Claas: Next-generation twin-rotor Liner rakes unveiled

ByWniF editors

Sep 24, 2021
The Claas Liner 2700 Trend twin-rotor rake has been introduced for 2022
The Claas Liner 2700 Trend twin-rotor rake has been introduced for 2022.

Claas has updated its range of twin-rotor Liner rakes with the introduction of seven new models with simplified controls and the brand’s customary first-class performance. Two Business models with Active Float rotor suspension complete the new range.

Claas has long been a leading supplier of rotary rakes and these new models offer numerous innovative features and functions designed to make life easier for users and guarantee premium forage quality.

Like their predecessors, the latest generation Liner twin-rotor rakes offer excellent ground-contour following for clean raking with low forage contamination. The Grass Care rotor guidance system ensures that the rotors are actively suspended during operation. When the rotor arms are lowered, the rear rotor wheels touch down first, producing a “jet effect” that prevents the tines from digging in and damaging the grass sward. The Business models are equipped with individual rotor lift operated by preselection on the terminal as standard; this function is optionally available for spool valve operation on the Trend versions.

Twin-rotor Liner overview

Model

Working width

Rotor diameter

Tine arms per rotor

Liner 3100 Trend

8.70-10.00m

4,200mm

14

Liner 2900 Business

8.00-9.00m

3,800mm

14

Liner 2900 Trend

8.00-9.00m

3,800mm

14

Liner 2800 Business

7.40-8.20m

3,500mm

12

Liner 2800 Trend

6.80-7.40m

3,500mm

12

Liner 2700 Trend

6.80-7.40m

3,200mm

12

Liner 2600 Trend

6.20-6.80m

2,900mm

11

The Liner 2600 and 2700 are fitted with a four-wheel chassis as standard, while the Liner 2800, 2900 and 3100 come with a six-wheel chassis. The wheels are positioned close to the circle of rotation of the tines to ensure smooth rotor guidance and optimum ground-contour following. The front two chassis wheels are steerable. With the six-wheel system, the rear rotor wheels are replaced with pendulum axles.

There are seven twin-rotor Liner rakes in the 2022 line-up with working widths up to 10m
There are seven twin-rotor Liner rakes in the 2022 line-up with working widths up to 10m.

 

The chassis design pulls the rotors across the field, which combined with the floating cardan suspension with generous three-dimensional rotational movement, ensures outstanding ground-contour following even on uneven ground. This provides optimum raking performance with minimal forage contamination.

The rake height can be easily read off the scale on the rotor’s central shaft and quickly adjusted by means of a crank handle on the rotors. Hydraulic rotor height adjustment is also optionally available for the dual-rotor swathers with central swathing. With the Liner 2900 and 2800 Business, the height of each rotor can be controlled separately using the preselection function on the ergonomic Cemis 10 control unit and then actuating the tractor spool valve. As an option, the Trend version of the Liner dual-rotor swather can be supplied with hydraulic rotor height adjustment with direct spool valve control.

The tine arms of the Liner 3100 to 2700 models are firmly attached by the 20-spline shaft with no play and secured with a Profix bracket. In the event of a collision with an object, the tine arms deflect at a predefined bending point to avoid damaging the auxiliary gearbox. Inserting and removing the tine arms is quick and very straightforward.

The dual tines with windings are fitted on the tine arm and secured with a bolt to reduce the risk of breakage. Should a breakage occur, the retainer reliably prevents the tine from flying off. Each tine arm is fitted with five 9.5mm thick dual tines. The double-angle silage tine is kinked at an angle of 10 degrees to create a 10 mm long trailing end to help lift the crop of the stubble. This design ensures gentle and effective raking performance and optimal swath formation.

The twin-rotor Liner rakes fole for transport
The twin-rotor Liner rakes fold for transport.

The rotors are fitted with individual friction clutches to protect against overload – they respond more smoothly than cam clutches and allow work to continue non-stop even during load peaks. The freewheel of the drive shaft is positioned directly inside the Y-gearbox, enabling the rotors to rotate freely in transport position.

On the Liner 3100, 2900 and 2800 the working width and swath width are adjusted hydraulically and synchronously using the telescopic arms. On the Liner 2700 it uses a single acting hydraulic ram, and on the 2600 they are adjusted mechanically. The Liner 2700 uses a pin and hole system with four different positions; in the Liner 2600 three different working widths can be set using adjustment bolts.

Active Float hydraulic rotor suspension is standard on the two Liner 2900 Business and Liner 2800 Business models. This functions in a similar way to the suspension of the same name in the Disco Contour disc mowers. Active Float is easy adjusted directly on the machine, with a gauge on the main frame indicating the pressure in the hydraulic circuits. The ground pressure of the rotor can be adapted precisely to the forage quantity and ground conditions by adjusting the suspension pressure. This ensures faster operating speeds and reduces crude ash contamination.

All new Liner twin-rotor rakes are steered by a wide, robust transport axle with zero-play mechanical forced steering. The steering angle can be mechanically adjusted from a soft to a sharp response and for turning. The angled position of the wheel mounts ensures that only light steering forces are needed and also makes for perfectly smooth running. Speeds of up to 40km/hr can be achieved on the road.

The Liner 3100 comes with wheel weights as standard to further improve stability. Wheel weights are optionally available for all other Liner dual-rotor swathers. The Liner 3100 to 2700 have a transport width of 2.97m, while with 260/75-15.3 tyres the Liner 2600 comes in at 2.55m allowing better access through small gates and narrow roads. All Liner dual-rotor swathers except the Liner 3100 have a transport height of 4.00m with tine arms attached. On the Liner 3100 it is necessary to remove three tine arms per rotor to achieve this height.

www.claas.co.uk