VEHICLE SUSPENSION SYSTEM

A vehicle suspension system comprising at least one suspension bellows, a source of pressurised fluid, a supply line which extends between the suspension bellows and the source of pressurised fluid via a raise/lower valve, and a manually operable operating member which is movable between a raise position, a lower position and a drive position, the operating member being connected to the raise/lower valve which is configured such that when the operating member is moved to the raise position, the raise/lower valve moves to a raise position in which the suspension bellows are directly connected to the or a further source of pressurised fluid, when the operating member is moved to the lower position, the raiser/lower valve moves to a lower position in which suspension bellows are vented to a low pressure region, and when the operating member is moved to the drive position, the raise/lower valve moves to a drive position in which the suspension bellows are connected to the or the further source of pressurised fluid via an electrically operated suspension valve assembly, wherein the raise/lower valve is further provided with a fluid pressure operated actuator which moves the raise/lower valve to the drive position when pressurised fluid is supplied to the actuator, and a pilot pressure line by means of which pressurised fluid is supplied to the actuator.