Supply chain disruptions and industrial disputes at Australian ports are starting to cause delays for the WesTrac heavy machinery business owned by Seven Group Holdings that distributes Caterpillar trucks and equipment to mining and infrastructure companies.

Seven Group Holdings chief executive Ryan Stokes said on Wednesday that while demand is still strong in the mining and infrastructure sectors in the first few months of 2021-22, the impact of supply chain disruptions causing problems for many industries is now felt at WestTrac.