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
   Mechanical transmission
   Noise in a transmission
   Automatic transmission
   Electronic control by a transmission
   Main transfer
   Power shafts
   Check of cuffs of power shafts
   The help at malfunctions
+ Suspension bracket of wheels and steering
+ 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





The help at malfunctions

Power shafts

Usually to power shafts there are no problems. Their durability depends, certainly, on style of driving of the car. Start with completely wrung out pedal of gas and the turned forward wheels and a start of motion with being turned forward wheels lead to emergence of premature defect.

  • In hinges of power shafts defects which then completely disappear are often suddenly shown. "Dormant period" can be stretched about several days and kilometers of the passable way.
  • At supply of gas and gear shifting rhythmical beating or clicking sounds are characteristic. If these sounds still change depending on wheel turn, that, possibly, defect in the hinge from a wheel.
  • Vibration and wheel shiver at the turned wheels also indicate the damaged external hinge.

The new bolt with a flange and with a six-sided head for a sharnirny shaft outside on a wheel nave as it is stretched at an inhaling is necessary to you and consequently with a view of safety should not be put repeatedly. Then new laying for the internal hinge of a shaft (only in cars with the four-cylinder engine and a mechanical transmission).

 PERFORMANCE ORDER

  1. Remove a cap of a wheel or the central cover at rims from light metals.
  2. Weaken wheel bolts.
  3. Weaken a bolt with a six-sided head on a wheel nave; for this Audi should stand reliably on the earth.
  4. Lift a forward part of the car and fix.
  5. Remove a wheel.
  6. If it is necessary, dismantle a cover of a power shaft on a transmission.
  7. Take out from an arm a wire to the sensor of number of turns of ABS, slightly delay back the sensor of number of turns.
  8. Unscrew bolts of shaft with an internal multigear head on a transmission.
  9. Wring out the driveshaft from a flange from a drive on a transmission.
  10. To take out a shaft, turn as appropriate a wheel.
  11. Installation: put new laying on the internal hinge (only in cars with the four-cylinder engine and a mechanical transmission). For this purpose remove from laying a protective film.
  12. In the beginning insert a power shaft from a wheel. Then cross-wise tighten fixing bolts on a flange of a power shaft from a transmission (bolts М8: 40 Nanometers; bolts М10: 77 Nanometers). Do not forget podkladny plastinochka in gomokinetichesky hinges!
  13. Lower the car, block wheels. Tighten a new bolt of a nave of an axis how it is shown below:
  14. Bolt М14: tighten on 115 Nanometers and then on 1/4 turns (90 °).
  15. Bolt М16: tighten on 190 Nanometers and then on 1/4 turns (90 °).
  16. Again push manually the sensor of number of turns of ABS against the stop.

 Council: Audi describes shaft dismantle after removal of cross-section steering draft and both bearings of hinges of an axis. But dismantle of a power shaft can be carried out by us – as is described above – without unscrewing of the case of the wheel bearing (the well-known name «a rotary fist»).


The arrow indicates the central bolt of the external hinge which should be removed at dismantle of power shafts.


The internal hinge acts in film from a transmission after weakening of six bolts with internal multigear heads (arrow). Here the tripod type hinge on an automatic transmission is shown.

Dismantle of a back power shaft of quattro

For assembly the new combined bolt with a six-sided head for a sharnirny shaft on a wheel nave from outer side is necessary to you. The old bolt for reasons of safety cannot be used again. Besides, new laying for the internal hinge of a shaft, a podkladny washer and самоконтрящаяся a nut for fastening of the lever of an axis above, and also самоконтрящаяся a nut for a connecting bar of the stabilizer is necessary to you.

 PERFORMANCE ORDER

  1. Remove a cap of a wheel or rim facing from light metal in the middle.
  2. Weaken wheel bolts.
  3. Weaken a wheel bolt with a six-sided head in a wheel nave; for this Audi should stand reliably on the earth.
  4. Lift and fix a back part of the car.
  5. Dismantle a wheel.
  6. For dismantle of the left power shaft dismantle the intermediate exhaust silencer of system of an exhaust (head exhaust System).
  7. Unscrew shaft bolts with an internal multigear head on differential of a back axis.
  8. Slightly shift back the sensor of number of turns of ABS.
  9. Disconnect a fixing bolt of a connecting bar of the stabilizer from the case of the wheel bearing (a rotary fist).
  10. Unscrew the axis lever above from the case of the wheel bearing (a rotary fist).
  11. Wring out a sharnirny shaft from a drive flange on a transmission.
  12. Take out a shaft.
  13. Installation: put new laying on the internal hinge. For this purpose remove a protective film on laying.
  14. Establish a sharnirny shaft in the beginning from a wheel. Then cross-wise tighten fixing bolts on a flange of a power shaft from a transmission (40 Nanometers). Do not forget podkladny plates
  15. Again mount an axis suspension bracket. In the beginning screw up manually screw connection of the case of the wheel bearing and the axis lever. Tighten a nut of a connecting bar of the stabilizer on 50 Nanometers.
  16. Again mount exhaust system.
  17. Lower the car. Block wheels.
  18. Tighten a new bolt of a nave of an axis how it is told further: tighten on 115 Nanometers and then tighten on 1/4 turns (90 °).
  19. Tighten finally screw connection of the case of the wheel bearing/lever of an axis in the car standing on wheels: on 70 Nanometers and then on 1/4 turns (90 °).
  20. Manually again push against the stop the sensor of number of turns of ABS.

 Councils: Do not move cars with the dismantled sharnirny shaft, the wheel bearing differently will be damaged. As a last resort, establish only the external hinge.

Depending on engine and transmission model in Audi different power shafts are put. Upon purchase of a new detail have at itself identification number of the engine and the car.

Dismantle of the external hinge

For all models

1–lock ring;
2–remote washer;
3–tarelchaty spring.


 PERFORMANCE ORDER

  1. Dismantle a power shaft.
  2. On a serviceable cuff unbend a big shlangovy collar, shift a protective cover.
  3. If the cuff is damaged, replace it completely.
  4. With aluminum or synthetic hammer strongly strike from within on the hinge and thus remove it from a shaft.
  5. Before installation of the new hinge insert a new lock ring into a flute of a power shaft.
  6. Establish a tarelchaty spring and a remote washer – if they are established in this version of a power shaft – how is shown in drawing above. Do not forget to put a rubber cuff.
  7. At installation hammer the hinge on a shaft a synthetic hammer so that the lock ring entered into a groove.
  8. Grease the hinge: in the new hinge with external diameter of 89 mm 90 g of MoS2 greasing (VW G6), from them 40 g are pressed into the hinge and 50 g in a cuff.
  9. More greasing is put in hinges with external diameter of 98 mm: 120 g of MoS2 greasing (VW G6) are distributed as follows: 80 g in the hinge and 40 g in a cuff.
  10. In the hinges which were in the use, greasing only is added.
  11. Strong clamp cuff clips.

Dismantle of the internal hinge

Gomokinetichesky hinges

1–lock ring;
2–internal gomokinetichesky hinge;
3–power shaft.


 PERFORMANCE ORDER

  1. Dismantle a power shaft.
  2. Having shown the patience, two narrow screw-drivers take out from a groove on the shaft end a safety ring which holds the hinge on a power shaft.
  3. Now remove the driving hinge from a shaft; as a last resort slightly help itself a plastic or aluminum hammer.
  4. If the hinge does not act in film in such a way, it needs to be wrung out from a shaft in a workshop by means of a repair press.
  5. At installation in the beginning put a cuff.
  6. In the version with a tarelchaty spring before installation of the hinge pull over a shaft a tarelchaty spring or check its arrangement: it should be convex to the hinge on external edge.
  7. Pull the hinge over a shaft, put a lock ring.
  8. In such a way the lock ring will not move in a groove. Therefore clamp a power shaft in a vice, put a big screw-driver or a pipe scrap to an internal part of the hinge and strongly strike with a hammer on a screw-driver.
  9. Counteracting force of a tarelchaty spring, the hinge will move a little back – the lock ring can drop in in a groove.
  10. Grease the hinge: in the new hinge with external diameter of 100 mm press 80 g of MoS2 greasing (VW G6), from them 30 g into the hinge and 50 g in a cuff.
  11. More greasing goes on the hinge with external diameter of 108 mm: 120 g of MoS2 greasing (VW G6) are distributed as follows: 35 g in the hinge and 85 g in a cuff.
  12. In the hinges which were in the use, greasing only add.
  13. Before hinge screwing up (or a cuff flange) grease with VW D3 hermetic a sealing surface between a flange of a cuff and the hinge.

Dismantle of the internal hinge

Tripod type hinges

The hinge of tripod type (1) does not act in film from a power shaft. In a different way business is with gomokinetichesky hinges, here is direct from a power shaft (3) the external hinge (2) and the internal hinge (4) act in film.


 PERFORMANCE ORDER

  1. Hinges of the tripod type do not act in film from a power shaft. They are on sale as the spare part assembled with shaft and a protective cuff. Therefore at replacement dismantle only the external hinge and replace a shaft with the internal hinge.
  2. If only the protective cuff трипода is defective, the external hinge of a shaft is dismantled. In this case the cuff can be advanced on the cleared power shaft to трипода. Critical position: the cuff needs to be raised carefully over a convex part in the middle of a shaft. For this purpose grease camber and raise a cuff over a thickening stupid round tools (the spoon handle).
  3. The hinge is filled 140 g of G 000 605 greasing. At cuff replacement in the hinges which were in the use, add greasing.