On steep ground the limit is the machine, not the timber. A conventional harvester can only hold so much gradient, and on wet or unstable faces it reaches that limit early. Steep-slope harvesting uses carriers built for that ground: walking excavators, which can work slopes a tracked machine can’t, and harvesters tethered to a winch that holds them on the face, each fitted with a harvester head matched to the carrier and the size of timber.
Exc@v8 supplies Menzi Muck walking excavators for this work, specifies the head and tooling for the site, and adapts standard machines in-house when the job needs it.
A20
The A20 is Menzi Muck's smallest walking excavator — hydrostatic two-wheel drive, removable plug-in axles and a mechanically telescopic stabiliser, sized for helicopter transport from a starting weight of 2,000 kg.
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A25
The A25 pairs the same hydrostatic two-wheel drive, removable plug-in axles and mechanically telescopic stabiliser as the A20 with a larger frame and more engine power — Menzi Muck's second-lightest walking excavator, from 2,300 kg.
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Konrad Highlander Harvester
The Konrad Highlander is a wheel harvester developed for steep terrain, working where other harvesters give way to cable cranes, in two versions: the four-wheel HL10-2 and the six-wheel HL20-2, both with a 212 kW FPT engine and a Woody harvester head.
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Konrad KDH40-1 Thinning Harvester
The Konrad KDH40-1 is a tracked thinning harvester built on a Wacker Neuson ET90, with a Woody WH40-2 harvester head, a 9.3 m reach and an upper carriage that tilts up to 22° to compensate on slopes.
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Konrad Woody WH50-1 Harvester Head
The Konrad Woody WH50-1 is a versatile harvester head: 1,100 kg with its rotator, three feed rollers with 32 kN of feed force, a 1,030 mm grapple opening and a 550 mm cut.
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Konrad Woody WH60-1 Harvester Head
The Konrad Woody WH60-1 is an all-round harvester head for hardwood and heavy mountain timber, with four driven feed rollers, 35 kN of feed force, a 1,200 mm grapple opening and a 680 mm cut.
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Konrad Woody WH65-1 Harvester Head
The Konrad Woody WH65-1 is the latest generation of Woody harvester head, built with a heavy frame for damaged and heavy timber on carriers such as tracked excavators from 20 tonnes, with a 750 mm cut and 40 kN of feed force.
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Konrad Woody WH70-1 Harvester Head
The Konrad Woody WH70-1 is a harvester head for heavy wood on carriers from 22 tonnes, with four driven feed rollers, 37 kN of feed force, a 1,260 mm grapple opening and a 750 mm cut.
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M220
The M220 is Menzi Muck's M2 walking excavator — an economical option for demanding work, with a 75 hp turbo diesel and an assembly concept that breaks it down for transport by helicopter, cable car or crane.
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M425X
The M425X walking excavator runs on two removable quick-release axles with wheels, with a hydraulic telescopic stabiliser and Menzi's hydrostatic drive — at a starting weight of 10,600 kg, the lightest of the three M4X models.
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M435X
The M435X walking excavator combines Menzi's hydrostatic H-Drive all-wheel drive and P-Vation parallel support with hydraulic height adjustment on the steering wheels and a hydraulic telescopic stabiliser — one of three models in the M4X range.
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M445X
The M445X walking excavator pairs Menzi's hydrostatic H-Drive all-wheel drive and P-Vation parallel support with four equally sized wheels up to 710 mm wide — one of three models in the M4X range, from 11,500 kg.
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M525X
The M525X walking excavator runs on two removable quick-release axles with wheels, with a hydraulically telescopic stabiliser and Menzi's Vx-Drive up to 15 km/h — at a starting weight of 12,400 kg, the lightest of the three M5X models.
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M535X
The M535X walking excavator combines Menzi's P-Vation parallel support with hydraulic height adjustment on the steering wheels and a hydraulically telescopic stabiliser — one of three models in the M5X range, built to work on slopes up to 45° in the fall line.
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M545X
The M545X walking excavator pairs Menzi's P-Vation parallel support with infinitely variable Vx-Drive up to 15 km/h and four equally sized wheels up to 800 mm wide — the flagship of the M5X range, from 13,500 kg.
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