Actuator overpressurising assembly

An actuator pressure intensifying assembly comprising:

• a gear motor assembly;
• a mode valve arranged to receive, at an input port, a supply pressure and to provide, at an output port, a control pressure to an actuator;
• the mode valve further configured to move, in response to the supply pressure exceeding a predetermined activation threshold, from a first mode in which the supply pressure flows directly from the input port to the output port in a first fluid flow path, and a second mode in which the supply pressure flows from the input port to the output port in a second fluid flow path which includes the gear motor assembly between the input port and the output port which intensifies the supply pressure such that the control pressure is higher than the supply pressure;
• wherein the mode valve comprises:
• a valve body, wherein the valve body defines the input port and the output port and further defines one or more second mode outlet ports;
• a spool arranged for axial movement within the valve body;
• wherein the mode valve is arranged such that in the first mode, the spool is arranged to provide a flow path between the input port and the output port and to block the second mode output ports, and in the second mode, to provide a flow path from the input port to a at least one of the one or more second mode outlet ports connected to the gear motor assembly and to block the output port;
• and
• a spring at each end of the spool, the springs selected such that in the first mode, the spool body is positioned, by the springs, to create the flow path between the input port and the output port, and when a pressure applied at the input port exceeds a threshold pressure, the spool body is moved against the force of the springs to create the flow path from the input port to the at least one of the one or more second mode outlet ports.