Oliver Super 55

Last Updated: July 2024

Overview

The Oliver Super 55 is a 2WD utility tractor that was manufactured by Oliver between 1954 and 1958. It is equipped with a choice of either a 2.4L four-cylinder gasoline or a 2.4L four-cylinder diesel engine. The tractor features a 6-speed unsynchronized gear transmission with a dry plate clutch, offering 6 forward and 2 reverse gears, and operates on a 73-inch wheelbase. It has an operating weight of 3,400 lbs and came with a standard open operator station. The Super 55 is designed for various farming operations and requires low maintenance, making it suitable for a wide variety of tasks on the farm. Based on independent test results from the University of Nebraska Tractor Test Laboratory, the tractor produced a maximum power of 35.91 HP at 1650 rpm and had a fuel consumption of 3.46 Gal/hr at maximum power. At rated engine speed, it delivered 28.90 HP with a drawbar pull of 2784 lbs and a speed of 3.24 mph. The fuel efficiency at standard PTO speed (540 rpm) was 11.87 Hp.hr/gal.
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Key Specifications

Category: Utility

Transmission: Unsynchronized gear

Drive Type: 2WD

Operating Weight: 3400

Fuel Type: Gasoline/Diesel

Oliver Super 55 vs. Similar Tractors

Operating Weight
Below Average
Greater than 29% of similar tractors.

Technical Specifications

Engine

Manufacturer
Oliver
Model
Oliver
Cooling Type
Liquid-cooled
Cylinder Orientation
Inline
Valve Configuration
-
Fuel Type
Gasoline/Diesel
Induction Type
Naturally aspirated
Cylinders
4
Displacement (ci)
144
Bore (in)
3.5
Stroke (in)
3.75
Rated RPM
2000
Power Output (hp)
-

Transmission

Type
Unsynchronized gear
Forward Gears
6
Reverse Gears
2
Total Gears
-

Dimensions

Length (in)
120
Width (in)
-
Height (in)
71
Operating Weight (lb)
3400

Power Take-Off (PTO)

PTO Type
Live
PTO Speed 1 (rpm)
540
PTO Speed 2 (rpm)
-
PTO Speed 3 (rpm)
-

Miscellaneous

Chassis
4x2 2WD
Drive Type
2WD
Steering Type
-
Coolant Capacity (qts)
14
Front Tire Diameter (in)
16
Front Tire Width (in)
6
Rear Tire Diameter (in)
28
Rear Tire Width (in)
-
Front/Rear Rim Diameter (in)
-
Tire Type
Agricultural
Manufacture - End Year
1958
Hitch Type
-
Hitch Category
-
Hitch Position
-
Hitch Capacity (lb)
-
Operator Station Type
Open
Starter Type
Electric
Brake Type
Mechanical disc
Hydraulic System Type
-

Test Results

Nebraska Tractor Test Laboratory - Test Date: September 27, 1954

Maximum Power and Fuel Consumption

  • Maximum Power: 35.91 HP (26.78 kW) at 1650 rpm
  • Fuel Consumption at Maximum Power: 3.46 Gal/hr (13.10 l/h) with a fuel efficiency of 0.977 lb/hp.hr (0.594 kg/kW.h)

Drawbar Performance

  • Power at Rated Engine Speed: 28.90 HP (21.56 kW) with a drawbar pull of 2784 lbs (12.38 kN) and a speed of 3.24 mph (5.21 km/h)
  • Fuel Consumption at Rated Speed: 0.955 lb/hp.hr (0.581 kg/kW.h) with a fuel efficiency of 10.86 Hp.hr/gal (2.14 kW.h/l)

Torque and Engine Performance

  • Maximum Torque: Not specified in the test results provided
  • Torque Rise: Not provided

Hydraulic Performance

  • Maximum Force Exerted: Not specified in the test results provided
  • Pump Delivery Rate: Not provided
  • Hydraulic Power: Not provided

Overall Efficiency

  • Fuel Efficiency at Standard PTO Speed (540 rpm): 11.87 Hp.hr/gal (2.33 kW.h/l)
  • Fuel Consumption: 3.51 Gal/hr (13.30 l/h) at 1620 rpm

    Nebraska Tractor Test Lab.(1954).Test 524: Oliver Super 55. Lincoln, NE: Nebraska Tractor Test Laboratory. Retrieved from https://digitalcommons.unl.edu/tractormuseumlit/521

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