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Years in Production / 1948–1952
Gibson
I
Explore the specifications, hardware, and original references for the Gibson I.
No photo
40hp
Engine estimate · from PTO
2WD Only
Drive
1948–1952
Production years
Gibson
Manufacturer
I / 01
At a glance
Production
Row-Crop tractor
Built in Longmont, Colorado, USA
- Manufacturer
- Gibson
Mechanical
Two-wheel drive
Manual steering
Mechanical band brakes
Open operator station.
- Final Drives
- bull gear
Pto
- Rear Pto
- live
- Rear Type
- 540 (1.375)
Belt Pulley
- Diameter
- 9.2 inches23 cm
- Width
- 7.5 inches19 cm
- Rpm
- 1487
- Speed
- 3539 ft/min1078.69 meters/min
I / 02
Under the hood
Engine Detail
Hercules ZXD
gasoline
6-cylinder
liquid-cooled
- Displacement
- 236.7 ci3.9 L
- Bore Stroke
- 3.4375x4.125 inches87 x 105 mm
- Air Cleaner
- oil bath
- Compression Ratio
- 6.71:1
- Rated Rpm
- 1800
- Starter Volts
- 6
- Coolant Capacity
- 17 qts16.1 L
- Fuel Type
- gasoline
- Cylinders
- 6
- Cooling
- liquid-cooled
Engine Options
Hercules 3.9L 6-cyl gasoline
- Fuel Tank
- 20 gal75.7 L
I / 03
Gears & controls
Transmission
- Transmission Type
- gear
- Gears
- 4 forward and 1 reverse
- Clutch
- 254mm dry disc
I / 04
Size. Stance. Footprint.
Dimensions
- Length
- 127.25 in323 cm
- Height
- 67 in170 cm
- Wheelbase
- 94 in238 cm
- Ground clearance
- 25 in63 cm
- Rear tread
- 49 in124 cm
Dimensions And Tires
- Wheelbase
- 94 inches238 cm
- Weight
- 4000 to 4512 pounds
- Front Tire
- 5.50-16
- Rear Tire
- 10-38
Tires And Tracks
- Front Ag
- 5.50-16
- Rear Ag
- 10-38
- Rear Ag
- 11-38
- Rear Ag
- 12-38
I / 05
Tests (NTTL)
Nebraska Tractor Test 408Nebraska test report ↗
Gasoline 4-speed 2WDMay 8 - 12, 1949
PTO performance
Drawbar performance
Gear 3 used for power test.
Gear 2 used for pull test.
- Id
- 408
- Belt Power Max
- 41.03 hp30.6 kW
- Belt Fuel Use Max
- 4.2 gal/hour15.9 l/hour
- Power At Rated Engine Speed
- 36.82 hp27.5 kW
- Fuel Use
- 3.6 gal/hour13.6 l/hour
- Fuel Use
- 3.2 gal/hour12.1 l/hour
- Max Power
- 29.1 hp21.7 kW
- Max Pull
- 4676 lbs2121 kg