Preliminary check
1. Check tire wear and pressure.
2. Check the runout of the road wheels.
3. Check the end play in the wheel bearings.
4. Check the end play in the lower ball joints of the suspension.
5. Check up work of shock-absorbers of racks.
6. Check that the axle and suspension mounting points are tight and not deformed.
7. Check up, whether there are no cracks, deformations and other damages on drafts and levers.
8. Check the height of the unladen vehicle.
Checking the camber angles, longitudinal and transverse inclination of the axis of rotation of the wheels
The collapse, the angles of the longitudinal and transverse inclination of the axis of rotation are not subject to adjustment.
Front wheel alignment can be checked accurately and quickly using the Express Gauge.
For more information on how to perform a quick test, see the Quick Gauge Instruction Manual.
Before checking, roll the car with the front wheels on a gauge to measure the angle of rotation. Place a stand of the same height under the rear wheels so that the vehicle is in a horizontal position.
Checking with the express gauge
When using the express gauge, the roll axis cannot be measured.
Install the express gauge vertically, with the arrow on the sticker pointing upwards, as shown in the figure.
- Camber: -0°14'±45'
- Pitch Angle: 1°54'±45'
Note: A caster angle of 2.865 measured with the express gauge is considered normal.
Checking with a camber, caster and roll gauge (SSC)
1. Remove the wheel trim or hub cap and unscrew the wheel nuts (3 pcs.). Screw on the guide bolt (special tool) on the hub bolt as shown.
2. Screw the adapter (special tool) before touching the plate (special tool).
3. Screw in the center plate (special tool) into the record (special tool).
4. Insert guide bolt (special tool) into the record (special tool), insert the spring and evenly tighten the nut on the guide bolt (special tool). Tighten until the spring is fully compressed.
5. Align the convex part of the center plate with the concave part of the SSK gauge and measure.
- Camber: -0°14'+45'
- Pitch Angle: 1°54'±45'
- Pivot Angle: 14°04'±45'
If the camber, caster and roll angles are abnormal, check the front suspension components. Replace damaged or worn parts.
Wheel alignment check
1. Place the express gauge on a flat surface using the feet and bring the level bubble to the 0 mark.
2. Move the caliber forward (in the direction of the arrow on the sticker) on the tested wheel.
3. Remove the 1 wheel nut on the rear wheel closest to the centerline and install the adapter onto the hub stud.
4. Install the connecting rod on the vehicle between the wheels at the same height front and rear (distances A and B are the same).
5. Remove the express gauge from the vehicle, measure on a flat surface, and convert the value obtained using the following formula.
Sin ([received value] * [decimal]) x tire diameter (mm) = convergence (mm)
*: The resulting value is the sum of the left and right wheels.
Calculation example:
Received value 0°30' (0,5°) with a diameter of 600 mm
Sin 0.5x600=5.2mm
Convergence: 1-3 mm
6. If the toe-in is out of specification, loosen the tie rod locknuts and adjust the length until the desired toe-in angle is obtained.
Note:
Adjust the toe of the right and left wheels by rotating the steering rods by the same number of revolutions.
Tighten the tie rod lock nuts with a wrench.
Wheel slip check
Using the stand, check if the lateral slippage of the wheels is normal.
Depending on the wear of the tread pattern, the side slip of the wheels can be different even at the same wheel alignment angles.
Standard side slip:
- Inside: 5mm
- Out: 5 mm
Note:
Before checking wheel slip, perform a wheel alignment check.
Check that the toe-in is correct, if the side slip is normal.