Audi 80/Avant (B4)

since 1991-1995 release

Repair and operation of the car

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
+ System of injection
+ Coupling
+ Transmission and transmission
+ Suspension bracket and steering
- Brake system
   Check of brake mechanisms
   Brake fluid
   Check of level of brake fluid
   Check of tightness of brake system
   Replacement of brake fluid
   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 brake mechanism
   Measurement of brake shoes of the drum mechanism
   Check of the 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 the hydraulic drive of brakes
   Pumping of brake system
   List of malfunctions
+ Anti-blocking system of brakes
+ Wheels and tires
+ Body electrical system
+ System of ignition
+ 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 has to begin with the third lock groove of the lever.
At the recorded fourth tooth back wheels have to 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 the brake drive. This certificate of that the parking brake was strongly tightened at each parking.
Adjustment of the parking brake is usually necessary only after replacement of a cable of the brake drive or blocks of disk brake mechanisms of back wheels.

Replacement of a cable of the brake drive

PERFORMANCE ORDER

To raise the car behind and to record.
To remove the car from the parking brake.
To weaken an adjusting nut on a yoke until a cable it does not become noticeable sagged.
To remove the brake drum, to remove brake shoes and to take out the back end of a cable from the lever of inclusion of system of the parking 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 the 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 the hummock drive.
Naveshivaniye of a cable of the parking brake on the driving lever of the drum 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 bokoreza 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 the brake drive are made a tension of cables of the 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 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 record.
Models with back drum brake mechanisms: to remove the car from the parking brake.
To turn out an adjusting nut until 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 has to 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 also moves, so cables of the brake drive are tense too strongly.
In this case to weaken an adjusting nut of cables of the 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.