Yanmar Celebrates 30 Years of Zero Tail Swing ViO Excavators Working Safely in Tight Locations

• Yanmar Compact Equipment marks the 30th anniversary of its ViO series, the first zero tail swing excavators, enhancing safety in confined spaces since 1993.

• The ViO series revolutionized the industry by ensuring the excavator's cab and superstructure do not extend beyond its tracks, reducing the risk of collision in tight areas.

• Zero tail swing excavators, pioneered by Yanmar's ViO series, now constitute a significant portion of the compact equipment market, with the ViO range continuing to lead.

• Yanmar engineers innovated to maintain the ViO's lift capacity without the traditional protruding counterweight, ensuring versatility and balance.

• The ViO range, now in its 7th generation, includes models like the award-winning ViO80-7, recognized in the 2023 Good Design Award by the Japan Institute of Design Promotion.

• The current ViO17 model exemplifies the series' evolution with a tight turning radius and impressive lifting capabilities, despite its compact size and weight distribution.

• Yanmar celebrates the ViO's 30th anniversary with a commemorative short video, highlighting the series' impact and continued relevance in the industry.

With the launch of the ViO series in 1993 Yanmar Compact Equipment popularized the zero tail swing excavator concept – revolutionizing the ability to work safely in confined locations.

Advertisement

The launch 30 years ago of the Yanmar CE ViO range of compact excavators caused a sensation. Unlike other excavators of its kind at the time, the ViO at no stage of its rotation did the rear of the cab/superstructure extend beyond its tracks. This meant that the machines could operate in the tightest of spaces without fear of a rear collision with nearby buildings, vehicles – or people. The concept was embraced by the global industry and soon displaced as much as 70% of the standard models on worksites.

Although zero tail swing excavators are now a dominant part of the compact equipment market – the ViO is still leading the way 30 years on. Collectively, many thousands of collisions and accidents have been avoided, and work in the tightest of spots been made possible – all thanks to the launch of Yanmar CE’s ViO range.

Defying the laws of physics

The zero tail swing concept is much cleverer than just shrinking the size of the superstructure. In traditional excavators having a protruding counterweight at the rear of the excavator is useful in balancing loads at the front, when lifting or digging, for example. But with this removed, the engineers at Yanmar CE needed to create similar counterweight forces by other means, while still maintaining impressive lift capacity.

The ViO is incredibly versatile, and able to work in the tightest and narrowest of jobsites. Now in its 7th generation, the range has expanded and is still going strong. Recently the designed-for-Japan ViO80-7 was declared a winner in this year’s prestigious Japan Institute of Design Promotion’s 2023 Good Design Award.
The ViO zero tail swing concept has consistently developed over the last 30 years. The ViO17 (pictured top) is a good example of the current breed. Neither the counterweight, nor the front part of the upper frame extend beyond the track width. This gives the 4,023-pound (1.8-metric ton) model an extremely tight turning radius. And yet, thanks to its 4-foot, 2-inch (1,280-mm wide) undercarriage, large counterweight and good weight distribution, it equals or surpasses conventional machines, as well as having great lifting capabilities.
To commemorate the ViO’s 30th anniversary a short video has been produced.