UMZ T trolleybuses overhaul services providing is arranged by Litan JSC on the basis of Dnepropetrovsk Electric Transport Overhaul Factory where necessary technical base and high level of expertise are available. The overhaul cycle can be divided into several stages. At the first stage defects are detected and the vehicles are disassembled. At the second stage the units and equipment dismounted from the vehicle are directed to the related workshops. The experts' of different Factory sections qualification and experience ensure the quality analysis of the equipment technical condition and prompt and effective defects removal. At the third stage the repaired equipment, units and parts are assembled and further operational capability check-up are held. Specially designed technological equipment is used for such check-ups. These technologies provide for all trolleybus system monitoring after assembling and high level of repair made within the shortest possible time. The overhaul services include: complete frame replacement, complete electric wire system (banded cables) replacement, complete pneumatic wiring layout replacement, complete body and roof boarding replacement, complete passenger cabin renewal, etc. The Overhaul Factory provides 6 month warranty for its products.