| Manufacturer | Rumely |
| Price | - |
| Model | OilPull K 12/20 |
| Equipment Type | Standard-Tread Tractors |
| Factory | La Porte, Indiana, USA |
NEBRASKA TRACTOR TEST 10
| Description | Kerosene 2-speed 2WD/May 1 - 21, 1920/Link: Nebraska Tractor Test 10 file/Drawbar performance |
| Belt power (max) | 25.87 hp/19.3 kW |
| Belt fuel use (max) | 3.0 gal/hour/11.4 l/hour |
| Max power | 15.02 hp/11.2 kW |
| Max pull | 2780 lbs/1261 kg |
ADVANCE-RUMELY OILPULL K 12/20 POWER
| Engine | 40 hp/29.8 kW |
| Drawbar (claimed) | 12 hp/8.9 kW |
| Belt (claimed) | 20 hp/14.9 kW |
| Drawbar (tested) | 15.02 hp/11.2 kW |
| Belt (tested) | 25.87 hp/19.3 kW |
ENGINE DETAIL
The Rumely OilPull K 12/20 features a robust 2-cylinder, liquid-cooled, horizontal opposed configuration, enhancing thermal efficiency and reducing vibration. With a displacement of 452.4 ci (7.4 L) and a bore/stroke ratio of 6.00x8.00 inches, it delivers 40 hp (29.8 kW) at a low 560 RPM, making it ideal for heavy-load applications and extended operation. However, its reliance on kerosene may pose fuel accessibility challenges, particularly in remote areas, while its design reflects early 20th-century engineering advancements that may limit modern compatibility.
| Description | Rumley/kerosene/2-cylinder/liquid-cooled horizontal opposed |
| Displacement | 452.4 ci/7.4 L |
| Bore/Stroke | 6.00x8.00 inches/152 x 203 mm |
| Power | 40 hp/29.8 kW |
| Rated RPM | 560 |
ADVANCE-RUMELY OILPULL K 12/20 ENGINE
The Rumely OilPull K 12/20 tractor features a robust 7.4L 2-cylinder kerosene engine, providing a balance of power and efficiency for agricultural tasks. Its significant fuel tank capacity of 23 gallons supports extended operation, reducing downtime for refueling, while the 1-gallon auxiliary tank allows for versatility in fuel management. However, the reliance on kerosene may pose challenges in terms of availability and cold-weather performance compared to diesel models.
| Description | Rumley 7.4L 2-cyl kerosene |
| Fuel tank | 23 gal/87.1 L |
| Aux. fuel | 1 gal/3.8 L |
TRANSMISSION
The Rumely OilPull K 12/20 features a sliding gear transmission with 2 forward gears and 1 reverse gear, which provides adequate maneuverability for light to moderate farming tasks. An advantage of this setup is simplicity in operation, although the limited gear selection may pose challenges in navigating varying terrain or heavy loads. This design is ideal for small-scale operations or vintage machinery enthusiasts seeking reliability in flat or gently sloping fields.
| Type | gear |
| Gears | 2 forward and 1 reverse |
MECHANICAL
The Rumely OilPull K 12/20 features a 4x2 2WD chassis, which provides basic maneuverability but may struggle on uneven terrain compared to 4WD designs. Its open operator station enhances operator visibility but lacks protection from the elements, which can impact comfort during prolonged use. The 2-speed gear transmission allows for versatile speed management but may require careful engagement for optimal torque during various field operations.
| Chassis | 4x2 2WD |
| Cab | Open operator station. |
| Transmission | 2-speed gear |
ADVANCE-RUMELY OILPULL K 12/20 TIRES
The Rumely OilPull K 12/20 tractor features a robust track width provided by 44x8 steel front wheels and 64x20 steel rear wheels, which enhances stability and traction on rugged terrain. However, the heavier weight from the steel construction can lead to increased soil compaction, a consideration for sensitive agricultural environments. This tractor is well-suited for large-scale farming operations, where durability and power are critical, though operators should be mindful of its potential impact on soil health when operating in softer conditions.
| Ag front | 44x8 steel |
| Ag rear | 64x20 steel |
DIMENSIONS
| Length | 132 inches/335 cm |
| Width | 64 inches/162 cm |
| Height | 75 inches/190 cm |
| Weight | 6,430 lbs/2916 kg |
DIMENSIONS & TIRES
The Rumely OilPull K 12/20 tractor, weighing 6,430 lbs (2,916 kg), is equipped with oversized rear tires (64x20) that provide enhanced traction and soil penetration, ideal for fieldwork in challenging terrains. However, its narrow front tires (44x8) may limit stability on uneven ground, and the overall heavy weight can affect maneuverability in tighter spaces. This tractor is particularly well-suited for tasks requiring significant pulling power, such as plowing or heavy towing in agricultural applications.
| Weight | 6,430 lbs/2916 kg |
| Front tire | 44x8 |
| Rear tire | 64x20 |
OILPULL K 12/20 SERIAL NUMBERS
| 1918 | 1200 |
| 1919 | 12101 |
| 1920 | 13657 |
| 1921 | 17640 |
| 1922 | 18649 |
| 1923 | 19269 |
| 1924 | 20511 |
| Description | /how to read serial numbers.../ |