Audi A4, S4

Since 2000 of release

Repair and car operation



Audi A4, S4
+ Introduction
+ Controls and receptions of safe operation
+ Current leaving and service
+ The engine
+ Systems of cooling, heating and the air conditioner
+ Power supply systems, release and decrease in toxicity of the fulfilled gases
+ Systems of an electric equipment of the engine
+ Manual box of a gear change
+ Automatic transmission
+ Coupling, power shafts and differential
+ Brake system
- Suspension bracket and steering
   Security measures at work
   - Suspension bracket of forward wheels
      The general data
      Removal and installation of an amortisation rack
      Removal and installation of the shock-absorber/dismantling of an amortisation rack
   + Suspension bracket of back wheels
   + Corners of installation of wheels of the car
   + Steering and safety pillows
+ Body
+ Onboard electric equipment



Suspension bracket of forward wheels

The general data

Suspension bracket of forward wheels

1 — the Support
2 — Amortizatsionaja a rack
3 — the Console
4 — the Beam of the power unit
5 — the Stabilizer of cross-section stability
6 — the Power shaft
7 — Hinge "Tripode"
8 — the Back lever

9 — Steering draught
10 — the Forward lever
11 — the Rotary support
12 — the Hydrosupport
13 — the Directing lever
14 — the Connecting bar
15 — the Bearing lever

Elements of a suspension bracket of forward wheels

1 — the Bolt, 75Нм
2 — the Washer
3 — the Bolt. Necessarily replace
4 — the suspension bracket Lever top back. A support replace
5 — the Bolt, 7Нм
6 — the Bolt
7 — the Self-stopped nut, 50Нм, necessarily replace
8 — the Bolt
9 — the Self-stopped nut, 40Нм, necessarily replace
10 — the suspension bracket Lever top forward. Can act in film only together with a support
11 — Amortizatsionaja a rack
12 — the Bolt. Necessarily replace
13 — the Directing lever with a hydrosupport. If on a hydrosupport there are considerable leaks of oil, it is necessary to replace a support
14 — the Nut, 120Нм, self-stopped. Necessarily replace
15 — the Case of the bearing of a wheel
16 — the Bolt with a fillet, necessarily replace. The inhaling moment:
Bolt М14: 115Нм and then tighten on 180 ;
Bolt М16: 190Нм and then tighten on 180 ;
17 — the Bolt, 10Нм
18 — the Cover
19 — the Nut, 90Нм, self-stopped. Necessarily replace
20 — the Bolt

21 — the Support of a beam of the power unit
22 — the Bolt, 55Нм
23 — the Bolt, 110Нм and then tighten on 90 . Necessarily replace
24 — the Bolt, 40Нм and then tighten on 90 . Necessarily replace
25 — the Rod
26 — the Bolt, 40Нм and then tighten on 90 . Necessarily replace
27 — the Bearing lever bottom
28 — the Bolt. Necessarily replace
29 — the Bolt, 75Нм. Necessarily replace
30 — the Beam of the power unit. Attention: do not lift the car for a beam of the power unit
31 — the Nut, 70Нм and then tighten on 180 . Necessarily replace
32 — the Nut, 70Нм and then tighten on 180 . Necessarily replace
33 — the Screw with an internal polyhedron. Preliminary tighten the moment 15Нм, then a following moment:
Screw M8 = 40Нм
Screw M10 = 70Нм
34 — Podkladnaja a plate
35 — the Power shaft
36 — the Bolt. Necessarily replace
37 — the Nut, 50Нм and then tighten on 90 . Necessarily replace
38 — the Nut with a fillet, 50Нм. Necessarily replace

Четырёхрычажная, the independent suspension bracket of forward wheels has amortisation racks McPherson and торсионный the stabilizer of cross-section stability.

Amortisation racks consist of cylindrical screw springs, shock-absorbers in the form of a double pipe and the top support of the big size. The stabilizer does not participate in a direction of wheels, and through connecting bars is connected with amortisation racks.

The amortisation rack is fixed by bolts to a support of the top lever and to the forward cross-section lever.

Optimum running characteristics and the minimum deterioration of tyres it is reached only in that case when wheels occupy correct position. At wrong deterioration of tyres, and also at insufficient stability on road it is necessary to make optical measurements and, if necessary, to adjust corners of installation of wheels.

Transfer of a twisting moment of the power unit on wheels is carried out through two power shafts, each of which, through two hinges of equal angular speeds, connected with wheels and the main transfer.