Table of contents: 10.5.1. Longitudinal inclination of…🠇 10.5.2. Collapse 🠇 10.5.3. Front wheel alignment 🠇
Adjustment of the front wheels is carried out with the vehicle under operational load, that is, the vehicle must be unloaded and filled with fuel, oil and water.
10.5.1. Longitudinal inclination of the kingpin
The longitudinal inclination angle of the kingpin is adjusted by installing 2.5 mm thick washers on the brace in the place shown in Figure 130. From one to three washers can be installed in this place. It should be taken into account that over the years of vehicle production, the specified value of the longitudinal inclination angle of the kingpin has changed. The exact values are contained in the tables of adjustments and sizes.
Figure 130. One to three 2.5 mm thick washers can be installed in the place indicated by the arrow to adjust the longitudinal inclination angle of the kingpin.
The angle can be measured with a conventional measuring instrument according to the manufacturer's instructions.
If the measured values differ from the specified ones, it can be assumed that the front suspension is tilted. In this case, testing on an optical bench is required, since this is the only way to establish accurate values.
When performing the work yourself, keep in mind that the rear strut nut is tightened to a torque of 140 Nm, while the front nut is tightened to a torque of only 100 Nm. Removal and installation of the strut are described in the section "Front axle and front suspension".
10.5.2. Collapse
The camber angle is measured with a conventional measuring instrument in accordance with the instrument manufacturer's instructions. There should be no camber between both wheels; differ by more than 30'. Camber is not adjustable. If the measured values differ from the specified ones, it can be assumed that the front suspension is tilted. In this case, testing on an optical bench is required, since this is the only way to establish accurate values.
10.5.3. Front wheel alignment
Front wheel toe can be measured with a mechanical toe gauge. The wheels must have a positive toe-in of 0.5 +/- 1.0 mm, i.e. the front sides of the wheels must be closer to each other than the rear sides. The measurement is carried out as follows:
- Check and, if necessary, adjust the tire pressure.
- Place the vehicle on a level surface and set the wheels to point straight ahead. This can be done using the spokes of the steering wheel. If you are not completely sure that the center position of the steering wheel corresponds to the position of the wheels when driving straight ahead, you can set the rack to the position shown in Figure 126 and set the "X" dimension to 76.0 mm.
- Place the measuring rod on the front side of the wheels and place both measuring pins on the edges of the rims, setting the rod scale to zero. This is done at the level of the wheel hubs.
- Mark the contact points of the measuring pins with chalk.
- Remove the measuring rod.
- Move the car forward by half a turn of the wheels, that is, both chalk marks should be on the rear side of the wheels at the level of their hubs.
- Place the measuring rod under the vehicle and attach the measuring pins to the rims. If the wheels have positive toe-in, the pins should be pulled out of the rack.
- Place the pins and read the scale readings. The size should be 0.5 mm larger or at least within the tolerance of ±1.0 mm.
- If this is not the case, loosen the lock nuts on both tie rods at the outer ball joints and change the length of the tie rods to the same value. Change the length in small portions and measure the toe-in each time. It should be taken into account that the visible section of the thread between the steering tip and the nut on both sides should be the same (with an accuracy of approximately 2.0 mm).
- Finally, tighten both locknuts to a torque of 60 Nm. While doing this, hold the steering rods from turning. To prevent the cuffs from twisting when turning the steering rods, you need to release their fastening from the outside.
Original publication on the website [PeugeotBook]
