Tractor · 1948Unverified
Gibson I
Gibson I — Row-Crop tractor · 37 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
37 hp
Max power
21.7 kW
Weight
4000 to 4512 pounds
Hover a source tag to verify
Overview
ManufacturerGibsonReference
Row-Crop tractorReference
Built in Longmont, Colorado, USAReference
Two-wheel driveReference
Final drivesbull gearReference
Manual steeringReference
Mechanical band brakesReference
Open operator station.Reference
Variants
Itricycle-frontReference
IFAadjustable wide-frontReference
IFSstandard frontReference
Engine
Hercules 3.9L 6-cyl gasolineReference
Fuel tank75.7 LReference
Plows2-3Reference
Drawbar (tested)21.7 kWReference
Belt (tested)30.6 kWReference
Hercules ZXDReference
gasolineReference
6-cylinderReference
liquid-cooledReference
Displacement3.9 LReference
Bore/Stroke87 x 105 mmReference
Air cleaneroil bathReference
Compression6.71:1Reference
Rated RPM1800Reference
Starter volts6Reference
Coolant capacity16.1 LReference
Belt power (max)30.6 kWReference
Power at rated engine speed27.5 kWReference
Max power21.7 kWReference
Transmission
4-speed gearReference
TypegearReference
Gears4 forward and 1 reverseReference
Clutch254mm dry discReference
PTO & Hydraulics
PTO (tested)27.5 kWReference
Rear PTOliveReference
Rear PTO Type540 (1.375)Reference
Dimensions
Wheelbase238 cmReference
Weight4000 to 4512 poundsReference
Front tire5.50-16Reference
Rear tire10-38Reference
Ag front5.50-16Reference
Ag rear10-38Reference
Ag rear11-38Reference
Ag rear12-38Reference
Length323 cmReference
Height170 cmReference
Ground clearance63 cmReference
Rear tread124 to 228 cmReference
Shipping1814 kgReference
Operating2046 kgReference
Ballasted3399 kgReference
Capacities
Diameter23 cmReference
Width19 cmReference
RPM1487Reference
Speed1078.69 meters/minReference
Test results
Gasoline 4-speed 2WDMay 8 - 12, 1949Link: Nebraska Tractor Test 408 fileReference
Belt fuel use (max)15.9 l/hourReference
PTO performanceReference
Fuel use13.6 l/hourReference
Drawbar performanceReference
Fuel use12.1 l/hourReference
Gear 3 used for power test.Reference
Max pull2121 kgReference
Gear 2 used for pull test.Reference
Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.