Audi A4, S4

since 2000 release

Repair and operation of the car

Audi A4, S4
+ Introduction
+ Governing bodies and methods of safe operation
+ Current leaving and service
+ Engine
+ Cooling systems, heating and air conditioner
+ Power supply systems, release and decrease in toxicity of the fulfilled gases
+ Systems of electric equipment of the engine
+ Manual box of gear shifting
+ Automatic transmission
+ Coupling, power shafts and differential
+ Brake system
- Suspension bracket and steering
   Security measures at work
   - Suspension bracket of forward wheels
      General information
      Removal and installation of a depreciation rack
      Removal and installation shock-absorber/dismantling of a depreciation rack
   + Suspension bracket of back wheels
   + Corners of installation of wheels of the car
   + Steering and safety cushions
+ Body
+ Onboard electric equipment

Suspension bracket of forward wheels

General information

Suspension bracket of forward wheels


1 — the Support 2 — Amortizatsionaya is resistant 3 — the Console 4 — the Beam of the power unit 5 — the Stabilizer of cross stability 6 — the Power shaft 7 — the Tripode Hinge 8 — the Back lever	9 — Steering draft 10 — the Forward lever 11 — the Rotary support 12 — Gidroopora 13 — the Directing lever 14 — the Connecting bar 15 — the Bearing lever

Elements of a suspension bracket of forward wheels

1 — the Bolt, 75nm
2 — the Washer
3 — the Bolt. Surely replace
4 — the suspension bracket Lever top back. Replace a support
5 — the Bolt, 7nm
6 — the Bolt
7 — the Self-stopped nut, 50nm, surely replace
8 — the Bolt
9 — the Self-stopped nut, 40nm, surely replace
10 — the suspension bracket Lever top forward. Can act only together with a support
11 — Amortizatsionaya is resistant
12 — the Bolt. Surely replace
13 — the Directing lever with a hydrosupport. If on a hydrosupport there is considerable leak of oil, the support needs to be replaced
14 — the Nut, 120nm, self-stopped. Surely replace
15 — the wheel bearing Case
16 — the Bolt with a fillet, surely replace. Inhaling moment:
M14 bolt: 115nm and then tighten on 180 °;
M16 bolt: 190nm and then tighten on 180 °;
17 — the Bolt, 10nm
18 — the Cover
19 — the Nut, 90nm, self-stopped. Surely replace
20 — the Bolt
21 — the Support of a beam of the power unit
22 — the Bolt, 55nm
23 — the Bolt, 110nm and then tighten on 90 °. Surely replace
24 — the Bolt, 40nm and then tighten on 90 °. Surely replace
25 — the Rod
26 — the Bolt, 40nm and then tighten on 90 °. Surely replace
27 — the Bearing lever lower
28 — the Bolt. Surely replace
29 — the Bolt, 75nm. Surely replace
30 — the Beam of the power unit. Attention: Do not lift the car for a beam of the power unit
31 — the Nut, 70nm and then tighten on 180 °. Surely replace
32 — the Nut, 70nm and then tighten on 180 °. Surely replace
33 — the Screw with an internal polyhedron. Previously tighten the moment 15nm, then the next moment:
M8 screw = 40nm
M10 screw = 70nm
34 — Podkladnaya a plate
35 — the Power shaft
36 — the Bolt. Surely replace
37 — the Nut, 50nm and then tighten on 90 °. Surely replace
38 — the Nut with a fillet, 50nm. Surely replace

The four-lever, independent suspension bracket of forward wheels has depreciation racks of McPherson and the torsion stabilizer of cross stability.

Depreciation 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 the direction of wheels, and through connecting bars is connected with depreciation racks.

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

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

The torque transmission of the power unit on wheels is carried out through two power shafts, each of which, via two hinges of equal angular speeds, is connected with wheels and the main transfer.