| Manufacturer | John Deere |
| Price | 1,000(USD) |
| Model | D |
| Equipment Type | Standard-Tread Tractors |
| Factory | Waterloo, Iowa, USA |
ENGINES OVERVIEW
The John Deere D tractor features a robust 7.6L or 8.2L 2-cylinder all-fuel engine configuration, optimizing fuel versatility for various operational needs. Its design enables efficient power delivery, making it suitable for both agricultural and industrial applications, though limited torque at lower RPMs may challenge performance in heavy-load scenarios. Overall, the dual engine options provide flexibility, allowing users to select the best fit for their specific tasks while benefiting from John Deere's reliable engineering.
| Description | John Deere 7.6L 2-cyl all fuel John Deere 8.2L 2-cyl all fuel |
ENGINE DETAIL 1
The John Deere D tractor features a robust 2-cylinder design with a substantial displacement of 465ci (7.6L), providing adequate torque for agricultural applications. With a low compression ratio of 3.91:1 and an operating RPM of only 800, it is optimized for fuel efficiency but may lack power for demanding tasks. Its 52-quart coolant capacity enhances thermal management, making it suitable for extended operation in varied field conditions, although the limited RPM might restrict high-speed applications.
| Description | John Deere all fuel 2-cylinder liquid-cooled/Used from beginning until 1927, S/N 53388 |
| Displacement | 465ci / 7.6L |
| Bore/Stroke | 6.50x7.00inches / 165x 178mm |
| Compression | 3.91:1 |
| Rated RPM | 800 |
| Firing order | 1-2 |
| Coolant capacity | 52qts / 49.2L |
ENGINE DETAIL 2
The John Deere D tractor features a robust 501ci (8.2L) 2-cylinder engine, delivering high torque at a low rated RPM of 900, which is beneficial for heavy-duty farming applications. Its low compression ratio of 3.91:1 allows for the use of various fuel types, enhancing versatility but may limit power efficiency compared to modern engines. A notable challenge is its oil and coolant capacities, which necessitate regular maintenance to prevent overheating and ensure optimal performance over sustained operational periods.
| Description | John Deere all fuel 2-cylinder liquid-cooled/The larger 501 cubic inch engine was introduced in 1927, replacing the 465 |
| Displacement | 501ci / 8.2L |
| Bore/Stroke | 6.75x7.00inches / 171x 178mm |
| Compression | 3.91:1 |
| Rated RPM | 900 |
| Firing order | 1-2 |
| Oil capacity | 13qts / 12.3L |
| Coolant capacity | 52qts (early) / 49.2L 56qts (after 1931) / 53.0L |
JOHN DEERE D ENGINES
The John Deere D tractor features two engine options, a 7.6L or 8.2L all-fuel 2-cylinder engine, providing flexibility for various agricultural tasks. Its fuel tank capacity ranges from 18 gallons (68.1L) in early models to 23.5 gallons (88.9L) post-1931, allowing extended operation without frequent refueling. However, potential challenges include the management of differing fuel types and consumption efficiency, necessitating careful selection based on operational needs and conditions.
| Description | John Deere 7.6L 2-cyl all fuel John Deere 8.2L 2-cyl all fuel |
| Fuel tank | 18gal (early) / 68.1L 23.5gal (after 1931) / 88.9L |
| Aux. fuel | 2.5gal (early) / 9.5L 1.5gal (after 1931) / 5.7L |
TRANSMISSIONS OVERVIEW
The John Deere D tractor features a 2-speed unsynchronized gear and a 3-speed unsynchronized gear system, which allows for versatility in operational speed but may present challenges in shifting under load. The unsynchronized gearbox can lead to increased wear over time due to grinding during gear changes, particularly when operating in demanding conditions. For optimal performance, operators should be trained in proper shifting techniques to mitigate wear and enhance efficiency.
| Description | 2-speed unsynchronized gear 3-speed unsynchronized gear |
TRANSMISSION 1
The John Deere D tractor features an unsynchronized transmission with only 2 forward gears and 1 reverse gear, which can limit operational flexibility and speed control under varying load conditions. Its original transmission design, utilized from 1923 to 1935, offers simplicity but may pose challenges in smooth gear shifting and efficiency compared to modern synchronized systems. This configuration is advantageous for basic farming tasks but could be less suitable for applications requiring frequent speed adjustments or complex terrain navigation.
| Type | unsynchronized gear |
| Gears | 2 forward and 1 reverse |
| Description | Original transmission, used from 1923 to 1935 |
TRANSMISSION 2
The John Deere D features a three-speed unsynchronized gear transmission, allowing for 3 forward and 1 reverse gear, which offers versatility in various agricultural tasks. This simplistic design, introduced in 1935, enhances ease of use but may present challenges in precision shifting under load due to lack of synchronization. Ideal for farm operations requiring reliable, straightforward power delivery, it excels in low-speed applications where operator control is paramount.
| Type | unsynchronized gear |
| Gears | 3 forward and 1 reverse |
| Description | Three-speed transmission was introduced in 1935 |
JOHN DEERE D TRANSMISSIONS
The John Deere D tractor features a 2-speed and 3-speed unsynchronized gear system, which allows for flexibility in power management and adaptability to various field conditions. The unsynchronized gears can present challenges in shifting efficiency, potentially leading to wear if not engaged correctly, but they offer robustness for handling heavier loads. Ideal for farming operations requiring frequent gear changes, it may be less suited for high-speed transport due to the gear engagement limitations.
| Description | 2-speed unsynchronized gear 3-speed unsynchronized gear |
MECHANICAL
The John Deere D tractor's two-wheel drive configuration offers excellent maneuverability in flat terrain, making it suitable for smaller fields or homesteads. Its manual steering system may pose challenges in tight turns or lengthy usage, leading to operator fatigue. The open operator station enhances visibility and ventilation but lacks protection from elements, potentially affecting operator comfort during extended work hours.
| Description | Two-wheel drive Manual steering Open operator station with steel pan seat |
POWER TAKE-OFF (PTO)
| Rear PTO | optional |
| Rear RPM | 525 |
JOHN DEERE D TIRES
The John Deere D tractor features robust agricultural tires—front options include 28x5 or 28x6 steel tires and a 7.50x18, while the rear options consist of 46x12 steel or 12.75x28. This configuration provides excellent traction and stability on varying terrains, making it suitable for diverse farming applications. However, the steel construction may lead to a harsher ride on uneven ground and increased soil compaction, necessitating careful operational considerations to mitigate crop damage.
| Ag front | 28x5 (steel) / 28x6 (steel) / 7.50x18 |
| Ag rear | 46x12 (steel) / 12.75x28 |
DIMENSIONS & TIRES
The John Deere D tractor, with a weight range of 4090 to 5880 pounds, provides a robust platform for various farming tasks, benefiting from its balanced weight distribution for stability in the field. Its tire specifications, featuring 28x5 front tires and 46x12 rear tires, enhance traction and load-bearing capacity, suitable for plowing and heavy tillage. However, lower weight may result in reduced traction on soft soil conditions, so optimal tire pressure must be maintained to mitigate slippage during operation.
| Weight | 4090 to 5880 pounds |
| Front tire | 28x5 |
| Rear tire | 46x12 |
D SERIAL NUMBERS
| 1929 | 71645 |
| 1939 | 142300 |
| Final | 143799 |
D SERIAL LOCATION
| Description | Operator's platform, ahead of seat mount |
BELT PULLEY
| Diameter | 13.25inches / 33cm |
| Width | 8.5inches / 21cm |
| RPM | 900 |
| Speed | 3122ft/min / 951.59meters/min |