598999 Disclosed is a vehicle mounted fence post driver providing improved power, manoeuvring and alignment capabilities. The post driver comprises a frame, the frame comprising attachment means for mounting the post driver a mast supported by the frame and adapted to allow a weighted member to travel up and down at least one tilt mechanism configured to rotate the post driver and/or mast in a lateral direction. At least one of the tilt mechanisms comprises at least two independently operable hydraulically operated legs configured such that at least one leg is extendable and/or at least one other leg is retractable so as to tilt the post driver. Positioning means enables the position of the mast to be optimised and adapted for alignment with a post to be driven, and comprises a side shift configured to move the mast in a lateral direction. The mast is provided on an opposite side of the frame to the attachment means. The frame comprises a laterally extending mast support member, and the mast comprises or is mounted on a mast carriage, the mast carriage being slidable or 25 movable on the support member.
