Painting tunnel of the tractor´s bodies – reconstruction. The original separation of paint overspraying was carried out by water washing out by means of pumps and spray nozzles. It was replaced by the separating unit – type DYNACLEAN. This system is with no pumps, water circuit is ensured by extraction fans by means of louvers and exhaust flues. The system is trouble-free with a minimum service costs compared to the original system. Further on, there was carried out heating reconstruction of fresh supply air into the painting tunnel. Steam heating was replaced by a hot water heating with an easy supply air temperature regulation.