Upton HT-14/350
Power
350 hp
Production
1978
Engine
Aftercooled turbocharged diesel, 6-cylinder
Transmission
Spicer
Weight
51,000 lbs [23133 kg]
Drive
2WD
Introduction
Upton HT-14/350: Heavy-Duty Two-Wheel Drive Tractor
The Upton HT-14/350 is a high-capacity, two-wheel drive tractor manufactured in 1978 in Corowa, New South Wales, Australia. Recognized as one of the largest two-wheel drive tractors ever produced, this machine was engineered for intensive agricultural operations requiring significant traction and power.
Engine and Performance
The tractor is powered by a Cummins NTC-350, a 14.0-liter, 6-cylinder turbocharged and aftercooled diesel engine. It generates 350 horsepower (261.0 kW) at a rated speed of 2100 RPM. This liquid-cooled unit features a bore and stroke of 5.50x6.00 inches and a compression ratio of 14:1, providing the torque necessary for heavy-duty field applications.
Transmission and Hydraulics
Power is delivered to the ground through a Spicer transmission system, offering 14 forward and 4 reverse gears to suit various workload requirements. The hydraulic system provides a total flow of 48.08 gpm (182.0 lpm) at a pressure of 2031 psi (140.0 bar), with a reservoir capacity of 56 gallons (212.0 L).
Mechanical Configuration and Dimensions
Designed for heavy-duty traction, the machine weighs 40,480 lbs (18,361 kg) with an operating weight of 51,000 lbs (23,133 kg). Over 80% of this weight is supported by the rear axle, which has a 65,000-pound capacity and is fitted with large 33.5x33 earthmover tires. The tractor features a wheelbase of 154 inches and a width of 141 inches. It is equipped with Westinghouse drum brakes and a standard cab including air conditioning and a stereo system.
Conclusion
With its substantial mass and high-horsepower Cummins engine, the Upton HT-14/350 was designed for large-scale agricultural tasks where two-wheel drive traction could be effectively utilized. Its unique design and limited production status make it a significant piece of heavy tractor engineering from the late 1970s.
Production Information of Upton, HT-14/350
- Standard-tread tractor
- The Upton HT-14/350 is one of the largest two-wheel drive tractors ever built. The rear axle has a 65,000 pound capacity and the tractor is was originally equipped with 20-ply earthmover tires. Over 80% of its 25-ton weight was carried on the rear.
- Built in Corowa, New South Wales, Australia
| Manufacturer | Upton |
|---|---|
| Original price | $70,000 (1978) |
| Total built | 1 |
Dimension and Tires Information of Upton, HT-14/350
| Ground clearance | 19 inches [48 cm] |
|---|---|
| Wheelbase | 154 inches [391 cm] |
| Weight | 40,480 lbs [18361 kg] |
| Height | 137 inches [347 cm] |
| Length | 258 inches [655 cm] |
| Operating weight | 51,000 lbs [23133 kg] |
| Width | 141 inches [358 cm] |
| Ag front | 18.4x26 |
|---|---|
| Ag rear | 33.5x33 |
Engine Specifications of Upton, HT-14/350
- Cummins NTC-350
- Liquid-cooled
- Aftercooled turbocharged diesel
- 6-cylinder
| Power | 350 hp [261.0 kW] |
|---|---|
| Displacement | 855 ci [14.0 L] |
| Compression | 14:1 |
| Bore/Stroke | 5.50x6.00 inches [140 x 152 mm] |
| Rated RPM | 2100 |
Transmission Information of Upton, HT-14/350
Transmission variants 1
| Transmission | Spicer |
|---|---|
| Gears | 14 forward and 4 reverse |
Mechanical Specs of Upton, HT-14/350
- Two-wheel drive
- Westinghouse drums brakes
- Cab standard with air-conditioning and stereo.
Power Information of Upton, HT-14/350
| Engine | 350 hp [261.0 kW] |
|---|
Hydraulics Specifications of Upton, HT-14/350
| Capacity | 56 gal [212.0 L] |
|---|---|
| Pressure | 2031 psi [140.0 bar] |
| Total flow | 48.08 gpm [182.0 lpm] |
Where it sits
With 350 HP, the Upton HT-14/350 sits just above 225 (225 HP) in Upton's range. Its power puts it in the 98th percentile of 1970s models in our database (1259 machines).
Frequently asked questions
How much horsepower does the Upton HT-14/350 have?
The Upton HT-14/350 delivers 350 HP.
What years was the Upton HT-14/350 produced?
The Upton HT-14/350 was produced in 1978.
What engine does the Upton HT-14/350 have?
The Upton HT-14/350 is powered by a Aftercooled turbocharged diesel, 6-cylinder engine.
What transmission does the Upton HT-14/350 use?
The Upton HT-14/350 uses a Spicer transmission.
How much does the Upton HT-14/350 weigh?
The Upton HT-14/350 weighs 51,000 lbs [23133 kg].
Is the Upton HT-14/350 4WD?
The Upton HT-14/350 is available in 2WD.