| Manufacturer | Gibson |
| Price | - |
| Model | I |
| Equipment Type | - |
| Factory | Longmont, Colorado, USA |
VARIANTS
| I | tricycle-front |
| IFA | adjustable wide-front |
| IFS | standard front |
NEBRASKA TRACTOR TEST 408
| Description | Gasoline /May 1949/PTO performance/Drawbar performance |
| Power at rated engine speed | 36.8 hp/27.4 kW |
| Fuel use | 3.2 gal/hour/12.1 l/hour |
| Max power | 29.1 hp/21.7 kW |
GIBSON I POWER
| Plows | 2-3 |
| Drawbar (tested) | 29.1 hp/21.7 kW |
| PTO (tested) | 36.8 hp/27.4 kW |
ENGINE DETAIL
The Gibson I tractor features a Hercules QXLD engine with a 6-cylinder configuration, achieving a displacement of 236.7 cubic inches (3.9 liters) conducive for robust performance at a rated RPM of 1800. The 6.71:1 compression ratio enhances fuel efficiency but may limit power output compared to higher ratios; the gasoline engine is suited for lighter agricultural tasks or harrowing. The 6-volt starter indicates simplicity in design, though potential cold weather starting issues may arise if not adequately maintained.
| Description | Hercules QXLD/gasoline/6-cylinder |
| Displacement | 236.7 ci/3.9 L |
| Bore/Stroke | 3.4375x4.125 inches/87 x 105 mm |
| Compression | 6.71:1 |
| Rated RPM | 1800 |
| Starter volts | 6 |
| Coolant capacity | 16 qts/15.1 L |
GIBSON I ENGINE
The Gibson I tractor is powered by a Hercules 3.9L 6-cylinder gasoline engine, offering robust performance for agricultural applications. With a fuel tank capacity of 20 gallons (75.7 liters), it provides sufficient operating range for extended fieldwork, though fuel efficiency should be monitored to avoid frequent refueling. Potential challenges may include higher operating costs due to gasoline consumption compared to diesel alternatives, particularly in large-scale operations.
| Description | Hercules 3.9L 6-cyl gasoline |
| Fuel tank | 20 gal/75.7 L |
TRANSMISSION
The Gibson I tractor features a simple transmission system with 4 forward gears and 1 reverse gear, allowing for adequate speed control in various agricultural tasks. The limited number of gears can provide ease of operation for novice users but may restrict versatility in more demanding terrain or applications. Optimal scenarios for this tractor include flat, open fields where straightforward maneuverability is sufficient.
| Transmission | gear |
| Gears | 4 forward and 1 reverse |
MECHANICAL
The Gibson I tractor features a 4x2 2WD chassis, which offers simplicity and reduced weight, making it ideal for light farming tasks. Manual steering may present challenges in maneuverability, especially in tight spaces or uneven terrain, but can provide a more direct connection to the vehicle. Its 4-speed transmission allows for a good balance between available power and speed, suitable for basic field operations but may lack versatility in more demanding conditions.
| Chassis | 4x2 2WD |
| Steering | manual |
| Transmission | 4-speed |
GIBSON I TIRES
The Gibson I tractor features an Ag front wheel size of 5.50x16, providing good maneuverability and stability for narrower rows, while the Ag rear size of 12.00x38 offers traction suitable for heavier loads and fieldwork. This configuration is advantageous for diversified farming operations requiring both agility and power. However, the challenge lies in ensuring compatibility with various implements due to the non-standard tire sizes, which could limit options for certain attachments.
| Ag front | 5.50x16 |
| Ag rear | 12.00x38 |
DIMENSIONS
| Wheelbase | 94 inches/238 cm |
| Length | 127.25 inches/323 cm |
| Height | 67 inches/170 cm |
| Weight | 4,512 lbs/2046 kg |
DIMENSIONS & TIRES
The Gibson I tractor exhibits a wheelbase of 94 inches, which enhances stability during operation, particularly in fieldwork situations requiring maneuverability. Weighing 4,512 lbs, its substantial mass provides good traction under various soil conditions, although it may present challenges in transportability and urban use. The tire specifications, 5.50x16 in the front and 12.00x38 in the rear, suggest the tractor is optimized for heavy-duty agricultural tasks, effectively managing soil compaction and reducing turf damage.
| Wheelbase | 94 inches/238 cm |
| Weight | 4,512 lbs/2046 kg |
| Front tire | 5.50x16 |
| Rear tire | 12.00x38 |