A carrier assembly for an operating unit of an agricultural machine includes a carrier arm, a suspension system for suspending an operating unit from the carrier arm and a mounting structure for mounting the carrier arm on a carrier vehicle. A pivot mechanism enables pivoting movement of the carrier arm relative to the mounting structure, and a first actuator drives pivoting movement of the carrier arm between a working position and a transport position. The carrier arm includes an inner part and an outer part that can be telescopically extended and retracted relative to the inner part, and a second actuator that drives the outer part to adjust the length of the carrier arm. The first actuator is connected between a first mount that is attached to the mounting structure and a second mount that is attached to the inner part of the arm, and the second actuator is connected between the second mount and a third mount that is attached to the outer part of the arm.
