"Half of the profits of the first expo - $10,000 - went to the Hawke's Bay Rescue Helicopter.
"This time, if we make any money, we will give 50 per cent of the profits away again, which will be divided equally between the SPCA, the Hawke's Bay Rescue Helicopter, Alzheimers New Zealand and Cranford Hospice."
In keeping with the expo's theme of "old and new", the 8ha paddock would be packed with static and working displays of vintage machinery, as well as modern trucks, tractors and earthmoving machinery.
The centre of the paddock will again be dominated by a large arena with plenty of displays and demonstrations, and knowledgeable commentary by David Edgar, from Tapanui in Southland.
"The first expo featured 165 working vintage stationary engines, and we expect a significant display in this area again," Mr Harrington said.
The old steam traction engines would be back this year, as well as Steve Muggeridge and his team of clydesdales giving cart rides and ploughing demonstrations.
Hastings man Malcolm Baker was bringing his horses, and wagons from the World War I era, to give military demonstrations, while Jim Banks was bringing along his circus with performing ponies and dogs to entertain the children.
There would also be plenty of action in the skies, said Mr Harrington.
Jim Guerin of Helicopters Hawke's Bay will be offering 10-minute helicopter rides, while Ross Macdonald will be performing aerial displays in a Tiger Moth.
Hallett Griffin of Griffin Air will again provide spectacular fertiliser-spreading displays.
"Watching Hallett at the last expo was a highlight for many," said Mr Harrington.
"This time Paul Gleeson from Mangatainoka is organising comprehensive fertiliser-spreading demonstrations, starting from a man spreading by hand, right through to the latest trucks and equipment.
"This will be filmed by Bill and Linda Hohepa for a future documentary."
Mr Harrington said there would be something for all the family.
"There will be a boutique-style market with more than 50 stalls selling a variety of food, arts and crafts, clothing, plant nurseries and much more.
"There is also a petting zoo and rides for the children.
"It is great for Hawke's Bay to hold such a large unique event as this and the generous amount of support the club has received from local farmers and businesses is very much appreciated."
Anyone wishing to exhibit vintage machinery at the expo should complete an exhibitor's registration form, which can be found on the club's website, hbvintagemachinery.org.nz
Details:
What: Junction Vintage Machinery Expo
When: 8.30am-4pm, Saturday and Sunday, March 25-26.
Where: Corner of SH2 and Byrne Rd, Takapau, 25km south of Waipukurau.
Entrance Fee: Adults $10, children under 15 free. Entrance and parking off Byrne Rd. No dogs please.