system; 4–sealing ring; 5–piston; 6–protective cap of the piston


Remove protective caps of pistons (fig. 6.44) .
Remove the piston and a sealing cuff of the piston (see fig. 6.44 ).
Remove a returnable spring (see fig. 6.44 ).
Before assembly of the wheel cylinder check:
– the cylinder and pistons on existence of wear, damages and a dust;
– the cylinder case on existence of damages and cracks;
– basic surfaces of pistons and blocks on wear existence;
– a piston spring on decrease in rigidity.
Assembly carry out as it should be, the return to dismantling.

       NOTE
Before assembly wash out a cavity of the cylinder and internal details isopropyl alcohol.
Put enough of brake liquid on sealing cuffs of pistons and a cylinder wall.
Always replace sealing cuffs and protective caps new.

PREVENTION
Track that the ball did not drop out of the union of pumping.