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Tractor · 1957Unverified

Oliver OC-4

Name: Oliver OC-4
Brand: Oliver

Oliver OC-4 — Agricultural Crawler tractor · 30 hp. Reference specifications; pending source verification.

The Oliver OC-4 is a tractor model that produces approximately 30 hp, positioning it at the lower end of its class. In production from 1957 to 1965, this model features a 3-cylinder diesel liquid-cooled engine, paired with a tracked undercarriage and a 4-speed gearbox. The operating weight of the Oliver OC-4 ranges from 4720 to 5000 pounds, and it is suited for operations covering up to 200 acres.

Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.

Rated power

30 hp

Max power

18.0 kW

Weight

4720 to 5000 pounds

Catalogue coverage

Variants represented

Richest spec table

76 rows

Recorded power

30 hp

Transmissions

4-speed gear

Production years

1957-1965

Verified variants

No linked source document is currently displayed; verify critical figures with the manufacturer or dealer.

Hover a source tag to verify

Overview

ManufacturerOliverReference

Agricultural Crawler tractorReference

Built in Cleveland, Ohio, USAReference

DrivecrawlerReference

Variants

OC-4crawlerReference

OC-46loader-crawlerReference

Alftaflex-trackReference

Engine

Hercules 2.1L 3-cyl dieselReference

Herclues 2.1L 3-cyl gasolineReference

Fuel tank41.6 LReference

Engine22.7 kWReference

Gas Drawbar (claimed)17.9 kWReference

Diesel Drawbar (claimed)18.5 kWReference

Gas Belt (claimed)19.7 kWReference

Diesel Belt (claimed)20.4 kWReference

Drawbar (tested)18.0 kWReference

Belt (tested)19.4 kWReference

Hercules DD130Reference

dieselReference

3-cylinderReference

liquid-cooled vertical I-headReference

Displacement2.1 LReference

Bore/Stroke89 x 114 mmReference

Power22.7 kWReference

Air cleaneroil bathReference

Compression14.5:1Reference

Rated RPM1700Reference

Torque130.2 NmReference

Torque RPM1200Reference

Starter volts12Reference

Oil capacity5.4 LReference

Coolant capacity11.4 LReference

Herclues GTO130Reference

gasolineReference

Power22.5 kWReference

Compression6.5:1Reference

Torque131.5 NmReference

Torque RPM1400Reference

Starter volts6Reference

Belt power (max)19.4 kWReference

Max power18.0 kWReference

Belt power (max)18.9 kWReference

Max power17.3 kWReference

Transmission

4-speed gearReference

TypegearReference

Gears4 forward and 1 reverseReference

Clutchdry discReference

PTO & Hydraulics

Rear PTO Type540 (1.375)Reference

Dimensions

Weight4720 to 5000 poundsReference

10-inch tracksReference

Length281 cmReference

Width152 cmReference

Gauge116 cmReference

Gauge78 cmReference

Gauge152 cmReference

Gauge172 cmReference

Gas Shipping2140 kgReference

Diesel Shipping2154 kgReference

Gas Operating2254 kgReference

Diesel Operating2268 kgReference

Oliver OC-4 Tracks

Width25 cmReference

Length on ground142 cmReference

Area on ground0.7 m²Reference

Width30 cmReference

Area on ground0.9 m²Reference

Test results

NTTL 655: diesel 4-speed crawlerReference

NTTL 656: gasoline 4-speed crawlerReference

Diesel 4-speed crawlerJune 5 - 16, 1958Link: Nebraska Tractor Test 655 fileReference

Belt fuel use (max)8.7 l/hourReference

Drawbar performanceReference

Gear 2 used for power test.Reference

Max pull2324 kgReference

Gear 1 used for pull test.Reference

Gasoline 4-speed crawlerJune 5 - 16, 1958Link: Nebraska Tractor Test 656 fileReference

Belt fuel use (max)9.5 l/hourReference

Max pull2261 kgReference

Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.

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