Audi A3
+ Maintenance instruction
+ Current leaving and service
+ Engine
+ Systems of cooling, heating
+ the Power supply system and production of the fulfilled gases
+ engine Electric equipment
+ Manual box of gear shifting
+ Automatic transmission and models with a full drive
+ Coupling and power shafts
- Brake system
Replacement of forward brake shoes
Removal and installation of disk brake mechanisms of back wheels
Check of thickness of a brake disk
Removal and installation of a brake disk/support
Adjustment of the parking brake
Brake liquid
Air removal from brake system
Removal and installation of a brake hose
Check of the amplifier of a brake
Removal, installation and adjustment of the switch of a stoplight
Removal and installation of the lever and cable of the parking brake
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Elektroskhema
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Removal and installation of a brake disk/support
The brake disks having corrosion, create effect of vibration which does not disappear at longer braking when braking. In this case it is necessary to replace brake disks.
REMOVAL
| PERFORMANCE ORDER |
| 1. Mark paint the provision of wheels concerning a nave. It will allow to establish at assembly an otbalansirovanny wheel in its former situation. Weaken bolts of fastening of a wheel on the car standing on the earth. Lift the car and establish it on supports. Remove wheels. | | 2.
A forward brake with FN-3 support: Turn out 2 bolts of fastening (are specified by shooters) and remove a support with directing from a brake disk. FN-3 support, is given in an illustration the Disk brake mechanism of back wheels in the subsection Removal and installation of disk brake mechanisms of back wheels. | | 3. A forward brake with FN-III support: Remove brake shoes, thus address to subsection Replacement of forward brake shoes. |
| 4. Brakes of back wheels: Turn out 2 bolts of fastening of a support at a beam of an axis and remove a support from a brake disk, thus address to an illustration the Disk brake mechanism of back wheels in the subsection Removal and installation of disk brake mechanisms of back wheels. | 5. Fix a support on a hook from a wire on a suspension bracket so that the brake hose was not tense.
ATTENTION Brake hose do not disconnect, otherwise after installation it is necessary to delete air from brake system.
| 6. If the support has to act in film completely:
– At a forward support unscrew the brake pipeline at the coupling.
– At a back support at first unscrew the brake pipeline at a junction with a hose. Then, if it is necessary, unscrew a hose at a support. In addition disconnect a cable of the parking brake.
ATTENTION When opening a brake contour brake liquid follows. Liquid is necessary for collecting in the capacity intended specially for this purpose. It is possible to extort also liquid previously from the tank.
| | 7. Turn out the screw with crosswise shlitsy fastenings of brake disks. |
8. Remove a brake disk.
ATTENTION It is impossible to remove a brake disk from a nave with use of force (blows a hammer). It is necessary to use for this purpose means for rust dissolution. If removal of a disk possibly only with application of blows of a hammer, for safety reasons is necessary to replace brake disks and bearings of wheels. Replacement of bearings should be made in conditions HUNDRED as only there, as a rule, there can be available the corresponding press. After application of a stripper it is also necessary to replace brake disks.
| | INSTALLATION
For receiving uniform braking from both parties both brake disks should have an identical surface concerning a roughness. Therefore it is necessary to replace both brake disks. In conditions HUNDRED it is possible to check a disk on palpation. Maximum palpation of a surface of a disk: 0.05 mm; the maximum admissible difference in thickness of disks: 0.01 mm.
| PERFORMANCE ORDER |
| 1. Measure thickness of a brake disk, thus address to appropriate section. | | 2. If is available, remove a rust on a flange of a brake disk and a nave. |
| 3. Clear a new disk a thinner of a protective varnish. | | 4. Establish new brake disks on a nave and fix screws with a crosswise head. | | 5. Brakes of forward wheels with FS-III support: Establish brake shoes, thus address to subsection Replacement of forward brake shoes. |
6. Brakes of forward wheels with FS-3 support: Establish a support with brake shoes. Thus watch that it was not overwound or will pull a brake hose. Fix a support the moment of 125 N • m.
ATTENTION If old ridge bolts again are applied, clear previously edges a brush.
| 7. Brakes of back wheels: fix the moment of 65 N • m. Connect a cable of the parking brake.
ATTENTION If the brake hose acted in film, establish it and remove air from brake system, thus address to subsection air Removal from brake system.
| 8.
Establish wheels so that the markings put at removal coincided. Previously grease with a thin layer of bearing greasing aligning corbel of a rim on a nave. Wrap bolts of fastening of wheels. Lower the car on wheels and tighten bolts a cross – crosswise the moment of 120 N • m.
ATTENTION
Several times strongly press a brake pedal so that distinct resistance of a pedal was felt. Thus blocks will lie down to a brake disk and will take the place.
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| 9. Check level of brake liquid in the tank. If necessary add. | 10.
Brakes of back wheels: Adjust the parking brake, thus address to subsection Adjustment of the parking brake.
ATTENTION inspect reliability:
– Whether fastenings of brake hoses are reliably tightened?
– Whether the brake hose in the holder is fixed?
– Whether unions of removal of air are tightened?
– Whether it is enough in the tank of brake liquid?
– At the working engine check tightness of system. For this purpose press a brake pedal effort of 200-300 N (20-30 kg) during 10 pages. The pedal should not depart. Check on tightness all connections
| | 11.
Carefully let's be earned extra to new brake shoes. For this purpose several times brake the car since speed 80 to 40 km/h slightly pressing a pedal. Between braking let's be cooled to a brake. | |
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