Agricultural implement having arms movable to headland positions

An agricultural implement comprising:

• an elongated main chassis member, a secondary chassis member, a cross beam and a hydraulic cylinder operating between a mounting point provided on the secondary chassis member and a drive;
• ground engaging wheels for supporting the main chassis member on the ground;
• and
• front and rear sets of arms carried from the elongated main chassis member, each set comprising an arm to each side of the main chassis member, each arm comprising at least one working implement including a hub and each arm pivotably connected to the main chassis member and adapted to move between a working position, a headland position and a transport position, the arms to each side of the elongated main chassis member forming a pair having a rear working implement and a forward working implement, each of the rear arms further comprising a major portion and a depending portion, a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod, wherein:
• the major portion is hingedly connected at a first end to a lower side of the secondary chassis member at a first pivot point and a second end of the major portion is hingedly connected to a first end of the depending portion;
• a second end of the depending portion is hingedly connected to the hub of the rear working implement;
• the first connecting rod is pivotally connected at a first end to a central part of the depending portion and connected at a second end to a connecting pivot pin arrangement;
• the second connecting rod is connected at a first end towards the second end of the major portion and pivotally connected at a second end to the hub;
• the third connecting rod is connected between a free end of the cross beam and the connecting pivot point arrangement,
• the fourth connecting rod is connected at a lower first end to the connecting pivot pin arrangement and at a upper second end to the drive driven by the hydraulic cylinder;
• the forward working implement being located laterally further from the elongated main chassis member in the working position than the rear working implement, and when moving from the working position to the headland position the hydraulic cylinder is operated to pull down the first end of the fourth connecting rod to displace the lower end of the fourth connecting rod outwards, causing the first connecting rod to cause the depending portion to pivot with respect to the main chassis member so as to displace the rear working implement along its arm, such that when in the headland position the rear working implement of at least one of the pairs of arms is displaced laterally away from the main chassis member.