| Manufacturer | Advance-Rumely |
| Price | - |
| Model | OilPull M 20/35 |
| Equipment Type | Standard-Tread Tractors |
| Factory | La Porte, Indiana |
ADVANCE-RUMELY OILPULL M 20/35 POWER
| Drawbar (claimed) | 20 hp/14.9 kW |
| Belt (claimed) | 35 hp/26.1 kW |
ENGINE DETAIL
The Advance-Rumely OilPull M 20/35 tractor features a robust 601.4 ci (9.9 L) displacement kerosene engine with a unique 2-cylinder liquid-cooled horizontal opposed configuration, which promotes efficient thermodynamic properties and reduced vibration. With a bore of 6.8125 inches and stroke of 8.25 inches, this tractor delivers a substantial torque curve, making it ideal for heavy-duty agricultural tasks. However, operating at a rated RPM of just 640 may limit its top speed, making it better suited for slow, controlled operations rather than rapid transport scenarios.
| Description | Rumley/kerosene/2-cylinder/liquid-cooled horizontal opposed |
| Displacement | 601.4 ci/9.9 L |
| Bore/Stroke | 6.8125x8.25 inches/173 x 210 mm |
| Rated RPM | 640 |
| Coolant capacity | 52 qts/49.2 L |
ADVANCE-RUMELY OILPULL M 20/35 ENGINE
The Advance-Rumely OilPull M 20/35 tractor features a robust 9.9L 2-cylinder kerosene engine, optimizing fuel efficiency and torque for heavy-duty applications. With a large 25.75-gallon primary fuel tank and an auxiliary tank of 1.25 gallons, it offers extended operational range, making it suitable for longer fieldwork without frequent refueling. However, the reliance on kerosene can pose challenges in terms of fuel availability and cost, particularly in regions where diesel or gas options may be more accessible.
| Description | Rumley 9.9L 2-cyl kerosene |
| Fuel tank | 25.75 gal/97.5 L |
| Aux. fuel | 1.25 gal/4.7 L |
TRANSMISSION
The Advance-Rumely OilPull M 20/35 utilizes a simple gear transmission with three forward gears and one reverse gear, facilitating ease of operation for various agricultural tasks. The limited gear selection may pose challenges in managing speed and torque for diverse terrains, but the robust design provides reliability for heavy-duty work. Ideal for flat farming conditions, this tractor can efficiently pull implements without the need for constant gear shifting.
| Type | gear |
| Gears | 3 forward and 1 reverse |
MECHANICAL
The Advance-Rumely OilPull M 20/35 tractor features a 4x2 2WD chassis, making it ideal for flat terrain but limiting performance in muddy or hilly conditions due to lack of all-wheel drive. Its mechanical rear differential lock enhances traction on uneven surfaces, while the manual steering is straightforward but may require more effort compared to power steering options. The 3-speed transmission allows for versatility in speed management, though operators may miss more modern multi-range transmissions for complex fieldwork.
| Chassis | 4x2 2WD |
| Differential lock | mechanical rear |
| Steering | manual |
| Cab | Open operator station. |
| Transmission | 3-speed gear |
ADVANCE-RUMELY OILPULL M 20/35 TIRES
The Advance-Rumely OilPull M 20/35 features robust steel ag tires (34x7 front and 52x16 rear) that enhance traction and durability, making it suitable for heavy-duty farm operations. However, the weight distribution and tire size may pose challenges in certain terrains, particularly soft or muddy conditions where flotation is critical. This tractor excels in plowing and heavy pulling applications, optimizing torque delivery due to its oil-pull engine design, but operators should be cautious of its turning radius and maneuverability in tight spaces.
| Ag front | 34x7 steel |
| Ag rear | 52x16 steel |
DIMENSIONS
| Length | 151 inches/383 cm |
| Width | 71.5 inches/181 cm |
| Height | 101 inches/256 cm |
| Weight | 8,600 lbs/3900 kg |
DIMENSIONS & TIRES
The Advance-Rumely OilPull M 20/35, weighing 8,600 lbs (3,900 kg), features robust 52x16 rear tires that enhance traction and stability for heavy tillage tasks. Its unique OilPull engine design, utilizing oil as a fuel source, provides a higher thermal efficiency but may lead to complications in fuel sourcing. Ideal for early 20th-century farming operations, it underscores the balance between power output and operational costs, making it a valuable piece for collectors and enthusiasts of vintage agricultural machinery.
| Weight | 8,600 lbs/3900 kg |
| Front tire | 34x7 |
| Rear tire | 52x16 |
OILPULL M 20/35 SERIAL NUMBERS
| 1924 | 1 |
| 1925 | 2 |
| 1926 | 1014 |
| 1927 | 3085 |