"An old boy had it," he said.
The man's wife had been tidying up loose ends and was happy to give the crane away.
Despite picking it up for free, Mr McClune has spent $10,000 so far transporting it down the country, and said he would have to save a bit longer before bringing the rest of the pieces down.
The crane was built in 1937 at the Bush Tramway on the Pukemiro Line in Huntly, Waikato. It has been used for bridge building on railway lines.
"We'll clean her all up, get it up and running, paint it ..."
Mr McClune didn't have any further plans for the crane once it was fixed, but said people were welcome to come and look at it.
He wanted to thank J&B Contracting, Watson Earthworks, Matthews Engineering, Emmetts Cranes, PTSL and Steam Machinery for helping him get the crane down to Wanganui.
"If it wasn't for their help it wouldn't have been possible."