John Deere 3420
The John Deere 3420 is a tractor produced by John Deere. It is equipped with a 302.7 ci 5.0 L engine. The listed engine power is Diesel (listed): 77 hp / 57.4 kW. Transmission: Syncro-Range. Operating weight: 7668 lbs 3478 kg.
Engine Power
Diesel (listed): 77 hp / 57.4 kW
Fuel & Capacities
34.1 gal
129.1 L
Transmission
Syncro-Range
Operating Weight
7668 lbs
3478 kg
Overview
 | 1970 - 1975
Row-Crop tractor |
|---|
Production | |
|---|---|
Manufacturer | John Deere |
Row-Crop tractor | |
Built in Rosario, Argentina | |
John Deere 3420 Engine | |
|---|---|
John Deere 5.0L 6-cyl diesel | |
Fuel tank | 34.1 gal
129.1 L |
Engine details ...  | |
John Deere 3420 Transmission | |
|---|---|
8-speed | |
Transmission details ...  |
John Deere 3420 Power | |
|---|---|
Engine | 77 hp
57.4 kW |
Mechanical | |
|---|---|
Two-wheel drive | |
Final drives | planetary |
Power steering | |
Hydraulic wet disc brakes | |
Open operator station. | |
Hydraulics | |
|---|---|
Type | closed center |
Tractor hitch | |
|---|---|
Rear Type | II |
Power Take-off (PTO) | |
|---|---|
Rear PTO | independent |
Rear PTO Type | 540 |
Dimensions & Tires | |
|---|---|
Wheelbase | 100.4 inches
255 cm |
Weight | 7668 lbs
3478 kg |
Front tire | 6.00x16 |
Rear tire | 18.4x34 |
Full dimensions and tires ...  | |
Electrical | |
|---|---|
Charging system | alternator |
Charging amps | 28 |
Batteries | 2 |
Battery volts | 6 |
Engine
Engine Detail — 302.7 ci / 5.0 L Diesel
Manufacturer | John Deere |
Fuel Type | Diesel |
Configuration | 6-cylinder, liquid-cooled inline |
Displacement | 302.7 ci
5.0 L |
Bore/Stroke | 4.016x4.331 inches
102 x 110 mm |
Power | 77 hp
57.4 kW |
Air cleaner | dry |
Compression | 16.7:1 |
Rated RPM | 2500 |
Torque | 221 lb-ft
299.7 Nm |
Torque RPM | 1250 |
Starter volts | 12 |
Transmission
Transmission — Syncro-Range
Transmission | Syncro-Range |
Gears | 8 forward and 2 reverse |
With 18.4x34 rear tires. | |
 | |
Dimensions
John Deere 3420 Tires | |
|---|---|
Ag front | 6.00x16 |
Ag rear | 18.4x34 |
Ag front | 7.50x18 |
Ag rear | 13.6x38 |
15.5x38 | |
23.1x26 | |
Dimensions | |
|---|---|
Wheelbase | 100.4 inches
255 cm |
Length | 161 inches
408 cm |
Height (hood) | 67.3 inches
170 cm |
Height (exhaust) | 88.2 inches
224 cm |
Shipping weight | 7668 lbs
3478 kg |
Ground clearance | 13.4 inches
34 cm |
Recommended Implements & Sizing Guide
Engineering recommendations for John Deere 3420 based on its 77 HP power envelope and ASAE agricultural standards.
| Implement & Operation | Recommended Size | Workload Rating | Engineering Notes |
|---|---|---|---|
Moldboard PlowPrimary Tillage | 3 to 4 Bottom (16")3 - 4 铧 (40 cm) | Heavy Duty | Suitable for medium loam and stubble turnover. |
Rotary Cutter / MowerMowing & Clearing | 7 to 8 ft (84-96 in)2.1 - 2.4 m | Heavy Duty | Heavy-duty twin spindle cutter for overgrown acreage. |
Rotary TillerSeedbed Prep | 78 to 84 in200 - 215 cm | Heavy Duty | Heavy commercial tiller with multi-speed gearbox. |
Disc HarrowSecondary Tillage | 10 to 14 ft Tandem / Offset3.0 - 4.2 m 重型交错耙 | Heavy Duty | Aggressive residue cutting in corn/cotton stubble. |
Hay BalerHay & Forage | 4x4 to 4x5 Round Baler1.2x1.5 m 紧凑圆捆机 | Heavy Duty | Silage and dry hay; 540 RPM PTO with slip-clutch. |
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 3420.
Estimated Continuous Field Runtime: 8.5 hrs
Approximately 8.5 hours of continuous field operation at ~75% rated power on a full tank (34.1 gal / 129.1 L).
Estimated 75% Load Fuel Burn~4 gal/hr (15.2 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 3420 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for John Deere 3420.
Converted Equivalents:
Horsepower (HP)77 hp
Kilowatts (kW)57.4 kW
Metric Horsepower (PS / CV)78.1 PS
Direct Competitor Comparison
Compare John Deere 3420 against same-era industry alternatives in the same horsepower class.
Current Model
John Deere
John Deere 3420
Engine Power:Diesel (listed): 77 hp / 57.4 kW
★ Baseline Reference
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