Wind turbine capacity is constantly increasing. Ever larger turbines are being built specifically for offshore installation. Eight megawatt capacities and 180-meter rotor diameters are the current maximum. Only limited simulations can be made of the influence increased traverse forces have on the structures and drives. It does not make it easy for seal suppliers to gain wind turbine manufacturers’ trust. “Many have already been disappointed, such as the use of inappropriate materials in the primary bearings,” says Koch. Particularly in such cases, Freudenberg can provide ad hoc help. “We not only deliver a quick replacement but can also supervise the installation of new seals and train service technicians on site.” In the many times they helped with installation, Kuhnert and Koch have proven that seals can be successfully replaced while in the nacelles, directly on the shaft and without any complicated disassembly. Word of this has also gotten around the industry.