4.3.10. Check of a free wheeling (side play) of a steering wheel

At the increased free wheeling of a steering wheel driving as it with delay reacts to actions of the driver is at a loss. Besides, the increased course which does not manage to be eliminated with adjustment of the steering mechanism, testifies to malfunction of steering (weakening of fastening of the steering mechanism, steering drafts and the pendular lever or wear of their details).
You carry out an inspection of a side play of a steering wheel on the car installed on an equal nonslipping covering. The side play should not exceed 5 °. It is possible to determine a side play in linear units (mm) by a formula
L = (5 °/360 °) pD, where
L — a side play of a steering wheel, mm; p = 3,14;
D — the outer diameter of a steering wheel, mm.
For a steering wheel which outer diameter makes 400 mm the side play has to make no more than 18-20 mm.
It will be required to you: a ruler, swept (or a wire) for drawing tags.
1. Establish forward wheels in the situation corresponding to the rectilinear movement.
2. Establish a ruler so that its end face rested against the dashboard, the middle part concerned the lever of the switch of light of headlights (established in situation at which passing beam is turned on), and the plane of a ruler concerned an external surface of a rim of a steering wheel. Without changing the provision of a ruler, turn a steering wheel in any party until the beginning of turn of forward wheels. In this situation apply a tag on a rim of a steering wheel (fix a wire).
3. Without changing the provision of a ruler, turn a steering wheel in other party until the beginning of turn of forward wheels. In this situation apply the second tag on a rim of a steering wheel (fix a wire).
4. Measure on a rim distance between tags. It has to be no more calculated value. If the distance (a free wheeling of a steering wheel) is more, continue check of steering for definition of the reason of increase in a free wheeling.