"TOP DRIVE SYSTEM“ integrative air spring system may be supplied in three different versions, according to user preference.

For commercial vehicles only the manually inflated version is available, since experimental trials have led to the conclusion that the auto-level system does not provide sufficient advantages in relation to cost.

This type of system is very simple to apply.

After installation, the user inflates the two sections of the system (right and left) with a normal tyre inflating gun.

A standard pressure is recommended to start with, but the user must then make minor adjustments to ensure that the system will perform optimally according to his needs.

Therefore, the initial period of use will be useful for the purpose of fine-tuning the system.

Adjustments are made easier thanks to the possibility of installing the pressure gauges in the cab, which means that pressure readings can be taken at any time (pressure gauges with backlighting are available as an optional feature to ensure visibility in the absence of other light sources).

For medium-sized and heavy vehicles (equipped with their own pneumatic system), three different versions of the suspension system are available. They are distinguished by the type of inflation used, i.e.:

manual, electric or auto-levelling.

• Manual inflation: the method is similar to the one described above for lightweight vehicles, except that adjustments can be made at any time using a three-position control lever located in the cab (it is recommended to avoid large pressure adjustments while the vehicle is moving)

• Electric inflation: similar to manual inflation, but in this case the system is controlled via a solenoid valve. Adjustments can be made at any time, as with manual inflation (in this case as well, it is recommended to avoid large pressure adjustments while the vehicle is moving)

• Self-levelling inflation: the system is autonomous. After the initial inflation, pressure is automatically regulated as the vehicle travels. Adjustments are made by special valves that adapt the pressure according to the type of road surface and how the vehicle is handled. The system is strongly recommended for applications on the front axle, since it significantly increases the driver’s comfort.