Audi A4

since 1994 of release

Repair and car operation



A4 Audi
+ Running gear
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ exhaust System
+ cooling System
+ Fuel tank and fuel pump
+ Air filter and absorption channels
+ injection System
+ 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-section steering draft
   Check of dustproof caps of hinges of an axis
   Check люфта 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
   Shock-absorber replacement 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
   Safety instructions
+ Brakes
+ Wheels and tires
+ Electrotechnical equipment
+ ignition System
+ Lighting
+ Alarm equipment
+ Tools and devices
+ Heating and ventilation
+ body Details
+ Salon
Search of malfunctions
Technical characteristics





Dismantling of a suspension bracket of forward wheels

Details of a forward amortization rack and sequence of their assembly

1–a nut with a flange;
2–bearing of an amortization rack;
3–intermediate washer;
4–top spring plate;
5–spring;
6–shock-absorber buffer;

7–protective cover;
8–protective cap;
9–the bottom lining under a spring;
10-bottom spring plate;
11-shock-absorber.

At the left: dismantle of an amortization rack above. After removal of both protective caps it is possible to weaken nuts «1» and «2» top rigid fastenings of an amortization rack.

On the right: dismantle of an amortization rack below. The arrow indicates screw connection with the cross-section lever of a forward suspension bracket below.

 

The forward dismantled amortization rack

1–top bearing of an amortization rack;
2–spring;

3–shock-absorber;
4–vilochny head.


In order that in the dismantled amortization rack to separate a spring from the shock-absorber, spring coupling collars (shooters) are used.

 


At the left: the provision of a corner (And) the top plate of a spring on the right (R) and at the left (L) mirror in relation to a screwing up axis below at a bifurcate head (1). The arrow showed the direction of movement (F).

On the right: the assembly provision of the bottom plate of a spring (1) on the shock-absorber (2): the opening (shooter) is with shift outside in 90 ° in relation to an axis of screwing up (And).

In knots of a suspension bracket of forward wheels a lot of things can be disassembled and collected independently though for carrying out certain works tools from a workshop are necessary. The damaged details of a suspension bracket of wheels cannot be corrected or even to weld, it is necessary to replace them only.

Dismantle of a forward amortization rack

Dismantle of an amortization rack in Audi A4 is not especially labor-consuming. Pleasantly also that it is not necessary to measure adjustment of wheels anew.

 PERFORMANCE ORDER

  1. Get new самоконтрящиеся nuts for fastening of an amortization rack below and above, and also for the top screw connection of the bearing hinge.
  2. Lift both rubber tips in the moistening tank (they close the top screw connections of amortization racks).
  3. Unscrew under them both nuts of an amortization rack.
  4. Lift and fix a forward part of the car.
  5. Remove a wheel.
  6. Disconnect on an amortization rack a wire to the sensor of number of turns of ABS.
  7. Unscrew a nut of a tightening bolt of the top hinge of an axis. Take out tightening a bolt.
  8. Take out axis hinges up from the case of the wheel bearing (rotary fists). Thus at all do not expand, for example, with a screw-driver of shlitsa in the case of the wheel bearing.
  9. Do not wring out the hinge of cross-section steering draft.
  10. Cast away outside the case of the wheel bearing.
  11. Unscrew the bottom screw connection of an amortization rack.
  12. Carefully take out an amortization rack from a wheel niche.
  13. Installation: establish an amortization rack so that the opening in the bottom plate of a spring was turned to the car center.
  14. Tighten the bottom fastening of an amortization rack on 90 Nanometers.
  15. Insert bearing hinges into the case of the wheel bearing against the stop.
  16. Insert tightening a bolt of the top hinges of an axis, tighten a nut on 40 Nanometers.
  17. Again fix ABS wire.
  18. Tighten the top nuts of an amortization rack on 20 Nanometers.

Replacement of the forward shock-absorber

For this work which is led on the dismantled amortization rack, the spring tension device surely is required., At least, two tension devices are used; better three. Without use of the tension device it is impossible to weaken a nut with a flange above on the piston of a rod of the piston of the shock-absorber as the spring is under a high preliminary tension. Details of an amortization rack can scatter in different directions, as at explosion, – extreme danger of receiving traumas! Besides, it is impossible to establish the weakened spring.

 PERFORMANCE ORDER

  1. Dismantle an amortization rack.
  2. Clamp an amortization rack for a bifurcate head in a vice. Never tighten in the field of a cylindrical detail, differently the amortization rack will be squeezed.
  3. Establish the tension device on rounds of a spring and slightly compress a spring.
  4. In order that tension devices did not slide off, paste over the corresponding rounds of a spring with a sticky tape.
  5. Weaken a nut with a flange above an amortization rack. By means of a natural an internal shestigrannik wring out to the opposite side a rod of the piston of the shock-absorber.
  6. Remove a spring with auxiliary details.
  7. Remove a protective cap and a lining under a spring.
  8. Separate a plate of a spring a plastic hammer and remove it.
  9. Installation: put on a plate of a spring the new shock-absorber.
  10. Pay attention to assembly situation: the opening in a plate of a spring should be with shift in 90 ° in relation to openings in a bifurcate head below on the shock-absorber (a tolerance only 2 °).
  11. Establish a lining under a spring, a protective cap and a cover, and also the persistent shock-absorber.
  12. Establish on a plate a spring which is still under a tension; track that the bottom end of rounds of a spring adjoined to an emphasis of a plate of a spring.
  13. Put on the top plate of a spring with the bearing of an amortization rack and a washer.
  14. Twirl a plate of a spring according to drawing on 11 ° to an axis of screwing up of the shock-absorber (below at a bifurcate head). On the right and left side the different directions.
  15. Work precisely: the admission is made only 2 °.
  16. Tighten a nut with a flange above on an amortization rack on 60 Nanometers. By means of a natural an internal shestigrannik wring out to the opposite side a rod of the piston of the shock-absorber.
  17. Weaken a spring tension, thus track that the end of a spring adjoined to an emphasis of a lining of a spring.

Dismantle of the forward wheel bearing

Here figures (1–3) designated fixing bolts of the top arm of the bearing of a forward axis.

The wheel bearing is pressed by the external ring in the case, in an internal ring of the bearing the wheel nave is pressed. The new wheel bearing by no means cannot be earned in a nest a hammer, differently the next damage «will be mounted together with it». Therefore the extraction and a press fitting of the bearing are done by a workshop where on hand there is a repair press.

Replacement of the lever of an independent suspension bracket of an axis

Both arrows indicate so-called flange nuts by means of which axis hinges on the case of the wheel bearing fasten.

On four levers of a suspension bracket on each outer side of a forward axis it is impossible to get bearing hinges (axis hinges) separately the same as their cuffs. From this it follows that at defect of the bearing hinge it is necessary to change all lever of an independent suspension bracket at once.

Not affairs with rezinometallichesky support on inside of levers of a suspension bracket of an axis so are. They in a workshop can be wrung out and pressed separately. Thus it is necessary to adhere to their assembly situation precisely. We prefer and we describe replacement assembled as the press fitting should be made in a workshop. Besides, in this case the axis hinge thanks to what the following defect in the same knot is excluded is at the same time replaced.

Dismantle of both levers of an independent suspension bracket of an axis above

 PERFORMANCE ORDER

  1. Should be replaced all самоконтрящиеся nuts and bolts of a bearing support of the lever of a suspension bracket of an axis/arm; get the new.
  2. In the beginning dismantle an arm above: the car needs to be lifted and fixed.
  3. Unscrew in an impellent compartment three fixing bolts of an arm.
  4. Dismantle a wheel.
  5. Disconnect a wire of the sensor of number of turns of ABS on an amortization rack.
  6. Unscrew a nut of a tightening bolt of the top hinges of an axis. Unscrew tightening a bolt.
  7. Take out axis hinges above from the case of the wheel bearing (rotary fists). Thus at all do not expand shlitsa of the case of the wheel bearing, for example, with a screw-driver.
  8. Do not wring out the hinge of cross-section steering draft.
  9. Cast away outside the case of the wheel bearing.
  10. Unscrew the bottom screw connection of an amortization rack.
  11. Carefully take out from a wheel niche an amortization rack together with an arm.
  12. Weaken screw connections of hinges of an axis.
  13. Installation: screw levers of a suspension bracket of an axis, having slightly inclined them down so that between external edge of an arm and levers of a suspension bracket of an axis there was a distance in 55 mm (the admission of 2 mm).
  14. The moment of an inhaling of levers of a suspension bracket of an axis above on an arm: 50 Nanometers. Then tighten on 1/4 turns.
  15. Again insert an amortization rack with an arm.
  16. Tighten the bottom fastening of an amortization rack on 90 Nanometers.
  17. Insert bearing hinges against the stop into the case of the wheel bearing.
  18. Insert tightening a bolt of the top hinges of an axis, tighten nuts on 40 Nanometers.
  19. Again fix ABS wires.

Dismantle (bearing) levers of an independent suspension bracket below

 PERFORMANCE ORDER

  1. Replace everything самоконтрящиеся nuts, and also bolts of a bearing support of the lever of a suspension bracket of an axis/body of an axis; the same treats a flange nut on outer side of the hinge of an axis and to ridge nuts of a connecting bar of the stabilizer.
  2. Lift the car and fix it.
  3. Dismantle a wheel.
  4. Unscrew from outer side on the axis hinge a flange nut, wring out a hinge neck from a conic nest on the case of the wheel bearing the corresponding demountable device (for example, a big stripper for cross-section steering draft).
  5. Unscrew the bottom screw connection of an amortization rack.
  6. Unscrew a ridge nut of a connecting bar of the stabilizer, remove a connecting bar.
  7. Weaken screw connection of the lever of a suspension bracket of an axis/body of an axis.
  8. Take out bearing lever of a suspension bracket of an axis.
  9. Installation: clean a neck of the hinge of an axis. Tighten a flange nut of the hinge of an axis on 100 Nanometers.
  10. Tighten the bottom fastening of an amortization rack on 90 Nanometers.
  11. Again insert screw connection of the lever of a suspension bracket of an axis/body of an axis. Use thus internal openings on a body. At a tightening wring out inside the lever of a suspension bracket of an axis. Tighten a nut on 90 Nanometers. Then tighten it on 1/4 turns.
  12. Insert a connecting bar of the stabilizer (the arrow specifies the movement direction), tighten a ridge nut on 90 Nanometers.
  13. The nut and big bolts of a support of the unit, and also flange nut on outer side on the axis hinge should be replaced a bolt of a bearing support of the lever of a suspension bracket of an axis/body of an axis, it самоконтрящаяся.

Dismantle (directing) levers of an independent suspension bracket below

In drawing the distance "And" on which the top cross-section levers of an independent suspension bracket (or their line of a descent should be removed from the top arm) when screw connections (1) are tightened is shown.


 PERFORMANCE ORDER

  1. Lift the car and fix it.
  2. Dismantle a wheel.
  3. Unscrew from outer side on the axis hinge a flange nut, wring out a hinge neck from a conic nest on the case of the wheel bearing the corresponding demountable device (for example, a big stripper for cross-section steering draft).
  4. Weaken screw connection of the lever of a suspension bracket of an axis/body of an axis.
  5. To take out a universal bolt (it cannot be used repeatedly), it is necessary to lower an axis body.
  6. Therefore unscrew on basic guards both bolts of the smaller size with six-sided heads, and also larger bolt (a bolt of a support of the unit).
  7. Take out the lever of a suspension bracket of an axis.
  8. Installation: clean a neck of the hinge of an axis. Tighten a flange nut of the hinge of an axis on 100 Nanometers.
  9. Again insert screw connection of the lever of a suspension bracket of an axis/body of an axis. Use thus internal openings on a body. At a tightening wring out inside the lever of a suspension bracket of an axis. Tighten a nut on 90 Nanometers. Then tighten it on 1/4 turns.
  10. Tighten both smaller bolts with six-sided heads on basic guards on 25 Nanometers, larger bolt (a bolt of a support of the unit) tighten on 110 Nanometers. Then tighten it on 1/4 turns.