Cutter device for an agricultural harvester

A cutter device for an agricultural harvester, comprising:

• a. a rotor with a plurality of tines, wherein the rotor is rotatable to transfer an agricultural crop along a feed path,
• b. at least one knife that is adjustable between (i) a cutting position in the feed path in which it cooperates with the rotor to cut the crop, and (ii) a non-cutting position in which it is withdrawn from the feed path, wherein the at least one knife is pivotable about a pivot axis located towards a front part of the knife, and
• c. a positioning device that controls movement of the knife between the cutting position and the non-cutting position, wherein the positioning device is adjustable between (i) a first position in which it positions the knife in the cutting position, (ii) a second position in which it positions the knife in the non-cutting position, and (iii) a third position in which it is disengaged from the knife to allow movement of the knife independently of the positioning device, wherein the positioning device is configured to engage the knife and prevent significant movement of the knife independently of the positioning device when the positioning device is in the first position and at intermediate positions between the first position and the second position.