Audi A4

since 1994 release

Repair and operation of the car



A4 Audi
+ Running gear
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ System of an exhaust
+ Cooling system
+ Fuel tank and fuel pump
+ Air filter and channels of absorption
+ System of injection
+ Coupling
+ Transmission and main transfer
- Suspension bracket of wheels and steering
   Running gear
   Check of cuffs of the steering mechanism
   Check of dustproof caps and gap in heads of cross steering draft
   Check of dustproof caps of hinges of an axis
   Check of a side play of a steering wheel
   Check of a maple belt
   Check of level of oil
   Check of a gap of the wheel bearing
   Shock-absorbers
   Check of shock-absorbers
   The help at malfunctions
   Adjustment of wheels
   Measurement of adjustment of wheels
   The help at malfunctions
   Independent works on a running gear and a steering
   Dismantling of a suspension bracket of forward wheels
   Works with the back bridge
   Replacement of the shock-absorber behind
   Steering
   Works on a steering
   Check of tightness of a servoupravleniye
   Poliklinova belt
   The help at malfunctions
   Adjustment of the steering mechanism
   Dismantle of the pump of a servoupravleniye
   Filling and pumping of system of a servoupravleniye
   Safety cushion
   Instructions of safety
+ Brakes
+ Wheels and tires
+ Electrotechnical equipment
+ System of ignition
+ Lighting
+ Alarm equipment
+ Tools and devices
+ Heating and ventilation
+ body Details
+ Salon
Search of malfunctions
Technical characteristics





Replacement of the shock-absorber behind

The image of separate details of a back depreciation rack in assembly sequence in Audi with the forward drive

1 – cap;
2 – shnurovy ring;
3 – lock nut;
4 – dish-shaped washer;
5 – basic ring;
6 – penoplastovy laying;
7 – top plate of a spring;
8 – top overlay of a spring;
9 – rasporny tube;
10 – basic ring;

11 – washer;
12 – ring;
13 – rubber shock-absorber;
14 – reception ring of a harmonica (15);
16 – protective cap;
17 – spring;
18 – lining;
19 – lower lining of a spring;
20 – gas-filled shock-absorber.


The assembly provision of the top plate of a spring and cap in front-wheel Audi (a back suspension bracket)

And – a shock-absorber eye axis (below);
In – the provision of hairpins with a carving;

With – a cap axis;
a – size of a corner 45 °.

Here separate details of a back depreciation rack in Audi A4 quattro are represented in assembly sequence

1 – support of a depreciation rack;
2 – samokontryashchayasya nut;
3 – the damping ring;
4 – spring;

5 – bolt;
6 – shock-absorber case
21 ° – the size of angular shift of the top fastening in relation to the lower fastening of the shock-absorber.

At the left: the cap of a nave can be wrung out if to establish a stupid chisel between camber of a cap of a nave and a nave.

On the right: the press washer (1) under an adjusting nut (2) has to move a screw-driver if the gap of the wheel bearing is correctly established. Thus it is impossible to lean a screw-driver blade about a brake disk.

Back suspension bracket of Audi A4 quattro

At the left: the arrow indicates the lower screw connection of a depreciation rack on cross steering draft.

On the right: here figures designated fixing bolts of a depreciation rack / a wheel niche (1, 2, 4, 5), and also the top fastening of the shock-absorber (3).

Before replacement of shock-absorbers it is necessary to establish what is established a running gear. Only after it it is possible to order the necessary shock-absorbers. It can be found out on a sticker with information on the car at the bottom of a luggage carrier or in dredging for a spare wheel.

Symbols:

  • VA – serial model
  • VE – a sports running gear

The shock-absorber separates from the dismantled depreciation rack with the help of the spring tension device. Such tension devices are on sale in shop of the accompanying goods. It is important to know that the fixing eye of the shock-absorber has to be under a certain corner to the top fastening of a depreciation rack. The workshop of Audi uses the spring tension device with an angular scale to its correct installation. Without this device it is necessary to use intuition and a goniometer.

Dismantle of back shock-absorbers

Cars with the forward drive

Along with new shock-absorbers use also new samokontryashchuyusya a nut for the top fastening of the shock-absorber:

 PERFORMANCE ORDER

  1. Dismantle a depreciation rack and clamp it in a vice for the lower fixing eye. Do not clamp it in the field of external diameter, differently it will be pressed through.
  2. Install the tension device on rounds of a spring and slightly squeeze a spring.
  3. In order that the tension device did not slide off, paste over the corresponding rounds of a spring with an adhesive tape.
  4. Wring out a protective cap, weaken above on a connecting bar of the stabilizer samokontryashchuyusya a nut, thus wring out a bar in an opposite direction a key with an internal hexagon.
  5. After unscrewing of a nut remove details of the top support of a depreciation rack and put them in sequence of dismantle.
  6. Remove a spring and auxiliary details from the shock-absorber.
  7. At assembly pay attention that: the basis of a spring and a lining are greased with talc and at assembly are corrected in the direction of a shock-absorber eye.
  8. Establish still squeezed spring.
  9. The color tag on a spring is turned down to a plate of a spring.
  10. At the correct installation the lower end of a spring adjoins to a lining emphasis.
  11. Assembly of details in that order, as shown in drawing above.
  12. Above the end of a spring also adjoins to the top dredging for a spring eye.
  13. Correct the shock-absorber and a plate of a spring above as it is shown in drawing above.
  14. Tighten a fixing nut above on 25 Nanometers.
  15. If it is necessary, move for the end of a spring a spring lining below and a lining on an emphasis.
  16. Slowly weaken a spring.
  17. Put on from above a cap, thus correct its arrangement according to drawing.
  18. About installation of a depreciation rack see in the previous section.

Dismantle of back shock-absorbers

Quattro cars

Along with new shock-absorbers use also new samokontryashchuyusya a nut and a new bolt for the top fastening of the shock-absorber:

 PERFORMANCE ORDER

  1. Dismantle a depreciation rack and clamp it in a vice for the lower fixing eye. Do not clamp it in the field of external diameter, differently it will be pressed through.
  2. Install the tension device on rounds of a spring and slightly squeeze a spring.
  3. In order that the tension device did not slide off, paste over the corresponding rounds of a spring with an adhesive tape.
  4. Weaken samokontryashchuyusya a nut of the top fastening of the shock-absorber, take out a bolt.
  5. Remove the shock-absorber, a spring and the damping ring.
  6. Establish still the squeezed spring.
  7. The color tag on a spring is turned below to a plate of a spring.
  8. The lower end of a spring adjoins to dredging of an eye of a spring below on the shock-absorber.
  9. Above the end of a spring too adjoins to dredging of a depreciation ring.
  10. Again collect a depreciation rack (a spring still under a tension).
  11. In the beginning freely manually screw the top fastening of the shock-absorber on the top part of a depreciation rack (the so-called adapter).
  12. Correct the shock-absorber and the top part of a depreciation rack so that the imagined axes of both fixing openings of shock-absorbers were on the relation to each other at an angle 21 ° (the admission only 2 °). Thus the lower opening is in front turned to outer side of the car (see drawing on the right above).
  13. In this situation unload a spring.
  14. Now tighten a nut of a fixing bolt of the shock-absorber on 70 Nanometers. Then tighten it on 1/2 turns.
  15. About installation of a depreciation rack see in the section above.

Replacement of the bearing of a back wheel

Cars with the forward drive

 PERFORMANCE ORDER

  1. On each party one new forelock, one internal and one external bearing, and also a sealing ring is used.
  2. Lift and fix the car.
  3. Dismantle brake disks (head Tormoza), for this purpose dismantle a support.
  4. Remove a cap for greasing of the wheel bearing.
  5. Straighten the safety forelock and take out it.
  6. Remove a stopper of a koronchaty nut and unscrew a six-sided nut.
  7. Remove a press washer and the external wheel bearing.
  8. Wring out behind in the middle of a wheel nave a sealing ring, take out the bearing and wipe old greasing in a nave.
  9. Take out the rotating rings of both bearings from the middle of a nave of a wheel. For this purpose put from the different parties a brass core to the rotating ring from within and in soft blows of a hammer beat out it outside. Track that the ring was not bent.
  10. Establish a new ring of the bearing on a wheel nave. For protection put from above an old ring of the bearing (the thick party down) in order that at careful driving in there were no damages on a working surface of the new bearing.
  11. Hammer all rings of bearings against the stop.
  12. Now again take out all old rings of bearings put for protection.
  13. Fill with greasing intermediate space between both rings of the bearing, and also a ring and bearings.
  14. Insert the internal bearing.
  15. Evenly hammer with a rubber hammer a sealing ring on inside.
  16. Pull a wheel nave over the end of an axis.
  17. Put on the external wheel bearing and a press washer.
  18. Manually screw a six-sided nut on the end of an axis; thus constantly turn a wheel in order that the bearing was not bent.
  19. Adjust the wheel bearing (see the following section).
  20. Establish a brake disk and a support (head Tormoza). Then several times press a brake pedal.

Adjustment of the bearing of a back wheel

Cars with the drive on forward wheels

 PERFORMANCE ORDER

  1. Lift back part of the car and record it.
  2. The wheel in cars with steel rims can be not dismantled. If rims from light metals, a wheel it is necessary to remove to improve access.
  3. Remove a nave cap, the forelock and a koronchaty stopper as it is described above.
  4. Put the six-sided clamp without effort, rotating thus a wheel not to clamp the bearing.
  5. Again weaken a nut a little.
  6. The gap is established correctly if the press washer behind a nut can be a little shifted by a screw-driver with strong pressing of a finger. Do not damage a screw-driver edge of a nave of a wheel.
  7. If now the lock forelock cannot be advanced through a koronchaty stopper, turn a nut in the direction of screwing up a little.
  8. Pull a nave cap by means of a rubber hammer if it is necessary, put between them the curtailed rag.

Wheel bearing of the quattro models

The all-wheel drive model has pressed double ball-bearings also on a back axis. They do not need to be regulated, but due to the lack of necessary press stamps they cannot be replaced by own efforts.