Home
Tractors
Oliver
Super 66

Oliver Super 66

Last Updated: July 2024

Overview

The Oliver Super 66 is a vintage tractor model powered by a Waukesha-Oliver 4-cylinder gasoline engine with a displacement of 144 cubic inches, bore of 3.5 inches, stroke of 3.75 inches, and a compression ratio of 7.00:1. It features an unsynchronized gear transmission with 6 forward speeds (2.14, 3.08, 3.68, 5.31, 6.27, 10.81 mph) and 2 reverse speeds (2.43, 4.19 mph). The steering is manual, and the chassis is a tricycle design. The front tires are 5.00-15, while the rear tires were tested with 10-38 and 9-38 configurations. The tractor has a rear PTO with direct engine drive and an independent clutch. The operating weight varies from 3,495 lb (different fuel config) to 3,943 lb (gas) and up to 6,845 lb with added weights and an operator. Additional features include an oil washed wire mesh air cleaner, a thermostat-controlled cooling system, pressure lubrication, and specific valve dimensions (inlet 1 1/4", exhaust 1"). Extensive performance data is available from the independent test results.

Key Specifications

Transmission: Unsynchronized gear

Operating Weight: 3943 (gas), 3495 (different fuel config), 6845 (with weights and operator)

Fuel Type: Gasoline

Image Gallery

Oliver Super 66 Tractor

Technical Specifications

Engine

Manufacturer: Waukesha-Oliver
Model: -
Cooling Type: -
Cylinder Orientation: -
Valve Configuration: -
Fuel Type: Gasoline
Induction Type: Natural aspiration
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): -
Width (in): -
Height (in): -
Operating Weight (lb): 3943 (gas), 3495 (different fuel config), 6845 (with weights and operator)

Power Take-Off (PTO)

PTO Type: Rear
PTO Speed 1 (rpm): 540
PTO Speed 2 (rpm): -
PTO Speed 3 (rpm): -

Miscellaneous

Chassis: -
Drive Type: -
Steering Type: Manual
Coolant Capacity (qts): -
Front Tire Diameter (in): -
Front Tire Width (in): 5
Rear Tire Diameter (in): -
Rear Tire Width (in): -
Front/Rear Rim Diameter (in): -
Tire Type: Agricultural
Manufacture - End Year: -
Hitch Type: Optional
Hitch Category: -
Hitch Position: -
Hitch Capacity (lb): -
Operator Station Type: -
Starter Type: Electric
Brake Type: -
Hydraulic System Type: -

Test Results

Nebraska Tractor Test Laboratory - Test Date: May 16 to May 19, 1955

Maximum Power and Fuel Consumption

Maximum Belt Horsepower: 33.62 HP at 2001 rpm
Fuel Consumption at Maximum Belt Power: 3.09 Gal/hr with a fuel efficiency of 10.88 Hp.hr/gal (0.556 lb/hp.hr)
Operating Maximum Load Belt Horsepower: 32.83 HP at 2000 rpm with fuel consumption of 2.885 Gal/hr

Drawbar Performance

Rated Load Drawbar Horsepower (10 hours in 4th gear): 22.36 HP at 5.19 mph (1615 lb pull, 4.10% slip)
Maximum Load Drawbar Horsepower: 27.99 HP at 5.15 mph (2037 lb pull, 4.88% slip in 4th gear)
Fuel Consumption at Rated Load: 2.275 Gal/hr with a fuel efficiency of 9.83 Hp.hr/gal (0.616 lb/hp.hr)

Torque and Engine Performance

Maximum Torque: 242.6 lb-ft at 1119 rpm
Torque Rise: Observed torque increases across various engine speeds, peaking at 242.6 lb-ft.

Overall Efficiency

Fuel Efficiency at Standard PTO Speed: 10.95 Hp.hr/gal (0.553 lb/hp.hr) at 2000 rpm under rated load conditions
Fuel Consumption at Varying Loads: Fuel usage averages around 2.781 Gal/hr with a fuel efficiency of 10.93 Hp.hr/gal (0.554 lb/hp.hr)

NTTL.(1955).Nebraska Tractor Test No. 541 for Oliver Super 66. Lincoln, NE:Nebraska Tractor Test Laboratory. Retrieved from https://digitalcommons.unl.edu/tractormuseumlit/525