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LINER windrowers, agile and robust

by Giacomo Di Paola
May - June 2021 | Back

The range of LINER windrowers made by Claas comprises four categories of machines. The compact single-rotor models have a working width of 3.2 to 4.8 metres and can be identified by the designations from 320 to 500. In the segment of double-rotor machines with side discharge, the German manufacturer offers windrowers with working widths ranging from 3.5 to 8.6 metres and with the option of either one or two windrows (Twin models).

On the other hand, LINER double-rotor windrowers with central discharge have a greater working width of between 6.2 and 10 metres. The top of the range are four-rotor implements with central discharge; in this case working widths vary from a minimum of 9.9 to a maximum of 15 metres. From a construction point of view, the LINERs have transmission components which are external to the frame and easy to access for maintenance; a gearbox which provides movement to the impellers with an integrated free wheel (thus avoiding load peaks), a spheroidal cast iron cam with high efficiency and high resistance; an oiled and hermetically sealed rotor assembly for permanent lubrication and smooth movement of the impeller components.

The tine arms (the 9.5 mm teeth are bolted to the arm and not to the outer part) are fitted with a special patented PROFIX coupling with 20 special grooves that improve arm stability while eliminating any play. Easy and quick to change in case of damage (just unhook and hook the locking springs), the arms have a predefined flexion point and in case of impact they avoid damage to the central part of the rotor. On all LINER windrowers, with the exception of single-impeller windrowers (except for the 500 model, which is fitted with it), Claas has provided the option of cardanic suspension of the trolley, while the floating suspension - supplied as standard - allows the rotors to be adapted to the morphology of the terrain thanks to the longitudinal and transverse movement of the spherical pin connecting the rotor to the arm.

The rotors are also independent of the frame, which ensures three-dimensional adaptation to uneven ground. Another strength of the rotor is the jet effect, i.e. while lifting, the front wheels of the trolley precede the rear wheels, so as not to damage the windrow or prevent the rotor from getting stuck in the ground. The lifting height can be adjusted mechanically, as can the raking height (which can be set using a graduated scale under the rotor) or hydraulically directly in the cab. Another strong point of the Liner is its manoeuvrability.

Claas windrowers are equipped with an innovative active steering system, which allows them to make significant turns even in tight spaces, as the tractor's turning radius is transmitted to the wheels of the implement, enabling it to follow the correct trajectory.

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