| Manufacturer | Allis Chalmers |
| Price | 7,169(USD) |
| Model | D15 |
| Equipment Type | Row-Crop Tractors |
| Factory | West Allis, Wisconsin, USA |
NEBRASKA TRACTOR TEST 795
| Description | Gasoline 8-speed 2WD May 12 - 23, 1961 Link: Nebraska Tractor Test 795 file PTO performance Drawbar performance Gear 3-Low used for power test. Gear 1-Low used for pull test. |
| Power at rated engine speed | 40.00hp / 29.8kW |
| Fuel use | 3.4gal/hour / 12.9l/hour |
| Power at rated PTO speed | 33.85hp / 25.2kW |
| Max power | 35.33hp / 26.3kW |
| Max pull | 5,605lbs / 2542kg |
NEBRASKA TRACTOR TEST 796
| Description | Diesel 8-speed 2WD May 12 - 26, 1961 Link: Nebraska Tractor Test 796 file PTO performance Drawbar performance Gear 3-Low used for power test. Gear 1-Low used for pull test |
| Power at rated engine speed | 36.51hp / 27.2kW |
| Fuel use | 3.0gal/hour / 11.4l/hour |
| Power at rated PTO speed | 34.36hp / 25.6kW |
| Max power | 33.32hp / 24.8kW |
| Max pull | 5,737lbs / 2602kg |
NEBRASKA TRACTOR TEST 797
| Description | LP gas 8-speed 2WD May 12 - 26, 1961 Link: Nebraska Tractor Test 797 file PTO performance Drawbar performance Gear 3-Low used for power test. Gear 1-Low used for pull test |
| Power at rated engine speed | 37.44hp / 27.9kW |
| Fuel use | 4.0gal/hour / 15.1l/hour |
| Power at rated PTO speed | 30.83hp / 23.0kW |
| Max power | 33.21hp / 24.8kW |
| Max pull | 5,668lbs / 2571kg |
ALLIS CHALMERS D15 POWER
| Drawbar (claimed) | 35.33hp / 26.3kW |
| PTO (claimed) | 40.0hp / 29.8kW |
| Plows | 3 |
| Drawbar (tested) | 35.33hp / 26.3kW |
| PTO (tested) | 40.00hp / 29.8kW |
ENGINES OVERVIEW
The Allis Chalmers D15 features a choice of powertrains: a 2.4L 4-cylinder gasoline engine, a 2.4L 4-cylinder LP gas engine, or a more robust 2.9L 4-cylinder diesel engine. The gasoline option offers quicker starting and lower initial costs, while the LP gas variant provides cleaner combustion and reduced emissions. The diesel engine, although typically more expensive, excels in torque delivery and fuel efficiency, making it ideal for heavy-duty tasks and extended operational periods.
| Description | Allis Chalmers 2.4L 4-cyl gasoline Allis Chalmers 2.4L 4-cyl LP gas Allis Chalmers 2.9L 4-cyl diesel |
ENGINE DETAIL 1
The Allis Chalmers D15 features a reliable 4-cylinder gasoline engine with a displacement of 149 ci (2.4L) that operates efficiently at 2000 RPM, generating a moderate fuel consumption rate of 3.373 gal/hour (12.8 L/hour). Its oil bath air cleaner ensures stable filtration under varying conditions, though maintenance may increase over time. With a compression ratio of 7.75:1, this tractor is well-suited for general agricultural tasks, but it may present challenges in colder climates due to its ignition and compression characteristics, necessitating attention to spark plug and point clearances for optimal performance.
| Description | Allis Chalmers gasoline 4-cylinder liquid-cooled |
| Displacement | 149ci / 2.4L |
| Bore/Stroke | 3.50x3.875inches / 89x 98 mm |
| Fuel use | 3.373gal/hour / 12.8l/hour |
| Air cleaner | oil bath |
| Compression | 7.75:1 |
| Rated RPM | 2000 |
| Firing order | 1-2-4-3 |
| Starter volts | 12 |
| Sparkplug gap | 0.025inches / 0.635 mm |
| Point gap | 0.022inches / 0.559 mm |
| Intake valve clearance | 0.009inches / 0.229 mm hot |
| Exhaust valve clearance | 0.015inches / 0.381 mm hot |
ENGINE DETAIL 2
The Allis Chalmers D15 features a 149 cubic inch (2.4L) LP gas 4-cylinder engine, with a compression ratio of 8.9:1, providing reliable torque for agricultural tasks. With a fuel consumption rate of approximately 3.992 gallons/hour (15.1 l/hour), efficiency may be a concern during prolonged operations; however, LP gas can offer cleaner emissions compared to diesel alternatives. The tractor operates optimally at a rated RPM of 2000, making it suitable for tasks requiring moderate power without excessive fuel consumption.
| Description | Allis Chalmers LP gas 4-cylinder liquid-cooled |
| Displacement | 149ci / 2.4L |
| Bore/Stroke | 3.50x3.875inches / 89x 98 mm |
| Fuel use | 3.992gal/hour / 15.1l/hour |
| Air cleaner | oil bath |
| Compression | 8.9:1 |
| Rated RPM | 2000 |
| Firing order | 1-2-4-3 |
| Starter volts | 12 |
ENGINE DETAIL 3
The Allis Chalmers D-175 is a diesel tractor with a robust 2.9L engine offering a 15.35:1 compression ratio, providing efficient power at a rated RPM of 2000. Its oil bath air cleaner enhances engine longevity by effectively managing dust and debris, although maintenance may be more labor-intensive than dry filters. The fuel consumption of 2.871 gallons per hour indicates a moderate rate, making it suitable for operations requiring consistent power, though fuel efficiency could be a concern for longer tasks.
| Description | Allis Chalmers D-175 diesel 4-cylinder liquid-cooled |
| Displacement | 175ci / 2.9L |
| Bore/Stroke | 3.5625x4.375inches / 90x 111 mm |
| Fuel use | 2.871gal/hour / 10.9l/hour |
| Air cleaner | oil bath |
| Compression | 15.35:1 |
| Rated RPM | 2000 |
| Firing order | 1-3-4-2 |
| Starter volts | 12 |
| Coolant capacity | 11qts / 10.4L |
| Intake valve clearance | 0.010inches / 0.254 mm (hot) |
| Exhaust valve clearance | 0.019inches / 0.483 mm (hot) |
ENGINE OIL
The Allis Chalmers D15 has an oil capacity of 5 quarts (4.7 liters), which is relatively low, making it easier and cost-effective for routine oil changes. Ensure proper oil viscosity to maintain optimal engine performance, especially under varying load conditions. Limitations in oil capacity may necessitate more frequent monitoring and maintenance, particularly in demanding agricultural or industrial applications.
| Oil capacity | 5 qts /4.7 L |
ALLIS CHALMERS D15 ENGINES
The Allis Chalmers D15 tractor is equipped with three engine options: a 2.4L 4-cylinder gasoline engine, a 2.4L 4-cylinder LP gas engine, and a more powerful 2.9L 4-cylinder diesel engine. The gasoline variant offers ease of startup and operation, while the LP gas engine provides cleaner emissions and lower operational costs. The diesel engine, although more robust for heavy-duty tasks, can present challenges such as cold starting and higher maintenance requirements, making it ideal for demanding scenarios like plowing or hauling.
| Description | Allis Chalmers 2.4L 4-cyl gasoline Allis Chalmers 2.4L 4-cyl LP gas Allis Chalmers 2.9L 4-cyl diesel |
TRANSMISSIONS OVERVIEW
The Allis Chalmers D15 features an 8-speed partial power shift transmission, allowing for seamless shifting between gears under load, which enhances efficiency in varying field conditions. This system provides a good balance between speed and torque, making it suitable for a range of agricultural tasks. However, operators may face a learning curve to master the power shift mechanics, especially in complex terrains where precision is crucial.
| Description | 8-speed partial power shift 4-speed |
TRANSMISSION 1
The Allis Chalmers D15 tractor features a partial power shift transmission with 8 forward and 2 reverse gears, enabling flexible operation for various field tasks. A key advantage is the ability to shift the Power Director on the move, enhancing productivity, but the requirement to stop and engage the clutch for gear selection can be a limitation during dynamic operations. Notably, placing the Power Director in neutral allows for stopping the tractor while maintaining PTO engagement, providing efficiency in specific scenarios.
| Transmission | Power Director |
| Type | partial power shift |
| Gears | 8 forward and 2 reverse |
| Oil capacity | 14.75qts / 14.0L/SAE80EP |
| Description | The transmission is controlled by means of the gear shift lever and the Power Director lever. The tractor must be stopped, and clutch used, to select one of four forward gears, or reverse. The Power Director lever has high, low, and neutral positions. The Power Director can be shifted on the move without clutching. Placing the Power Director into neutral causes the tractor to stop while keeping the PTO engaged. |
SPEEDS
| Description | With 12.4-26 rear tires |
TRANSMISSION 2
The Allis Chalmers D15 features a shuttle transmission with 4 forward and reverse gears, allowing for efficient direction changes without using the clutch—ideal for tasks requiring frequent starts and stops. However, the necessity to stop the tractor to change gears limits operational fluidity during continuous tasks. The PTO running at 875 RPMs is advantageous for specific applications but may require consideration of compatibility with various implements.
| Transmission | shuttle |
| Gears | 4 forward and reverse |
| Oil capacity | 14.75qts / 14.0L/SAE80EP |
| Description | The shuttle transmission is controlled using the gear shift lever and the shuttle control lever. The tractor must be stopped, and clutch used, to select one of four speeds with the gear shift. The shuttle control lever enables a shift between forward, reverse, or neutral without clutching. A PTO could be ordered on the industrial D15 with the shuttle, but it ran at 875 RPMs. |
MECHANICAL
The Allis Chalmers D15 features a 4x2 2WD chassis, making it suitable for light to moderate agricultural tasks but limiting performance on uneven terrain. Its steering system can be manual or power-assisted, enhancing operator comfort during prolonged use, although the manual option may result in operator fatigue. The 8-speed partial power shift transmission provides versatility in speed control, allowing for improved efficiency in various applications, though the open operator station may expose the operator to weather elements.
| Chassis | 4x2 2WD |
| Steering | manual/power optional |
| Brakes | expanding shoe |
| Cab | Open operator station |
| Transmissions | 8-speed partial power shift/4-speed |
CAPACITY
| Fuel | 16gal / 60.6L (gas/diesel)/15.75gal / 59.6L (LP gas) |
| Hydraulic system | 2.5gal / 9.5L |
HYDRAULICS
| Capacity | 2.5gal / 9.5L |
| Pressure | 2300psi / 158.6bar |
TRACTOR HITCH
| Rear Type | II/I |
| Type | Snap-Coupler |
POWER TAKE-OFF (PTO)
| Rear PTO | live |
| Rear RPM | 540 |
ALLIS CHALMERS D15 TIRES
The Allis Chalmers D15 tractor features a versatile tire configuration with agricultural front tires sized 6.00-16 and rear options of 13.6-26 or 14.9-26, enhancing traction and stability during field operations. This setup is advantageous for a range of tasks, offering good flotation and reduced soil compaction, crucial for crop productivity. However, the choice of rear tire width may influence maneuverability in tight spaces, making it essential to consider specific operational conditions when selecting tire sizes.
| Ag front | 6.00-16 |
| Ag rear | 13.6-26/14.9-26 |
DIMENSIONS
| Wheelbase | 88inches / 223cm |
| Length | 130.4inches / 331cm |
| Width | 67inches / 170cm |
| Height (hood) | 57.3inches / 145cm |
| Height (exhaust) | 80.2inches / 203cm |
| Clearance (front axle) | 21.2inches / 53cm |
| Clearance (rear axle) | 24.4inches / 61cm |
| Front tread | 51 to 78inches / 129to 198 cm |
| Rear tread | 54 to 88inches / 137to 223 cm (wide axle) |
ALLIS CHALMERS D15 WEIGHT
| Operating | 3,985lbs / 1807kg (gas)/4,036lbs / 1830kg (LP gas)/4,220lbs / 1914kg (diesel) |
| Ballasted | 7,575lbs / 3436kg |
DIMENSIONS & TIRES
The Allis Chalmers D15 tractor features a compact wheelbase of 88 inches, providing enhanced maneuverability in tight spaces, ideal for small farms or gardening tasks. Weighing between 3,985 to 4,220 pounds, this tractor offers a balance between stability and agility, making it suitable for various agricultural applications. The 5.50-16 front tires and 12.4-26 rear tires ensure adequate traction and load distribution, although their size may limit performance in extremely rough or muddy terrain.
| Wheelbase | 88inches / 223cm |
| Weight | 3985 to 4220 pounds |
| Front tire | 5.50-16 |
| Rear tire | 12.4-26 |
D15 SERIAL NUMBERS
| Location | Torque housing |
| 1960 | 1001 |
| 1961 | 1900 |
| 1962 | 6470 |
| Final | 8169 |
BELT PULLEY
| Diameter | 9 inches /22 cm |
| Width | 6.5625inches / 16cm |
| RPM | 1678 |
| Speed | 3956ft/min / 1205.79 meters/min |
ELECTRICAL
| Ground | positive |
| Batteries | 1 (gas/LP)/2 (diesel) |
| Battery volts | 12 |
| Battery AH | 70 |