Covering the Goulburn and Murray valleys

Show us your tractor then...

Australia's biggest tractor has arrived in town for the Seymour Alternative Farming Expo.

JENNA BISHOP February 13, 2014 10:22am

Giant tractor at Seymour Alternative Farming Expo 2014.


What’s orange and green, the size of an army tank, and now in Seymour?

Yes, Australia’s biggest tractor has arrived in town.

Ol Rusty, a purpose-built 1960s era tractor, will be one of the highlights at this weekend’s Seymour Alternative Farming Expo.

The tractor was engineered to specific requirements from the owner, including to be very big, have room for the family to go to church, a shade roof and be made primarily from British components.

The owner also requested it had to run on drum fuel, as bulk delivery was unavailable.

With 25 tonnes and more than 9m in length and 6m wide with triple rear wheels, the tractor has a 120litre Ruston Hornsby engine that produces 1000hp.

The tractor is reportedly the largest ever engineered in Australia.

Expo visitors will have a chance to climb aboard and check out the in-cabin barbecue among other things.

Murray Cook from NSW’s Nifty Engineering, the company responsible for Ol Rusty’s construction, said the machine was built in the early 1960s for a broad-acre farmer who had a bold idea and a big bank account.

‘‘It’s certainly one of the biggest one-off machines ever built here (in Australia) and it’s fitted with a gearbox from a Centurion tank,’’ Mr Cook said.

The tractor has five forward and two reverse gears, with a list of other impressive specifications on this page.

Expo director Colin Stray said the giant tractor had never been seen before in Victoria.

He first saw the tractor some years ago at Henty.

‘‘I was bowled over when I saw the size of it and I know it will be a great additional attraction at this year’s expo,’’ Mr Stray said.

Ruston Hornsby engine (1940-1950)

Centurion drive-line (England about 1957)

Front end tandem steer assembly from Foden truck (1958-1959)Dimensions

Length — 30ft (about 10m)

Width (with triple rear wheels installed) — 20ft (about 6.5m)

Weight — 25tonnes

Engine capacity — 120litres (7328cubicin)

Turbo charged

Bore diameter —10.38in (26.5cm)

Stroke — 14.5in (36.8cm)

Power — 1000hp

Maximum RPM — 500

Fuel consumption — ‘‘lots’’

Drive-line specifications

Drive-line from Centurion tank

Rated at 700hp with 60tonne mass fully optioned

Five forward and two reverse gears

Clutch — triple plate, 18in (45.7cm) Borg and Beck

Final drive — 7:1

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