| Manufacturer |
Rock Island |
| Price |
- |
| Model |
G2 15-25 |
| Equipment Type |
Standard-Tread Tractors |
| Factory |
Rock Island, Illinois, USA |
NEBRASKA TRACTOR TEST 157 2
| Description |
Kerosene 2-speed 2WD/April 24 - May 3, 1929/Link: Nebraska Tractor Test 157 file/Drawbar performance |
| Belt power (max) |
29.00 hp/21.6 kW |
| Belt fuel use (max) |
3.6 gal/hour/13.6 l/hour |
| Max power |
22.08 hp/16.5 kW |
| Max pull |
2,880 lbs/1306 kg |
NEBRASKA TRACTOR TEST 158 2
| Description |
Gasoline 2-speed 2WD/May 4 - 8, 1929/Link: Nebraska Tractor Test 158 file/Drawbar performance |
| Belt power (max) |
35.69 hp/26.6 kW |
| Belt fuel use (max) |
3.9 gal/hour/14.8 l/hour |
| Max power |
25.50 hp/19.0 kW |
| Max pull |
3,549 lbs/1609 kg |
ROCK ISLAND G2 15-25 POWER
| Drawbar (claimed) |
15 hp/11.2 kW |
| Belt (claimed) |
25 hp/18.6 kW |
| Drawbar (tested) |
25.50 hp/19.0 kW |
| Belt (tested) |
35.69 hp/26.6 kW |
ENGINE DETAIL
The Rock Island G2 15-25 tractor features a Waukesha four-cylinder, liquid-cooled engine with a significant displacement of 326 ci (5.3 L), providing robust torque for agricultural applications. With a bore and stroke of 4.25 x 5.75 inches (108 x 146 mm), it has an emphasis on low-end power, making it suitable for heavy drawbar work at a rated RPM of 1100. However, the kerosene fuel type may limit its versatility in fuel sourcing compared to diesel alternatives, potentially presenting a challenge in certain operational contexts.
| Description |
Waukesha/kerosene/4-cylinder/liquid-cooled |
| Displacement |
326 ci/5.3 L |
| Bore/Stroke |
4.25x5.75 inches/108 x 146 mm |
| Rated RPM |
1100 |
ROCK ISLAND G2 15-25 ENGINE
The Rock Island G2 tractor, powered by a Waukesha 5.3L 4-cylinder kerosene engine, offers a balance of power and fuel efficiency with a standard fuel capacity of 21 gallons and an auxiliary capacity of 3.5 gallons. Its kerosene fuel type enables smooth operation in colder climates but may be less efficient compared to diesel options, especially in high-demand scenarios. Ideal for medium to large agricultural projects, the dual fuel capacity allows for extended operational times, enhancing productivity in the field.
| Description |
Waukesha 5.3L 4-cyl kerosene |
| Fuel tank |
21 gal/79.5 L |
| Aux. fuel |
3.5 gal/13.2 L |
TRANSMISSION
The Rock Island G2 15-25 tractor features an unsynchronized gear transmission, providing a straightforward but potentially challenging shifting experience, especially under load. With only 2 forward gears and 1 reverse, it is best suited for lighter tasks and applications where speed isn't a priority. Operators must be skilled in manual gear engagement to maximize efficiency during operation, particularly when navigating varied terrain.
| Type |
unsynchronized gear |
| Gears |
2 forward and 1 reverse |
MECHANICAL
The Rock Island G2 15-25 tractor features a 4x2 2WD chassis, which is suitable for lighter loads and less challenging terrain, but may struggle on steep or uneven surfaces. With manual steering and an open operator station, operators may experience less comfort during extended use and exposure to the elements, while benefiting from a straightforward, low-maintenance design. The 2-speed unsynchronized gear transmission can be a challenge for operators requiring fluid speed changes, but offers simplicity and durability for farm tasks requiring less frequent shifting.
| Chassis |
4x2 2WD |
| Steering |
manual |
| Cab |
Open operator station. |
| Transmission |
2-speed unsynchronized gear |
DIMENSIONS
DIMENSIONS & TIRES
The Rock Island G2 15-25 tractor, weighing 4,200 lbs (1,905 kg), is suited for light to medium agricultural tasks, providing adequate traction due to its weight. Its relatively low weight enhances maneuverability but may limit its effectiveness in heavy-duty applications or on uneven terrains. The tractor's weight-to-power ratio, crucial for efficient plowing and tilling, should also be considered against the specific soil conditions encountered in your farming scenarios.
