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Rigid Drawbar Converter Dolly Specification Guidelines

This technical bulletin outlines the specification guidelines for rigid drawbar converter dollies

In May 2018, the Australian Trucking Association’s (ATA) Industry Technical Council embarked on an exciting engineering ‘proof of concept’ project, exploring further development of a rigid drawbar convertor dolly.

The project was the result of member discussions regarding the dynamic issues with hinged drawbar convertor dollies, especially brake re-activity and tyre wear and other experiences with air suspension dollies. Consequently, there has been some trending by operators to mechanical suspensions where braking re-activity seems to be less obvious but does not eliminate nor the solve the issues.

The technical bulletin details the specifications of the project dolly, including fifth wheel positioning, axle group spacing, drawbar length, and suspension and coupling requirements. 

In November 2020, the dolly project supply partners were awarded the Castrol Vecton Industry Achievement Award, recognising the group’s development and implementation of new technologies and designs to improve industry safety and productivity.