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Wittgen 2500SM Tensioning Cylinder 57301

The disassembly and maintenance of hydraulic cylinders are as follows:

1. Remove the cylinder bottom, cylinder head, and guide sleeve. Before removing the hydraulic cylinder, the adjusting handle or pressure regulating screw of the overflow valve should be loosened to relieve the pressure of the hydraulic circuit.

2. Usually, the oil in the two chambers of the oil cylinder should be drained, then the cylinder head should be removed, and finally the piston and piston rod should be removed. During this period, it is necessary to prevent piston rod impact and injury.

3. Pistons are usually threaded connections, but there may be retaining screws that need to be removed first.

4. Finally, remove the sealing plate.

5. Bake the scratched area with an oxygen acetylene flame (control the temperature to avoid surface annealing), and remove the oil that has penetrated the metal surface until there are no sparks or oil carbonization.

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