Gibson I
The Gibson I is a tractor produced by Gibson. It is equipped with a 236.7 ci 3.9 L engine. The rated power output is 41.03 hp 30.6 kW. Transmission: 4 forward and 1 reverse. Operating weight: 4000 to 4512 pounds.
Engine Power
41.03 hp
30.6 kW
Fuel & Capacities
20 gal
75.7 L
Transmission
4 forward and 1 reverse
Operating Weight
4000 to 4512 pounds
Gibson I Serial Number & Year Decoder
Find the exact manufacture year of your tractor by checking your chassis serial number below.
Where to Find the Serial NumberThe serial number plate is commonly located on the front frame, tractor transmission housing (right side), or instrument panel badge.
Overview
 | 1948 - 1952
Row-Crop tractor |
|---|---|
1948 - 1952 | |
Row-Crop tractor | |
Production | |
|---|---|
Manufacturer | Gibson |
Row-Crop tractor | |
Built in Longmont, Colorado, USA | |
Variants | |
|---|---|
I | tricycle-front |
IFA | adjustable wide-front |
IFS | standard front |
Gibson I Engine | |
|---|---|
Hercules 3.9L 6-cyl gasoline | |
Fuel tank | 20 gal
75.7 L |
Engine details ...  | |
Gibson I Transmission | |
|---|---|
4-speed gear | |
Transmission details ...  |
Gibson I Power | |
|---|---|
Plows | 2-3 |
Drawbar (tested) | 29.1 hp
21.7 kW |
PTO (tested) | 36.82 hp
27.5 kW |
Belt (tested) | 41.03 hp
30.6 kW |
Performance test details ...  | |
Mechanical | |
|---|---|
Two-wheel drive | |
Final drives | bull gear |
Manual steering | |
Mechanical band brakes | |
Open operator station. | |
Power Take-off (PTO) | |
|---|---|
Rear PTO | live |
Rear PTO Type | 540 (1.375) |
Dimensions & Tires | |
|---|---|
Wheelbase | 94 inches
238 cm |
Weight | 4000 to 4512 pounds |
Front tire | 5.50-16 |
Rear tire | 10-38 |
Full dimensions and tires ...  | |
Belt Pulley | |
|---|---|
Diameter | 9.2 inches
23 cm |
Width | 7.5 inches
19 cm |
RPM | 1487 |
Speed | 3539 ft/min
1078.69 meters/min |
References | |
|---|---|
 | |
Gibson Tractors - Durability, lower operating costs, plus extra power. published in 1948 |
Engine
Engine Detail — 236.7 ci / 3.9 L Gasoline
Manufacturer | Hercules ZXD |
Fuel Type | Gasoline |
Configuration | 6-cylinder, liquid-cooled |
Displacement | 236.7 ci
3.9 L |
Bore/Stroke | 3.4375x4.125 inches
87 x 105 mm |
Air cleaner | oil bath |
Compression | 6.71:1 |
Rated RPM | 1800 |
Starter volts | 6 |
Coolant capacity | 17 qts
16.1 L |
Transmission
Transmission — 4 forward and 1 reverse gear
Type | gear |
Gears | 4 forward and 1 reverse |
Clutch | 254mm dry disc |
 | |
Dimensions
Gibson I Tires | |
|---|---|
Ag front | 5.50-16 |
Ag rear | 10-38 |
Ag rear | 11-38 |
12-38 | |
Dimensions | |
|---|---|
Wheelbase | 94 inches
238 cm |
Length | 127.25 inches
323 cm |
Height | 67 inches
170 cm |
Ground clearance | 25 inches
63 cm |
Rear tread | 49 to 90 inches
124 to 228 cm |
Gibson I Weight | |
|---|---|
Shipping | 4000 lbs
1814 kg |
Operating | 4512 lbs
2046 kg |
Ballasted | 7495 lbs
3399 kg |
Tests
Nebraska Tractor Test 408 | |
|---|---|
Gasoline 4-speed 2WD
May 8 - 12, 1949
Link: Nebraska Tractor Test 408 file | |
Belt power (max) | 41.03 hp
30.6 kW |
Belt fuel use (max) | 4.2 gal/hour
15.9 l/hour |
PTO performance | |
Power at rated engine speed | 36.82 hp
27.5 kW |
Fuel use | 3.6 gal/hour
13.6 l/hour |
Drawbar performance | |
Max power | 29.1 hp
21.7 kW |
Fuel use | 3.2 gal/hour
12.1 l/hour |
Gear 3 used for power test. | |
Max pull | 4676 lbs
2121 kg |
Gear 2 used for pull test. | |
Photos
Gibson I tractor photo
Related models
Gibson Super D2
- Power:
- 12
- Production years:
- 1950 - 1958
Gibson E
- Power:
- 12
- Production years:
- 1948 - 1952
Gibson H
- Power:
- 27.3
- Production years:
- 1948 - 1952
Gibson D
- Power:
- 6
- Production years:
- 1947 - 1949
Gibson A
- Power:
- 6
- Production years:
- -1 - -1