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12.7.11. Angles of installation of forward wheels (geometry of a forward suspension bracket and steering drive)

For check and adjustment of geometry of a forward suspension bracket special knowledge and the equipment are required.

The only, lying within qualification average amateur mechanic, check of convergence of forward wheels is. Authors of this manual recommend to address for performance of the adjustments described below to address specialists of dealer office of the company manufacturer of the car.

Before starting performance of adjustments carefully check a condition of components of the steering drive, and installation of a pretightness of stupichny bearings. Estimate a condition of spherical hinges, springs and fixture of a suspension bracket. Execute necessary repair.

Check protectors of tires of forward wheels for existence of signs of uneven wear as on the nature of wear often allows to draw quite certain conclusions on a condition of components of a running gear of the car (see the Section devoted to diagnostics of malfunctions of wheels at the beginning of the Management). Replace defective and worn-out tires.

During check performance the car has to be completely unloaded that means existence in a tank of normal amount of fuel. Pressure of a rating of tires has to meet standards (see size tables and adjustments at the end of the Management).

Corners of cross and longitudinal inclinations of an axis of turn of a wheel

Corners cross and longitudinal (выбег) inclinations of an axis of turn of a wheel are exposed at manufacturer and are not subject to adjustment. Any changes of these parameters speak about wear or damage of components of a suspension bracket.

Disorder

The disorder corner is also established on production and is not subject to adjustment. Any its changes should be regarded as a sign of wear or damage of components of a suspension bracket.

Some workshops specializing in adjustment of geometry of a suspension bracket of all-wheel drive cars undertake performance of correction of corners of inclinations of an axis of turn of wheels and disorder by installation of adjusting washers, eccentric bearings or special wedges. Authors of this manual recommend before starting replacement of components of a running gear to consult at experts of one of such workshops.

Convergence

Check and adjustment

 PERFORMANCE ORDER

  1. Park the car on the flat horizontal platform. A car front also establish to Poddomkratta it on props.
  2. Serially rotating both forward wheels, draw chalk a line on a protector of their tires, it is desirable as it is possible closer to the center.
  3. Lower the car on the earth and establish wheels in rectilinear situation.
  4. Draw chalk the central lines of both wheels approximately in 20 ÷ 25 cm above the ground ahead of a suspension bracket nave.
  5. Get between wheels at the level of tags the measured bar suitable on length. Write down distance of tires at the level of the central tags between centers.
  6. Holding wheels in rectilinear situation, give a ride to the car forward so that the tags which are carried out earlier appeared at the height of 20 ÷ of 25 cm above the ground again, but this time behind naves of wheels.
  7. Repeat measurement distance of tires at the level of tags between centers.
  8. The result of the first measurement has to differ from the second at a size stipulated by norms (see size tables and adjustments at the end of the Management).
  9. In case of need adjustments weaken collars of both tips of connecting steering draft.
  10. Adjust convergence by rotation of a pipe of a bar of draft.
  11. Tighten collars of tips, without changing the provision of a pipe of a bar.
  12. Repeat the procedure of check of convergence.