4.3.18. Free wheeling check (люфта) 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 adjustment of the steering mechanism, testifies to malfunction of a steering (easing of fastening of the steering mechanism, steering draughts or deterioration of their details).

Check люфт a steering wheel on the car established on an equal nonslipping covering. Люфт should not exceed 5 . It is possible to define люфт and in linear units (mm) under formula L = (5 /360 ) pD, where

L — люфт a steering wheel, mm;

p = 3,14;

D — external diameter of a steering wheel, mm.

For a steering wheel which external diameter makes 380 mm, люфт should not exceed 16–18 mm.

It be required to you: a ruler, a chalk (or a wire) for drawing of labels.

1. Establish forward wheels in the position corresponding to rectilinear movement of the car.

2. Establish a ruler so that its end face rested against the panel of devices, and the ruler plane concerned an external surface of a rim of a steering wheel. Without changing ruler position, turn a steering wheel to the left till the moment of the beginning of turn of forward wheels. In this position put on a rim of a steering wheel a label (fix a wire).	3. Without changing ruler position, turn a steering wheel to the right till the moment of the beginning of turn of forward wheels.

4. In this position put on a steering wheel rim the second label (fix a wire).

5. Measure on a rim distance between labels. It should be no more the calculated value. If the distance (a steering wheel free wheeling) more, is necessary to establish the reason and to eliminate it.