Case Study

International Heavy Forging Company

Heavy Quenching Crane Hydraulic Ram Repair

Customer: International Heavy Forging Company

Located in the north of England. "83 crane" is a heavy engineering crane used for quenching rolls of very large dimensions. Its water-hydraulic cylinders and 5 crosshead sheaves allow it to lower loads at high speed. In operation since 1912, it was put out of service in 2014 due to a major failure. The cylinder sheared near the joint with the crosshead.

PLS was called to propose an urgent solution as this crane is vital for production. Working at a height of 30+ metres and in a very reduced and awkward space set very challenging conditions for this project. The plan developed consisted of the following stages:

  • Fix the position of the crosshead with bespoke props and supports to ensure a safe working environment
  • Use existing slots at the base of the crosshead to anchor a steel sheet using specially designed clamps
  • Manufacture a cylindrical clamp to hold the cylinder by friction
  • Lift cylinder and weld together cylindrical clamp and steel sheet, thus joining the hydraulic cylinder to the crosshead base.

Thanks to the experience and expertise of PLS the crane the crane was put back in operation in less than one month.