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4-3-21-proverka-i-regulirovka-uglov-ustanovki-koles.html
4.3.21. Check and adjustment of corners of installation of wheelsCheck and adjustment of corners of installation of wheels are necessary for ensuring good stability and controllability of the car, and also uniform wear of tires at operation. Check and adjustment of corners of installation of wheels carry out at special stands according to instructions on their operation.
Adjustment of a corner of disorder and convergence of back wheels a design of the car is not provided. Discrepancy of the valid values measured on the car, to the control values specified below, is caused by wear and deformation of details of a suspension bracket or body deformation. At detection of deviations in the parameters of a back suspension bracket caused by deformation of its elements and a body, it is necessary to find the reason of emergence of deviations and to eliminate it with replacement of the failed details.
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Prevention
Replacement or repair of details of a suspension bracket can cause change of corners of installation of wheels therefore check of corners of installation of wheels is obligatory.
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Corners of installation of forward wheels:
corner of a longitudinal inclination of an axis of turn of a forward wheel..... 1°30 ’±30’
corner of disorder.....–30 ’±20’
convergence..... 0 ’±10’
Corners of installation of back wheels:
corner of disorder.....–1°30 ’±20’
convergence..... 10 ’±10’
Corners of installation of wheels check on the car without loading with the fuel tank filled half, normal pressure of air in tires and in the absence of excessive люфтов in suspension bracket knots.
After car installation on the stand (directly ahead of check of corners) «прожмите» a car suspension bracket, putting two-three times effort of 392-490 N (40–50 kgfs), directed from top to down, at first to a rear bumper, and then to the forward. Wheels of the car should be located parallel to a longitudinal axis of the car.
At check and adjustment of corners of installation of forward wheels at first check a corner of a longitudinal inclination of an axis of turn, then a corner of disorder of wheels and in the last turn a convergence of wheels.
The corner of a longitudinal inclination of an axis of turn of a forward wheel is educated by a vertical and the line passing through the middle of the top support of a telescopic rack and the center of the sphere of a spherical support, fixed on the bottom lever. Adjustment of a corner of a longitudinal inclination of an axis of turn is not provided by a car design. At a corner deviation from nominal rate replace the damaged and deformed details.
The corner of disorder of forward wheels is characterized by a deviation of the average plane of rotation of a wheel from a vertical.
The corner of disorder is regulated by moving of a rotary fist of rather amortizatorny rack, and also moving of a spherical support concerning the suspension bracket lever.
The convergence of forward wheels represents a corner between the plane of rotation of a wheel and a longitudinal axis of the car.
Convergence of forward wheels regulate change of length of steering drafts.
Check the following corners of installation of back wheels.
The corner of disorder of back wheels is characterized by a deviation of the average plane of rotation of a back wheel from a vertical. Adjustment of a corner of disorder of back wheels is not provided by a car design.
The convergence of back wheels represents a corner between the plane of rotation of a back wheel and a longitudinal axis of the car. Adjustment of a convergence of back wheels is not provided by a car design.
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