Tractor · 1957Unverified
Oliver OC-4
Oliver OC-4 — Agricultural Crawler tractor · 30 hp. Reference specifications; pending source verification.
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
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.