1980s
The factory entered its "golden era" during the 1980s. During this time the factory had nearly 20,000 employees. The design offices of Prva Petoletka designed hydraulic systems for many of the hydroelectric power plants in Yugoslavia, the hydraulic drive on a class of massive roto-excavators for surface mines, drive- and control-systems for the sets of the National Theatre in Belgrade, electro-hydraulic system for lifting of the main dome of the Temple of Saint Sava in Belgrade, hydraulics for a modern second-generation tank (the M-84), an inclined marine railway installed in the shipyard in Kladovo, landing gear for Boeing, as well as many large centralized lubrication systems in Yugoslavia.
Prva Petoletka was an important exporter, delivering its products to over 30 countries on several continents. At the height of production, PPT exported about 40% of its products. Petoletka cooperated with major world companies such as Boeing, Bugatti, Lucas, Bendix, Daimler, Martin Merkel, Pol-Mot, Orsta Hydraulik, Wabco Westinghouse, Linde Guldner, Ermeto, and Zahnradfabrik.
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