| Manufacturer |
John Deere |
| Price |
- |
| Model |
3720 |
| Equipment Type |
Compact Utility Tractors |
| Factory |
Augusta, Georgia, USA |
ENGINE DETAIL
The John Deere 3720 features a Yanmar 3-cylinder turbocharged diesel engine with a displacement of 1.5L, providing 44hp at a rated RPM of 2600, and delivering a peak torque of 101.1 lb-ft at 1560 RPM. Its direct injection fuel system and high compression ratio of 18.5:1 enhance fuel efficiency and power delivery, making it suitable for medium-duty tasks like tilling and mowing. However, potential challenges include managing coolant and oil capacities of 5.3L and 5.7L respectively, which may necessitate more frequent maintenance during heavy use.
| Description |
Yanmar 3TNV84HT turbocharged diesel 3-cylinder liquid-cooled |
| Displacement |
91.5ci / 1.5L |
| Bore/Stroke |
3.3x3.54inches / 84x 90mm |
| Power |
44hp / 32.8kW |
| Fuel system |
direct injection |
| Compression |
18.5:1 |
| Rated RPM |
2600 |
| Torque |
101.1lb-ft / 137.1Nm |
| Torque RPM |
1560 |
| Starter volts |
12 |
| Oil capacity |
6qts / 5.7L |
| Coolant capacity |
5.6qts / 5.3L |
JOHN DEERE 3720 ENGINE
The John Deere 3720 tractor is powered by a Yanmar 1.5L 3-cylinder diesel engine, which enhances fuel efficiency while providing adequate torque for a variety of agricultural tasks. Its compact size allows for maneuverability in tight spaces, making it ideal for small to medium-sized farms or landscaping projects. However, users should consider potential limitations in power compared to larger tractors when tackling heavier tasks or extensive areas.
| Description |
Yanmar 1.5L 3-cyl diesel |
TRANSMISSION 1
The John Deere 3720 features a Sauer-Danfoss eHydro hydrostatic transmission, enabling infinite forward and reverse speeds with three selectable ranges, enhancing versatility in various field conditions. Key advantages include user-friendly control with foot pedals and integrated cruise control, allowing for precise speed management, while features like SpeedMatch and LoadMatch optimize performance for different loads and terrain. However, the requirement to stop the tractor before shifting ranges may pose a challenge in tight operations, potentially reducing efficiency in dynamic environments.
| Transmission |
Sauer-Danfoss eHydro |
| Type |
hydrostatic |
| Gears |
infinite forward and reverse (3-range) |
| Description |
Controlled by two foot pedals and range shift lever. Tractor must be stopped before shifting ranges. Cruise control standard. SpeedMatch allows maximum speed to be limited. MotionMatch allows acceleration rate to be set. LoadMatch allows engine RPMs to be set, tractor will adjust speed to maintain RPMs |
SPEEDS 1
| Description |
With 11.2-24 rear tires |
TRANSMISSION 2
The John Deere 3720's eHydro AutoHST transmission offers seamless infinite forward and reverse operation, enhancing user-friendliness through a single foot pedal control for engine RPMs and speed management. This hydrostatic system allows for precise maneuverability, making it ideal for varied applications such as mowing, tilling, or loader work. However, while this setup promotes ease of operation, it may lead to higher maintenance costs compared to gear-driven systems due to its complex hydraulic components.
| Transmission |
eHydro AutoHST |
| Type |
hydrostatic |
| Gears |
infinite forward and reverse (3-range) |
| Description |
AutoHST provides an automobile-style control to the eHydro transmission. A single foot pedal controls engine RPMs and transmission speed, with a column-mounted shifter to select forward, neutral, or reverse |
SPEEDS 2
| Description |
With 11.2-24 rear tires |
JOHN DEERE 3720 TRANSMISSION
The John Deere 3720 tractor features a hydrostatic transmission, providing seamless speed control and ease of operation, especially beneficial for tasks requiring precision, such as mowing or loader work. This type of transmission offers reduced mechanical complexity and enhances operator comfort by eliminating the need for constant clutching. However, hydrostatic systems may experience lower efficiency in high-torque situations and can have higher maintenance costs over time compared to traditional gear-based systems.
MECHANICAL
The John Deere 3720 tractor features four-wheel drive for enhanced traction in various terrains, making it suitable for both agricultural and landscaping applications. Its wet disc brake system offers superior stopping power and reduced maintenance compared to traditional brakes, though it may incur higher initial costs. The optional cab adds comfort and protection from the elements, beneficial for long operating hours in challenging weather conditions.
| Description |
Four-wheel drive Wet disc brakes Two-post foldable ROPS. Cab optional |
| Steering |
power |
CAPACITY
| ROPS Fuel |
13.5gal / 51.1L |
| Cab Fuel |
11.8gal / 44.7L |
| Hydraulic system |
6.8gal / 25.7L |
HYDRAULICS
| Type |
open center |
| Capacity |
6.8gal / 25.7L |
| Valve |
5 |
| Pump flow |
8.6gpm / 32.6lpm |
| Total flow |
13.9gpm / 52.6lpm |
TRACTOR HITCH
| Rear Type |
I |
| Rear lift (at ends) |
2,530lbs / 1147kg |
POWER TAKE-OFF (PTO)
| Rear PTO |
independent |
| Rear RPM |
540 |
| Mid PTO |
optional |
| Mid RPM |
2100 |
JOHN DEERE 3720 TIRES
The John Deere 3720 features versatile tire options, allowing it to adapt for agricultural, lawn/turf, or industrial applications. The Ag configuration offers robust traction with sizes suitable for field operations, while the lawn/turf setup minimizes ground disturbance and is ideal for landscaping tasks. Key considerations include the appropriate tire selection based on intended use to optimize performance and ensure stability across varying tasks.
| Ag front |
7-14 |
| Ag rear |
11.2-24 |
| Lawn/turf front |
25x10.5LL-15 |
| Lawn/turf rear |
41x18LL-16.1 |
| Industrial front |
27x8.5-15 |
| Industrial rear |
43x16-20 |
DIMENSIONS & TIRES
The John Deere 3720 tractor, with a wheelbase of 68 inches, offers excellent maneuverability, making it suitable for tight spaces in landscaping and small-scale farming. Weighing between 2,900 to 3,570 pounds, it provides a solid base for various attachments, though the weight may affect transportability across softer terrains. The front tire size of 7-14 and rear tire size of 11.2-24 contributes to good traction and stability, but users should be cautious of tire wear when operating under heavy loads.
| Wheelbase |
68inches / 172cm |
| Weight |
2900 to 3570 pounds |
| Front tire |
7-14 |
| Rear tire |
11.2-24 |
3720 SERIAL NUMBERS
3720 SERIAL LOCATION
| Description |
Serial number plate above front axle of the John Deere 3720 on right side of tractor |
ELECTRICAL
| Ground |
negative |
| ROPS Charging amps |
40 |
| Cab Charging amps |
75 |
| Battery CCA |
500 |
| Battery volts |
12 |
