Replacement of the slewing bearing on a port crane at the Rhine-Herne Canal

For the large milling company Roland Mills GmbH, TEICHMANN KRANE successfully refurbished a 1984 gantry slewing crane with a load capacity of 10 t, including the replacement of the defective slewing bearing. The port crane is used for unloading bulk goods at the Rhine-Herne Canal.

Noise in the Slewing Bearing

After the operator of the crane noticed unusual noises during operation, our crane experts from Essen were consulted. An inspection and measurement revealed bearing damage in the slewing bearing, making its replacement urgently necessary.

Replacement of the Slewing Bearing Using Hydraulic Lifting Cylinders

Since a complete disassembly of the crane's upper carriage was not possible due to a high-voltage line running above it, a walkable steel assembly structure was first built and installed at a height of 14 m at the level of the slewing bearing to be replaced. Three hydraulic lifting cylinders were then attached at three support points to lift the 200 t upper carriage by 300 mm in synchronized operation, each cylinder providing a lifting force of 100 t.

This allowed the defective slewing bearing to be removed and replaced with a new one. This approach eliminated the need to completely dismantle the 200 t upper carriage. The hydraulic cylinder solution, operated via a computer-controlled synchronized system, provided the customer with an efficient and cost-effective method, as it also avoided the use of two costly large mobile cranes to lift the upper carriage.

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