On the chassis of ADZK was made several fire trucks ADFK with open body. ADFK model was equipped with a 4-cylinder 3.6-liter gasoline engine produced 55 hp, which aggregated with a 4-speed manual gearbox. Gross vehicle weight was 4195 kg.
It had some fire-fighting equipment on board – hoses, fittings, and shovels. The last trucks of this model were produced at Steyr factory, that’s why in some sources this model could be found under the name Steyr-Daimler-Puch AG.