Audi 80/Avant (B4)

since 1991-1995 of release

Repair and car operation

Audi 80/Avant
+ Technical specification
+ Engines
+ System of production of the fulfilled gases
+ cooling System
+ Fuel tank and fuel pump
+ Air filter and airintaking channels
+ injection System
+ Coupling
+ Transmission and transmission
+ Suspension bracket and steering
- Brake system
   Check of brake mechanisms
   Brake liquid
   Check of level of brake liquid
   Check of tightness of brake system
   Replacement of brake liquid
   Disk brake mechanisms
   Measurement of thickness of blocks of the disk mechanism
   Control of a condition of brake disks
   Replacement of blocks of disk brake mechanisms
   Drum-type brake mechanism
   Measurement of brake shoes of the drum-type mechanism
   Check of a course of a pedal of a brake
   Disk brake mechanism of back wheels
   Measurement of thickness of blocks of back disk brakes
   Check of a free wheeling of the lever of the parking brake
   Main brake cylinder
   Amplifier of brakes
   Check of the amplifier of brakes
   Regulator of brake forces
   Repair of a hydraulic drive of brakes
   Pumping of brake system
   List of malfunctions
+ Anti-blocking system of brakes
+ Wheels and tires
+ Body electrosystem
+ ignition System
+ Lighting
+ Signalling devices
+ Devices and auxiliary devices
+ Heating and ventilation
+ body Elements
+ Search of malfunctions
+ Specifications

Check of a free wheeling of the lever of the parking brake

PERFORMANCE ORDER

Operation of the parking brake should begin with the third lock groove of the lever.
At the fixed fourth tooth back wheels should be blocked.
On models with disk brake mechanisms on back wheels the free wheeling directly depends on functioning of the automatic adjusting device.
In general: if the course of the lever is longer usual, it indicates worn-out brake shoes on back wheels or the extended cables of a brake drive. This certificate of that the parking brake was strongly tightened at each parking.
Adjustment of the parking brake usually happens is necessary only after replacement of a cable of a brake drive or blocks of disk brake mechanisms of back wheels.

Replacement of a cable of a brake drive

PERFORMANCE ORDER

To raise the car behind and to fix.
To remove the car from the parking brake.
To weaken an adjusting nut on a yoke until a cable it is not becomes appreciable sagged.
To remove a brake drum, to remove brake shoes and to take out the back end of a cable from the lever of inclusion of system of a lay drive.
If on your car on back wheels there are disk brake mechanisms, it is necessary to hook a spring bracket on the end of a cover of a cable and to take out a tip of a cable of a brake drive from the drive lever.
To hang out and remove a drive cable from various krepezhy on a back axis and on the car bottom.
At assembly to establish a clamp on the forward end of a cover of a hummock drive.
Naveshivaniye of a cable of the parking brake on the driving lever of the drum-type brake mechanism can be connected with problems. Therefore it is necessary to remove a spiral spring on a cable nippers-bokorezami and to prevent its slipping, having softly clamped бокорезы on a cable. Now to hang a cable in the lever.
At models with disk brake mechanisms on back wheels it is necessary to carry out adjustment!
At all cars it is necessary to adjust system of the parking brake.

Regulation of system of the parking brake

At the left: regulation of the parking brake. By rotation of an adjusting nut (1) on a carving site (2) cables of a brake drive are made a tension of cables of a brake drive to wheels. The illustration shows approximately the middle of the bottom of the car.

On the right: the parking brake is adjusted correctly if the driving lever of a brake (2) slightly rises from an emphasis (1).

Thanks to the automatic adjusting devices which are available for models both with drum-type, and with disk brake mechanisms on back wheels, the system of the parking brake needs to be regulated only after works on mechanics of system of the parking brake or after replacement of brake shoes.

PERFORMANCE ORDER

To raise the car behind from both parties and to fix.
Models with back drum-type brake mechanisms: to remove the car from the parking brake.
To turn out an adjusting nut till the end of a carving bar.
Once strongly to press a brake pedal.
To lift the lever of the parking brake on two lock grooves (two clicks).
To tighten an adjusting nut so strongly that both wheels could be turned a hand with great difficulty.
To remove the car from the parking brake and to check a free wheeling of wheels.
Models with back disk brake mechanisms: to carry out adjustment.
To tighten an adjusting nut so strongly that both driving levers of the parking brake at supports of brake mechanisms on the right and at the left slightly rose from an emphasis. The assistant should check it.
Now to weaken an adjusting nut on two turns.
For control to press the lever of inclusion of system of the parking brake to supports of brake mechanisms on the right and at the left in turn to the corresponding emphasis. If the lever of a support of other wheel as moves, means, cables of a brake drive are tense too strongly.
In this case to weaken an adjusting nut of cables of a brake drive so that both levers were near an emphasis.
To tighten and again to weaken the parking brake; to check a free wheeling of back wheels.