The Manitowoc MLC650 crawler crane, which features the industry-changing variable position counterweight (VPC), has successfully completed max load testing with the VPC-MAX attachment.

The VPC-MAX attachment for the MLC650 raises the crane?s capacity to 700 t (770 USt), an increase of 50 t (55 USt) over its standard configuration. The VPC-MAX attachment includes additional counterweight and a beam that automatically extends the counterweight beyond the rear of the crane based on lifted load, increasing its load moment. For the max load test, the crane was positioned to apply the maximum stresses through the structure, including the boom positioned over the corner of the crawler crane.

The VPC-MAX attachment provides capacities similar to wagon- or tray- mounted attachments, but requires fewer components and assembly steps, reducing setup time and transportation costs. Also, job sites will require less ground prep, resulting in additional savings, as customers do not have to buy, transport or install as much matting when compared with a traditional configuration.