Attention! Checking the wheel alignment is mandatory if you are replacing or repairing suspension parts that may result in a change in wheel alignment.
At the new car (before the first maintenance) wheel alignment angles have the following meanings:
collapse | 0°30’+40’–30’ |
Longitudinal angle of inclination of the axis of rotation | 4°+1°–1°30’ |
Convergence | 1–7 mm |
After the first maintenance (after 1500–2000 km of run) and during the further operation of the car, the value of the wheel alignment angles should be:
collapse | 0° 30’ ± 20’ (0° 5’ ± 20’) |
Longitudinal angle of inclination of the axis of rotation | 4° ± 30’ (3° 30’ ± 30’) |
Convergence | 2 - 4 mm (3 - 5 mm) * |
* In parentheses are the values of the angles without load, without brackets - with load.
The difference in the longitudinal angles of inclination of the axes of rotation of the right and left wheels should not exceed 0°30'.
Before wheel alignment check:
- air pressure in tires;
- axial clearance in the bearings of the front wheel hubs;
- shock absorber serviceability (no stem jamming);
- radial and axial runout of tires;
- clearance in the upper ball joints of the suspension;
- steering wheel free play.
Eliminate the detected malfunctions and make the necessary adjustments.
The control and adjustment of the wheel alignment angles can be carried out both on a loaded vehicle and on an unladen one, however, the control of the angles on a loaded vehicle gives more accurate results. Therefore, in critical cases, it is recommended to carry out control and installation of corners on the car under a static load of 3136 N (320 kgf), which corresponds to approximately the weight of four people and a load of 40 kg in the trunk.
The car is loaded either with special loads suspended from the bottom of the body, or with ballast (280 kg), placed on the seat cushions and in the trunk (40 kg). The front seats must be in the middle position of their longitudinal travel. The load in the trunk is evenly distributed. The lack of fuel is compensated by the cargo located on the right side of the trunk area.
After placing the car on the stand just before the corner control "press" car suspension, applying 2–3 times a force of 392–490 N (40–50 kgf), directed from top to bottom, first on the rear, and then on the front bumper. In this case, the wheels of the car must be parallel to the longitudinal axis of the car.
The sequence of checking and adjusting the wheel alignment angles is as follows:
- angle of longitudinal inclination of the axis of rotation;
- collapse angle;
- convergence.
Changing the camber angle and longitudinal inclination of the axis of rotation of the wheel when changing the number of washers in packages
Number of pucks added to or removed from the bag | Camber | Longitudinal angle of inclination of the axis of rotation of the wheel | |||
front bolt | rear bolt | washers thickness, mm | |||
0,5 | 0,8 | 0,5 | 0,8 | ||
+1 | +1 | – (7'–9') | – (11'–14') | 0 | 0 |
–1 | –1 | + (7'–9') | + (11'–14') | 0 | 0 |
+1 | 0 | 0 | 0 | – (18'–20') | – (29'–32') |
–1 | 0 | 0 | 0 | + (18'–20') | + (29'–32') |
0 | +1 | – (7'–9') | – (11'–14') | + (18'–20') | + (29'–32') |
0 | –1 | + (7'–9') | + (11'–14') | – (18'–20') | – (29'–32') |
–1 | +1 | – (7'–9') | + (11'–14') | + (36'–40') | + (52'–64') |
+1 | –1 | + (7'–9') | – (11'–14') | – (36'–40') | – (52'–64') |
Angle of longitudinal inclination of the axis of rotation
1. If, when checking, the angle does not correspond to the data given above, change the number of shims 27 and 28 (see fig. Front suspension), installed between the axis of the lower arm and the cross member.
2. To adjust the caster angle of the steering axle, loosen the nuts securing the arm axle to the cross member and change the number of shims under the bolts to obtain the correct caster angle of the steering axle (see table. Changing the camber angle and longitudinal inclination of the axis of rotation of the wheel when changing the number of washers in packages).
3. Tighten the nuts with a torque wrench and check the caster angle.
Attention! When adjusting the angles of the front wheels, it is allowed to use U-shaped shims, which must be installed with the slot down.
Front camber angle
If the camber angle is out of specification, adjust it by changing the number of shims 27 and 28 (see fig. Front suspension), installed between the axis of the lever and the crossbar (see table. Changing the camber angle and longitudinal inclination of the axis of rotation of the wheel when changing the number of washers in packages). To increase the camber angle, remove the same number of washers from both bolts, and to decrease, add.
Front wheel alignment
1. If the convergence value differs from the norm, loosen the tie-down collars of the side rods and with the key 67.7853.9504 turn both couplings by the same amount in opposite directions; in this way, the couplings are screwed on or unscrewed and change the length of the side rods.
2. After completing the adjustment, install the tie-down collars with a slot horizontally with a deviation up or down no more than 600 and tighten them in this position. When the nuts are tightened, the edges of the slots of the clamping collars must not touch.