The main characteristics are determined for the vehicle in which it is assembled, the pressure the circuit normally works and the functions that have as origin from the steering There are a few types, the most common are:
This application is general to the industrial vehicle (bus, lorry or special vehicle) having an hydraulic steering functioning. The main brands are ZF and TRV. For example: MAN, DAF, RVI, MB, IVECO, PEGASO, SCANIA, NISSAN…
It doesn´t need a specific maintenance, you only have to make sure that the circuit does not have a leak and losing oil, and every time it is repaired, the circuit must be cleaned to get the shavings out, that way, it won´t damage the new installed devices.