Checking and adjusting the front wheel alignment angles (VAZ-2101)

These works are performed on special stands. Wheel alignment angles must be checked after replacement or repair of suspension parts that affect these angles.

For a new car (before TO-1) the wheel alignment angles have the following values: camber 0°30'^+40'_-30'; longitudinal angle of inclination of the axis of rotation 4°^+1°_-1°30' toe-in 1-7 mm.

After carrying out TO-1 (after 2000-3000 km of mileage) and during further operation of the vehicle, the wheel alignment angles should be: camber 0°30'±20' (0°5'±20')* longitudinal angle of inclination of the steering axis 4°±30' (3°30' ±30')¹; toe-in 2-4 mi (3-5 mm)¹.

The difference in the longitudinal angles of inclination of the steering axes of the right and left wheels must not exceed 0°30'.

Before adjusting the wheel alignment angles, check the tire pressure, the clearance in the front wheel hub bearings, and the serviceability of the shock absorbers (for absence of rod jamming), radial and axial runout of tires, clearance in the upper ball joints of the suspension, free play of the steering wheel. The detected faults are eliminated by adjusting or repairing the specified units.

Wheel alignment can be checked and adjusted both on a loaded vehicle and on an unloaded vehicle, but checking the angles on an unloaded vehicle gives less accurate results. Therefore, in critical cases, it is recommended to check and adjust the angles on a vehicle under a static load of 320 kgf, which corresponds approximately to the weight of 4 people and a load of 40 kg in the trunk.



The car is loaded with special weights that are suspended from the bottom of the body, or ballast (280 kg), distributed on the seat cushions and in the trunk (40 kg). The front seats should be in the middle position of their longitudinal travel. The load in the trunk is distributed evenly, and the lack of gasoline is compensated for by a load located on the right side of the trunk platform.

After installing the car on the stand, immediately before checking the corners, the car's suspension is "squeezed" by applying a force of 40-50 kgf 2-3 times, directed from top to bottom, first on the rear and then on the front bumper. The car's wheels should be pointed straight ahead.

The following order of checking and adjusting the wheel alignment angles is observed: longitudinal tilt angle of the steering axis, camber angle, and wheel toe-in.

Angle of longitudinal inclination of the axis of rotation

If, when checking, this angle does not correspond to the data given above, the number of adjusting washers installed between the axis of the lower arm and the cross member is changed and (see fig. 100), following Table 15. When adjusting the wheel alignment angles, it is permissible to use U-shaped adjusting linings, which must be directed with the slot downwards. After adjustment, tighten the nuts with a torque wrench and check the angle value again.

Front wheel camber angle

If the camber differs from the norm, it is also adjusted by changing the number of adjusting washers 27 and 25, using Table 15. To increase the camber angle, remove the same number of washers from both bolts, and to decrease it, add more.

Front wheel alignment

If the wheels are not aligned correctly, loosen the side rod clamps and use key 67.7813.9504 to turn both couplings 5 (see fig. 124) by the same amount in opposite directions. In this case, the couplings are screwed or rolled up with the rod end and change the length of the side rods. After completing the adjustment, the clamping clamps are installed with the slot horizontally with an upward or downward deviation of no more than 600 and tightened in this position. When the nuts are tightened, the edges of the slots of the clamping clamps should not touch.

Key 67.7813.9504 is made similar to a pipe wrench and can be replaced with it.



Checking and adjusting the clearance in the front wheel hub bearings. Raise the front of the vehicle and remove the wheels. Carefully remove the hub cap using puller 67.7801.9514 or a screwdriver. Install device 02.7834.9505 under the wheel mounting bolt (2, Fig. 104). The indicator leg 1 is placed against the end face of the steering knuckle axis with the pointer in the zero position and, moving the hub 3 along the steering knuckle axis, the amount of movement (gap) is measured using the indicator. If the gap is greater than 0.15 mm, it is adjusted in the following order:

• unscrew the adjusting nut from the steering knuckle journal;
• install a new or used nut, but on a different car, and tighten it to a torque of 2 kgf·m, while simultaneously turning the hub in both directions 2-3 times to self-install the bearings (if you use a nut that has been removed from the adjustable unit, it is difficult to ensure that it locks securely);
• loosen the adjusting nut and tighten it again with a torque of 0.7 kgf·m, then loosen it by 20-25° and lock it by pressing the holes on the nut neck into the grooves on the end of the pivot pin axis. After adjustment, the clearance in the bearing should be within 0.02-0.08 mm. When adjusting the clearance, it should be taken into account that the direction of the thread on the left pivot is right, on the right - left.

Notes

1. The data in brackets is for a vehicle without load.