A haymaking machine has a rake rotor with frame and support arm provided with a base part and a sliding part. The base part is pivotably connected to the frame about a support arm axis to enable the support arm to pivot between a lowered active position and a raised passive position. The sliding part is slidable relative to the base part between an inner position and an outer position for length adjustment of the support arm. The outer position is farther removed from the support arm axis than the inner position. A catching element is connected to the sliding part. A linear drive is connected to frame and sliding part to move the sliding part into the inner position and pivot the support arm from active position into passive position. A retaining mechanism holds the support arm in active position until the sliding part has reached the inner position.

A system includes an agricultural raking vehicle, including a motor drive and raking members mechanically coupled to the motor drive. The raking members rake agricultural product via rotation about an axis substantially orthogonal to a field on which the agricultural vehicle travels. The system also includes a sensor assembly that outputs a signal indicative of a determined windrow quality of the agricultural product raked by the raking members. The system also includes a controller communicatively coupled to the motor drive and to the sensor assembly. The controller receives the signal and controls an angular speed of the motor drive, a ground speed of the agricultural vehicle, and/or a height of the raking members or tines above the field, based on a comparison of the determined windrow quality to a target windrow quality.

A haymaking machine includes a frame, a turning or raking rotor and a sensor arranged on the frame, and a control device. In a working position, the turning or raking rotor is drivable relative to the frame about an axis of rotation in a direction of rotation. The turning or raking rotor has tine arms which have tines. The tine arms are aligned at least temporarily to face the ground. The tine arms are arranged uniformly distributed in a circumferential direction around the axis of rotation and are aligned in an approximately radial direction with respect to the axis of rotation. The sensor continuously detects a passing of the tine arms during an operation of the turning or raking rotor and transmits a measurement signal thereof. The control device receives the measurement signal and infers an operating state of the at least one turning or raking rotor based thereon.

The disclosure relates to a tedder comprising a main frame connectable to a carrier vehicle, two pivotal wing arms including at least one carrier beam respectively oriented transversely to the direction of travel, a plurality of rotors arranged on the carrier beams for tedding and turning harvested material and a hydraulic system. The hydraulic system comprises two folding cylinders for folding the wing arms and a pressure closing valve for limiting the hydraulic pressure of the folding cylinders. The hydraulic system further comprises a carrier cylinder for lifting the carrier beams with respect to the main frame, wherein a valve means that is formed and arranged to bypass the pressure closing valve upon actuation.