Oliver OC-18

Last Updated: July 2024

Overview

The Oliver OC-18 is a large diesel-powered tractor, equipped with a Hercules DFXE six-cylinder engine and a gear-driven transmission featuring 4 forward and 2 reverse gears. The engine has a displacement of 895 cubic inches, is liquid-cooled with a vertical I-head (OHV) cylinder orientation, and operates at a rated RPM of 1500. According to independent test results, the engine produces a maximum power of 52.76 HP (39.35 kW) at 1650 rpm and a maximum torque of 314 lb.-ft. (426 Nm) at 1200 rpm. The drawbar performance shows 45.12 HP (33.64 kW) with a drawbar pull of 6570 lbs (29.22 kN) at a speed of 3.14 mph (5.05 km/h). Fuel consumption figures are also provided. The Oliver OC-18 weighs 32,500 pounds and has dimensions of 167.9 inches in length, 111.75 inches in width, and an 83-inch height up to the steering wheel. While some specifications remain unknown, the available information suggests the tractor is built for heavy-duty operations and likely used in large-scale farming or industrial applications.

Key Specifications

Transmission: Gear

Operating Weight: 32500

Fuel Type: Diesel

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Oliver OC-18 Tractor

Technical Specifications

Engine

Manufacturer: Hercules
Model: DFXE
Cooling Type: Liquid
Cylinder Orientation: Vertical I-head
Valve Configuration: Overhead Valve (implied from "I-head")
Fuel Type: Diesel
Induction Type: -
Cylinders: 6
Displacement (ci): 895
Bore (in): 5.625
Stroke (in): 6
Rated RPM: 1500
Power Output (hp): -

Transmission

Type: Gear
Forward Gears: 4
Reverse Gears: 2
Total Gears: -

Dimensions

Length (in): 167.9
Width (in): 111.75
Height (in): 83 (to steering wheel)
Operating Weight (lb): 32500

Power Take-Off (PTO)

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

Miscellaneous

Chassis: -
Drive Type: -
Steering Type: -
Coolant Capacity (qts): 62
Front Tire Diameter (in): -
Front Tire Width (in): -
Rear Tire Diameter (in): -
Rear Tire Width (in): -
Front/Rear Rim Diameter (in): -
Tire Type: -
Manufacture - End Year: -
Hitch Type: -
Hitch Category: Category 3
Hitch Position: -
Hitch Capacity (lb): -
Operator Station Type: -
Starter Type: Electric (inferred from starter volts specification)
Brake Type: -
Hydraulic System Type: -

Test Results

Nebraska Tractor Test Laboratory - Test Date: November 10, 1952

Maximum Power and Fuel Consumption

Maximum Power: 52.76 HP (39.35 kW) at 1650 rpm
Fuel Consumption at Maximum Power: 4.0 Gal/hr (15.14 l/h) with a fuel efficiency of 0.537 lb/hp.hr (0.327 kg/kW.h)

Drawbar Performance

Power at Rated Engine Speed: 45.12 HP (33.64 kW) with a drawbar pull of 6570 lbs (29.22 kN) and a speed of 3.14 mph (5.05 km/h)
Fuel Consumption at Rated Speed: 0.548 lb/hp.hr (0.333 kg/kW.h) with a fuel efficiency of 12.36 Hp.hr/gal (2.44 kW.h/l)

Torque and Engine Performance

Maximum Torque: 314 lb.-ft. (426 Nm) at 1200 rpm
Torque Rise: Not specified

Hydraulic Performance

Maximum Force Exerted: Not specified
Pump Delivery Rate: Not specified
Hydraulic Power: Not specified

Overall Efficiency

Fuel Efficiency at Standard PTO Speed: Not applicable
Fuel Consumption at Standard PTO Speed: Not applicable

NTTL.(1952).Nebraska OECD Tractor test 489 for Oliver OC-18 Diesel. Lincoln, NE: Nebraska Tractor Test Laboratory. Retrieved from https://digitalcommons.unl.edu/tractormuseumlit/518