Joint Venture Sub Contractors for the Rangiriri section of the State Highway 1 Waikato Expressway, have been putting two sets of 3.6mtr DV 980 Magnums to work cutting the heavy clay subsurfaces to aid in the drying and compaction process.
4AG product specialist Hamish Raikes visited the site in early Spring to conduct a demonstration to a group of Fulton Hogan project management staff with the assistance of James Hanson from Roger Gill Ag, Huntly.
“The clay these guys are working with holds a lot of moisture and is very dense and sticky, Hamish says, and these conditions are an extreme test of any set of discs, particularly their ability to penetrate and turn the dense soil. The performance of the blade scrapers is critical to cleaning such sticky material off the blades as the discs are working. Blade size, concavity, and spacing is also very important for this application, compared with an agricultural contractor who is wanting more versatility to perform in lots of different soil types. The civil guys are looking to cut the heavy clay up, get air into it and dry it out as quickly as they can, before hitting it with heavy earthmoving equipment. Often the clay is cut up, then re-compacted a number of times before they are happy with the firmness of the surface for road building.”
The project managers were suitably impressed with the performance of the DV 980’s hitched to a 250Hp Case tractor, and ordered the second unit there and then on-site. Both sets have been working year round when the weather allows, to keep this strategic roading project on schedule.
“While civil and roading applications are new to 4AG, our track record with discs in some of the more hostile farming environments in the country, allowed us to put them into this specialist type of work knowing they would perform.” “All our product specialists have a broad knowledge of conditions, so could give the right advice and level of specification these guys needed, from experience”.