The fixing shafts were rusted and tight, so we used a knock-out tool and a sledgehammer to knock them out of the bushing, which took a long time. A complicating factor during the project was that there was a deep tunnel at one of the locations we had to lift the overhead crane from. In fact it was right under our 60-tonne truck crane, so we had to make sure that the crane’s jacks were resting on the load-bearing column in the basement. There was no information available on the weight of the overhead cranes, so we had to estimate their weight based on their size and material. There was no lifting point on the overhead cranes either, so we had to install one ourselves, bearing in mind that when the crane lifted off the track, it would be just our 60-tonne truck crane holding it. Despite the many challenges, the project was successfully completed to the customer’s satisfaction.