| Manufacturer |
John Deere |
| Price |
3,700(USD) |
| Model |
720 |
| Equipment Type |
Row-Crop Tractors |
| Factory |
Waterloo, Iowa, USA |
ENGINES OVERVIEW
The John Deere 720 tractor features multiple engine options, including a 5.9L 2-cylinder gasoline, all-fuel, and LP gas variants, as well as a 6.2L 2-cylinder diesel. The versatility in fuel options allows for operational flexibility depending on fuel availability and cost considerations, making it suitable for various agricultural scenarios. However, while the gasoline and LP gas models are easier to start and maintain, the diesel variant offers increased torque and fuel efficiency, especially for heavy-duty applications.
| Description |
John Deere 5.9L 2-cyl gasoline John Deere 5.9L 2-cyl all-fuel John Deere 5.9L 2-cyl LP gas John Deere 6.2L 2-cyl diesel |
ENGINE DETAIL 1
The John Deere 720 features a 2-cylinder, 4-valve gasoline engine with a robust displacement of 5.9L, making it capable of handling moderate agricultural tasks efficiently. Its lower compression ratio of 6.14:1 may lead to reduced power output, but the reliable electric starter and oil bath air cleaner enhance operational convenience and engine longevity. Ideal for small to medium-scale farming operations, this tractor offers a balance of simplicity and durability, although it may struggle with high-demand tasks due to its lower rated RPM of 1125.
| Description |
John Deere gasoline 2-cylinder 4-valve liquid-cooled |
| Displacemen |
360.5ci / 5.9L |
| Bore/Strok |
6.00x6.375inches / 152x 162 mm |
| Air cleane |
oil bath |
| Compressio |
6.14:1 |
| Rated RP |
1125 |
| Firing orde |
1-2 |
| Starter typ |
electric |
| Coolant capacit |
29qts / 27.4L |
ENGINE DETAIL 2
The John Deere 720, a liquid-cooled, all-fuel tractor, features a robust 360.5 ci (5.9L) 2-cylinder engine with a 4-valve configuration, providing reliable power and efficiency for various agricultural tasks. With a low compression ratio of 4.91:1, it can efficiently operate on multiple fuel types, but the rated RPM of 1125 may limit maximum operational speed compared to modern tractors. The oil-bath air cleaner enhances filtration under dusty conditions, reducing maintenance needs, though the electric starter system may require attention in colder environments.
| Description |
John Deere all-fuel 2-cylinder 4-valve liquid-cooled |
| Displacemen |
360.5ci / 5.9L |
| Bore/Strok |
6.00x6.375inches / 152x 162 mm |
| Air cleane |
oil bath |
| Compressio |
4.91:1 |
| Rated RP |
1125 |
| Firing orde |
1-2 |
| Starter typ |
electric |
ENGINE DETAIL 3
The John Deere 720 features a 5.9L LP gas 2-cylinder engine, optimized for low RPM operation at a rated speed of 1125 RPM, promoting fuel efficiency and reduced emissions. With a robust bore and stroke of 6.00x6.375 inches, this tractor may offer sufficient torque for agricultural applications, although the lower compression ratio of 7.94:1 may limit overall performance compared to higher compression engines. The electric starter system operating at 12 volts enhances reliability in starting, making it suitable for varied agricultural environments.
| Description |
John Deere LP gas 2-cylinder 4-valve liquid-cooled |
| Displacemen |
360.5ci / 5.9L |
| Bore/Strok |
6.00x6.375inches / 152x 162 mm |
| Air cleane |
oil bath |
| Compressio |
7.94:1 |
| Rated RP |
1125 |
| Firing orde |
1-2 |
| Starte |
electric |
| Starter volt |
12 |
ENGINE DETAIL 4
The John Deere 720 tractor features a powerful 6.2L diesel engine, boasting a high compression ratio of 16:1 for enhanced thermal efficiency, making it suitable for demanding agricultural tasks. Its unique dual starting options—both a 6V pony motor and a 24V electric starter—allow for reliable cold starts in various climates, although the pony motor may require more maintenance. While the 720 excels in torque delivery due to its 2-cylinder configuration, operators should be aware of the potential for vibration and noise at lower RPMs, particularly when working at its rated RPM of 1125.
| Description |
John Deere diesel 2-cylinder 4-valve liquid-cooled |
| Displacemen |
376ci / 6.2L |
| Bore/Strok |
6.125x6.375inches / 156x 162 mm |
| Compressio |
16:1 |
| Rated RP |
1125 |
| Firing orde |
1-2 |
| Starte |
pony motor *Four-cylinder 6V electric-start gasoline pony power used to warm and start the diesel engine./electric *Electric start became available as an option on the 720 Diesel in 1958. |
| Starter volt |
6 (diesel pony)/24 (diesel electric) |
JOHN DEERE 720 ENGINES
The John Deere 720 features versatile fuel options, including gasoline, all-fuel, LP gas, and diesel engines, making it adaptable for various farming operations. Its auxiliary fuel capacities vary significantly based on the fuel type, which can impact operational range; for example, the all-fuel version has a smaller auxiliary tank (1 gal) compared to LP gas (33 gal). While the 720’s multi-fuel capability allows for flexibility, the challenge lies in managing fuel types and potential performance differences across them, requiring careful planning depending on the task and location.
| Description |
John Deere 5.9L 2-cyl gasoline John Deere 5.9L 2-cyl all-fuel John Deere 5.9L 2-cyl LP gas John Deere 6.2L 2-cyl diesel |
| Fuel tan |
24.5 gal (all-fuel)/92.7 L/26.5 gal (gasoline)/100.3 L/33 gal (LP gas)/124.9 L/20 gal (diesel)/75.7 L |
| Aux. fue |
1 gal (all-fuel)/3.8 L/0.25 gal (diesel)/0.9 L |
TRANSMISSION
The John Deere 720 tractor features a dry clutch and an unsynchronized gear system, which may offer simplicity and reduced weight but can lead to challenges in gear shifting, especially under load. With 6 forward and 1 reverse gear ratios, it provides decent versatility for various applications, though limited gear options may affect performance in diverse terrain. The recommended SAE 80 oil at low temperatures (0°F/-17°C) ensures optimal lubrication, crucial for engine reliability in colder climates.
| Manufacture |
John Deere |
| Typ |
unsynchronized gear |
| Gear |
6 forward and 1 reverse |
| Clutc |
dry |
| Oil capacit |
30qts / 28.4L |
| 0oF [-17oC] |
: SAE 80 |
SPEEDS
| Description |
With 13.6-38 rear tires |
JOHN DEERE 720 TRANSMISSION
The John Deere 720 features a 6-speed unsynchronized gear transmission, allowing for straightforward shifting but may present challenges when changing gears under load. This design provides reliability and ease of maintenance, though it requires operator skill for smooth operation. It's ideal for farmers seeking a durable, low-tech solution for various field tasks, but less suitable for applications demanding rapid shifting or specialized gear ratios.
| Description |
6-speed unsynchronized gear |
MECHANICAL
The John Deere 720 features a two-wheel drive system which enhances traction on flat terrains but may struggle in muddy or uneven conditions. Its mechanical expanding shoe brakes provide reliable stopping power, though they require regular maintenance for optimal performance. The open operator station offers ease of access and visibility, but may expose the operator to weather elements, making a powered steering option advantageous for extended use.
| Description |
Two-wheel drive Differential mechanical expanding shoe brakes Open operator station |
| Steerin |
manual/power OptOptional |
HYDRAULICS
TRACTOR HITCH
POWER TAKE-OFF (PTO)
| Rear PT |
live |
| Rear RP |
540 (1.375) |
JOHN DEERE 720 TIRES
The John Deere 720 features a front tire size of 6.00-16 and rear tire size of 12-38, providing optimal traction and stability for various agricultural tasks. The larger rear tires can enhance pulling power and improve field performance, particularly in heavy tillage operations. However, the relatively narrow front tires may affect steering in muddy conditions, necessitating careful handling in such scenarios.
| Ag fron |
6.00-16 |
| Ag rea |
12-38 |
DIMENSIONS & TIRES
The John Deere 720's wheelbase of 93.7 inches offers stability during agricultural operations, though its relatively heavy weight of 6,790 lbs can affect mobility in challenging terrain. The front tire size (6.00-16) supports maneuverability, while the larger rear tires (12-38) enhance traction and power transfer to the ground—ideal for plowing or heavy tillage. However, the tractor's weight may pose a challenge on soft or loose soil conditions, potentially causing soil compaction.
| Wheelbas |
93.7inches / 237cm |
| Weigh |
6790lbs / 3079kg |
| Front tir |
6.00-16 |
| Rear tir |
12-38 |
720 SERIAL NUMBERS
720 SERIAL LOCATION
| Description |
Right side of tractor in front of and below pulley |
ELECTRICAL
| Groun |
positive *Positive ground for the 6V and 12V systems./floating *The 24V electric-start diesel is not chassis grounded, with both sides of the battery system connected to the starter. The lights and gauges are split on two 12V systems. |
| Charging syste |
generator |
| Batterie |
1 (diesel pony)/2 (gas/LP)/4 (diesel electric) |
| Battery volt |
6 |
