John Deere 3720
The John Deere 3720 is a tractor produced by John Deere. It is equipped with a 91.5 ci 1.5 L engine. The listed engine power is Diesel (listed): 44 hp / 32.8 kW. Transmission: eHydro AutoHST. Operating weight: 1047 lbs 474 kg.
Engine Power
Diesel (listed): 44 hp / 32.8 kW
Fuel & Capacities
13.5 gal
51.1 L
Transmission
eHydro AutoHST
Operating Weight
1047 lbs
474 kg
Overview
 | 2005 - 2013
3000 Twenty SeriesCompact Utility tractor
3000 Twenty Series
Compact Utility tractor |
|---|
Production | |
|---|---|
Manufacturer | John Deere |
Compact Utility tractor | |
Built in Augusta, Georgia, USA | |
John Deere 3720 Engine | |
|---|---|
Yanmar 1.5L 3-cyl diesel | |
Engine details ...  |
John Deere 3720 Transmission | |
|---|---|
hydrostatic | |
Transmission details ...  |
John Deere 3720 Power | |
|---|---|
Engine | 44 hp
32.8 kW |
Mechanical | |
|---|---|
Four-wheel drive | |
Steering | power |
Wet disc brakes | |
Two-post foldable ROPS. Cab optional. | |
Capacity | |
|---|---|
ROPS Fuel | 13.5 gal
51.1 L |
Cab Fuel | 11.8 gal
44.7 L |
Hydraulic system | 6.8 gal
25.7 L |
Hydraulics | |
|---|---|
Type | open center |
Capacity | 6.8 gal
25.7 L |
Valves | 5 |
Pump flow | 8.6 gpm
32.6 lpm |
Total flow | 13.9 gpm
52.6 lpm |
Tractor hitch | |
|---|---|
Rear Type | I |
Rear lift (at ends) | 2,530 lbs
1147 kg |
Power Take-off (PTO) | |
|---|---|
Rear PTO | independent |
Rear PTO Type | 540 |
Mid PTO | optional |
Mid PTO Type | 2100 |
Dimensions & Tires | |
|---|---|
Wheelbase | 68 inches
172 cm |
Weight | 2900 to 3570 pounds |
Front tire | 7-14 |
Rear tire | 11.2-24 |
Full dimensions and tires ...  | |
Electrical | |
|---|---|
Ground | negative |
ROPS Charging amps | 40 |
Cab Charging amps | 75 |
Battery CCA | 500 |
Battery volts | 12 |
References | |
|---|---|
 | |
Commercial & Consumer Equipment Purchasing Guide published in 2007, by John Deere | |
3000 Series published in 2008, by John Deere | |
3000 Series published in 2009, by John Deere | |
3000 Twenty Series Compact Tractors published in 2005, by John Deere | |
3000 Twenty Series Tractors Product Information Handbook published in 2004, by John Deere | |
TWENTY Series Tractors published in 2010, by John Deere |
Engine
Engine Detail — 91.5 ci / 1.5 L Diesel
Manufacturer | Yanmar 3TNV84HT |
Configuration | turbocharged diesel, 3-cylinder, liquid-cooled |
Displacement | 91.5 ci
1.5 L |
Bore/Stroke | 3.3x3.54 inches
84 x 90 mm |
Power | 44 hp
32.8 kW |
Fuel system | direct injection |
Compression | 18.5:1 |
Rated RPM | 2600 |
Torque | 101.1 lb-ft
137.1 Nm |
Torque RPM | 1560 |
Starter volts | 12 |
Oil capacity | 6 qts
5.7 L |
Coolant capacity | 5.6 qts
5.3 L |
Transmission
Transmission — Sauer-Danfoss eHydro
Transmission | Sauer-Danfoss eHydro |
Type | hydrostatic |
Gears | infinite forward and reverse (3-range) |
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. | |
With 11.2-24 rear tires. | |
 | |
Transmission — eHydro AutoHST
Transmission | eHydro AutoHST |
Type | hydrostatic |
Gears | infinite forward and reverse (3-range) |
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. | |
With 11.2-24 rear tires. | |
 | |
Dimensions
John Deere 3720 Tires | |
|---|---|
Ag front | 7-14 |
Ag rear | 11.2-24 |
Lawn/turf front | 27x8.5-15 |
Lawn/turf rear | 41x14-20 |
Lawn/turf front | 25x10.5LL-15 |
Lawn/turf rear | 41x18LL-16.1 |
Industrial front | 25x8.5-14 |
Industrial rear | 15-19.5 |
Industrial front | 27x8.5-15 |
Industrial rear | 43x16-20 |
Dimensions | |
|---|---|
Wheelbase | 68 inches
172 cm |
Length | 120.2 inches
305 cm |
Width | 52.4 inches*Minimum
133 cm |
Height (hood) | 57 inches
144 cm |
Height (ROPS) | 93.3 inches
236 cm |
ROPS Weight | 2,900 lbs
1315 kg |
Cab Weight | 3,570 lbs
1619 kg |
Clearance (rear axle) | 12.2 inches
30 cm |
Rear tread | 40.6/45.3/48.9/53.1/56.6 inches
103/115/124/134/143 cm |
Attachments
Attachment overview | |
|---|---|
60" mid-mount mower deck | |
John Deere 300X loader | |
John Deere 300CX loader | |
Backhoe |
60" Mower deck | |
|---|---|
Type | mid-mount John Deere |
3-blade | |
Cutting width | 60 inches
152 cm |
John Deere 47 Backhoe | |
|---|---|
Backhoe type | John Deere 47 Backhoe |
Weight | 1047 lbs
474 kg |
2-Foot flat digging depth | 90 inches
228 cm |
Reach from pivot | 114 inches
289 cm |
Loading height | 70 inches
177 cm |
Bucket Rotation | 180° |
Swing Arc | 180° |
Bucket force | 2840 lbs
1288 kg |
Dipperstick force | 2005 lbs
909 kg |
Recommended Implements & Sizing Guide
Engineering recommendations for John Deere 3720 based on its 44 HP power envelope and ASAE agricultural standards.
| Implement & Operation | Recommended Size | Workload Rating | Engineering Notes |
|---|---|---|---|
Moldboard PlowPrimary Tillage | 2 to 3 Bottom (14-16")2 - 3 铧 (35-40 cm) | Medium Duty | Standard utility farm tillage. |
Rotary Cutter / MowerMowing & Clearing | 6 ft (72 in)1.8 m | Medium Duty | Medium pasture clearing; rear slip-clutch recommended. |
Rotary TillerSeedbed Prep | 66 to 72 in165 - 180 cm | Medium Duty | Standard utility tiller; slip clutch protection required. |
Disc HarrowSecondary Tillage | 7 to 8 ft Tandem Disc2.1 - 2.4 m 对开双排耙 | Medium Duty | Field leveling and clod breaking behind plows. |
Hay BalerHay & Forage | Small Square Baler (14x18")小方捆打捆机 (36x46 cm) | Medium Duty | Classic 2-string baler for horse and small livestock hay. |
Sizing & Soil Condition NoteActual implement sizing varies depending on local soil conditions (heavy clay vs sandy loam), field slope, and operating speed. Heavy tillage implements may require front ballast weights and wheel weights.
Fluids, Capacities & Working Autonomy
Standard fluid requirements, service intervals, and continuous runtime estimates for John Deere 3720.
Estimated Continuous Field Runtime: 5.9 hrs
Approximately 5.9 hours of continuous field operation at ~75% rated power on a full tank (13.5 gal / 51.1 L).
Estimated 75% Load Fuel Burn~2.3 gal/hr (8.7 L/hr)
Engine Crankcase Oil
SAE 15W-40 (Heavy Duty Diesel)
Standard Spec: API CK-4 / CJ-4 Heavy Duty
Service Interval: 150 – 250 Hours
Transmission & Hydraulic System
UTTO (Universal Tractor Transmission Oil)
Standard Spec: ISO VG 46 / 68 (Wet Brake & Trans Compatible)
Service Interval: 600 – 1000 Hours
Engine Cooling System
50/50 Ethylene Glycol Pre-mix
Standard Spec: ASTM D6210 / Heavy-Duty OAT Antifreeze
Service Interval: 2 Years / 1500 Hours
John Deere 3720 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for John Deere 3720.
Converted Equivalents:
Horsepower (HP)44 hp
Kilowatts (kW)32.8 kW
Metric Horsepower (PS / CV)44.6 PS
Direct Competitor Comparison
Compare John Deere 3720 against same-era industry alternatives in the same horsepower class.
Current Model
John Deere
John Deere 3720
Engine Power:Diesel (listed): 44 hp / 32.8 kW
★ Baseline Reference
International HarvesterMarket Competitor
International Harvester 383
Engine Power:40
Production Years:1982 - 1984
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