Volvo Construction Equipment has launched kits which allow machines fitted with European Stage IIIB-compliant engines to be ?de-tiered? for sale as used machines in lesser regulated markets. The modification is necessary, as diesel with very low sulphur content tends not to be available outside highly regulated markets like Europe, Japan and the US. Ultra-low sulphur diesel is essential for equipment fitted with Stage IIIB and higher emissions control systems.

The systems available from Volvo are for its four, six and eight cylinder (D4H, D6H and D8H) medium duty engines from about 100 kW to some 385 kW. They allow the engines to run on fuel with as high as 1,000 parts per million (ppm) of sulphur. The conversion kit is available for a range of Volvo machines, including wheeled loaders, excavators, compactors and pavers.