Philanthropist Gary Rooney Donates Historic Scraper for Display

A historic Terex S24 scraper, generously donated by philanthropist and director of the Rooney Group, Gary Rooney, is now on display as part of a collection celebrating earthmoving machinery used in the Upper Waitaki Power Development. This addition highlights the significant role these machines played in excavating and placing materials for the canals that link Lakes Tekapo, Pukaki, and Ohau, as well as for various dams and powerhouse sites.

The S24 scraper joins other notable units, including the Caterpillar 631 and International 295, which were essential to the earthworks that shaped the region. Last month, the Rooney Group transported the S24 to Temuka, where it underwent sandblasting and painting in preparation for its new role in the display.

Rick Ramsay, convener of the Heritage Group, expressed enthusiasm about the addition, stating, “There are a lot of operators who will fondly recall the distinctive roar of these machines, and to again see one in the Mackenzie Basin on display is a big addition.” He further acknowledged Mr. Rooney’s significant contribution, highlighting both the donation and the logistics involved in transporting the machine.

The Terex S24 scraper is powered by a V12 General Motors two-stroke diesel engine, paired with an Allison CLBT-5865 six-speed powershift transmission, offering a top speed of 50 kph. The transmission features a hydraulic retarder that assists the shoe brakes. With a bowl capacity of 18 cubic meters struck or 24 cubic meters heaped, these scrapers were formidable machines.

Despite their impressive specifications, which include over 400 horsepower and a differential lock to prevent wheel spin, the scrapers were primarily push-loaded by bulldozers during the Upper Waitaki project due to the dense nature of the glacial moraine deposits that constituted much of the earthworks.

Clyde Engineering sold a total of 32 S24 scrapers in New Zealand, with the majority being utilized in various hydro schemes. Notable fleet operators included Higgins Earthmoving, Earthmovers Waikato, McBreen-Jenkins, Burnetts Motors, and Doug Hood Ltd. Gary Rooney acquired the construction arm of Doug Hood Ltd around 1998, which included the S24 scrapers.

These machines are known for their rugged build and ease of maintenance, leading to many being refurbished and put back into operation across different projects even today. Some units were repurposed as “dump trucks,” and with the rear stone guard removed, their bowls allowed for easy loading by diggers and smooth material distribution, providing a degree of compaction.

The unit donated to the Twizel display was one of three purchased by the Rooney Group from the North Island for use in the company’s private Rangitata South irrigation Scheme, a venture costing over $130 million. These scrapers were exclusively used for this project and were stored at the company’s depot in Ashburton after completion.

This donation not only preserves an important piece of machinery history but also serves as a reminder of the vital role such equipment played in shaping New Zealand’s infrastructure. The presence of the Terex S24 scraper in the display is a significant tribute to the engineering feats accomplished in the region and the legacy of those who operated these powerful machines.