Audi 80/Avant (B4)

Since 1991-1995 of release

Repair and car operation

Audi 80/Avant
+ The description
+ Engines
+ System of release of the fulfilled gases
+ Cooling system
+ Fuel tank and the fuel pump
+ The air filter and воздухозаборные channels
+ Injection system
+ Coupling
+ Transmission and transmission
+ Suspension bracket and steering
- Brake system
   Check of brake mechanisms
   Brake liquid
   Check of level of a brake liquid
   Check of tightness of brake system
   Replacement of a brake liquid
   Disk brake mechanisms
   Measurement of a thickness колодок the disk mechanism
   The control of a condition of brake disks
   Replacement колодок disk brake mechanisms
   The drum-type brake mechanism
   Measurement brake колодок the drum-type mechanism
   Check of a course of a pedal of a brake
   The disk brake mechanism of back wheels
   Measurement of a thickness колодок back disk brakes
   Check of a free wheeling of the lever of a lay brake
   The main brake cylinder
   The amplifier of brakes
   Check of the amplifier of brakes
   Regulator of brake forces
   Repair of a hydraulic drive of brakes
   Prorolling of brake system
   The list of malfunctions
+ Antiblocking system of brakes
+ Wheels and tyres
+ Kuzovnaja electrosystem
+ Ignition system
+ Illumination
+ Signalling devices
+ Devices and auxiliary devices
+ Heating and ventilation
+ Body elements
+ Search of malfunctions
+ Specifications


The drum-type brake mechanism

On the front-wheel models Audi 80 which have been let out till October of 92 (not equipped ABS), on the back bridge there are drum-type brake mechanisms. On this version of the brake mechanism two brake Pads nestle on an internal surface of a drum the piston of the brake cylinder (it is located between the top ends brake колодок). Thanks to an arrangement brake колодок in applied in Audi 80 drum-type brake mechanism (brake mechanism Simplex – one brake cylinder with two pistons) one of two brake колодок operates in the self-amplifying image. It means that this brake колодка because of wheel rotation nestles on a brake drum in certain limits spontaneously that reduces effort to pedals. In Audi 80 (at advance) operates spontaneously forward brake колодка. On a slang of experts it is called as primary колодкой or active brake колодкой. Back is called according to secondary колодкой or as passive brake колодкой.

The self-regulated drum-type brake mechanism

Drum-type brake mechanisms should not be regulated. This problem has incurred, in отличае from disk brake mechanisms, the adjusting mechanics. With increasing deterioration of a frictional covering rods of cylinders between brake колодками are put forward, that Pads again could nestle on a drum. It is provided with a wedge with a spring drive which in process of deterioration колодок puts forward rods.