Friday, 19 June 2020 09:54

CLAAS releases half-track tractors

Written by Mark Daniel

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The intelligent drive control system means the tracks are capable of performing tight turning manoeuvres.

First seen as concepts at Agritechnica two years ago, CLAAS has now released the world’s first half-tracked tractors with full suspension.

The two new models, the AXION 960 TERRA TRAC (445hp) and AXION 930 TERRA TRAC (355hp), incorporate the proven tracked assemblies utilised in the company’s LEXION and JAGUAR grain and forage harvesters.

The company suggests that Terra Trac improves traction and reduces soil compaction, whilst still retaining the driving characteristics of a wheeled tractor. With an operating weight of 16.5t and a maximum gross weight of 22t, load capacity of 5.5t.

Currently available with 457mm (18”), 635mm (25”), 735mm (29”) and 890mm (35”) track widths. The 890mm track is 35% larger than a 900/60 R42 tyre, offering a footprint of 3.87 square metres.

This equates to 15% more tractive power and a 50% reduction in ground pressure, while remaining within a sub-3m external operating width.

The rear axle of the AXION has been substantially modified to accommodate the TERRA TRAC units, which in turn, have been modified to improve traction. The drive wheel has been increased in size to meet the specific power transfer needs and high levels of torque, while the transmission inside the crawler tracks has been strengthened to transmit higher torques.

Each track assembly can pivot up to 23 degrees longitudinally, combining with individually-suspended rollers, to maintain optimum ground contact in all soil conditions, terrain and operating speed.

The tracks use a force-locking drive and are maintained at a higher tension for even pressure distribution, with friction blocks on the drive wheel to transfer drive forces to the track belt and at the same time create a self-cleaning effect.

The CMATIC continuously variable transmission allows precise control at low speeds and up to 40 km/h on the road.

An intelligent drive control system means the tracks are capable of performing tight turning manoeuvres, offering the operator the choice of three levels of steering assistance or adjust the tractor’s ground clearance by up to 12cm for specific jobs.

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