1600 built by Shibaura), Allis-Chalmers began importing Hinomoto tractors with Toyosha diesel engines from Japan. They were rebadged with the Allis-Chalmers brand for U.S. sales. In 1978, a joint venture with Siemens, Siemens-Allis, was formed, supplying electrical control equipment. 1980s and 1990s The company began to struggle in the 1980s in a climate of rapid economic change. It was forced amid financial struggles to sell major business lines. In 1983, Allis-Chalmers sold Simplicity, the lawn and garden equipment division, to the division's management. 1985 was a year of great dissolution for Allis-Chalmers—the year when it folded three of its main business lines: The Fiat-Allis joint venture in construction equipment, over which the firms' managements had long since had a falling-out, ended when Fiat bought out Allis's remaining minority stake. It renamed the company Fiatallis. The Allis-Chalmers farm equipment business line ended when Allis sold it to K-H-D (Klöckner-Humboldt-Deutz, Deutz AG) of Germany, at the time the owner of Deutz-Fahr. K-H-D renamed the business as Deutz-Allis and discarded the Allis Chalmers 8000 Series tractors and Persian Orange branding in favor of spring green tractors built by White Farm Equipment with Deutz air cooled engines. The Siemens-Allis joint venture in electrical controls ended when Siemens bought out Allis's remaining minority stake. Siemens then blended the company into the Siemens Energy and Automation division. In 1988, Allis-Chalmers sold its American Air Filter filtration business (with 27 production facilities internationally and sales into 100-plus countries) for approximately $225 million to SnyderGeneral Corporation of Dallas, a leading global air quality control firm. In 1990, Deutz-Allis was sold to its management and became Allis-Gleaner Corporation (AGCO). Tractors began selling under the AGCO-Allis name and were again painted Persian Orange. The AGCO brand of orange tractors was produced until 2011 when AGCO announced that it was phasing out the brand. In 1998, what remained of the Allis-Chalmers manufacturing businesses were divested, and in January 1999, the company officially closed its Milwaukee offices. The remaining service businesses became Allis-Chalmers Energy in Houston, Texas. Brand reuse, 2000 to present In August 2008, Briggs & Stratton announced that it would sell lawn tractors under the Allis-Chalmers brand name. Former sites Agricultural machinery Allis-Chalmers offered a complete line of agricultural machinery, from tillage and harvesting to tractors. Tractor models In 1959, a team led by Harry Ihrig built a 15kW fuel cell tractor for Allis-Chalmers which was demonstrated across the US