John Deere 1840
The John Deere 1840 is a tractor produced by John Deere. It is equipped with a 239 ci 3.9 L engine. The listed engine power is Diesel (net): 70 hp / 52.2 kW. Transmission: Hi-Lo. Operating weight: 5476 lbs 2483 kg.
Engine Power
Diesel (net): 70 hp / 52.2 kW
Fuel & Capacities
25.1 gal
95.0 L
Transmission
Hi-Lo
Operating Weight
5476 lbs
2483 kg
Overview
 | 1979 - 1982
Utility tractor |
|---|
Production | |
|---|---|
Manufacturer | John Deere |
Utility tractor | |
Built in Mannheim, Baden-Württemberg, Germany | |
The Canadian-market 1840 is similar to the US 2440 model. | |
John Deere 1840 Engine | |
|---|---|
John Deere 3.9L 4-cyl diesel | |
Fuel tank | 25.1 gal
95.0 L |
Engine details ...  | |
John Deere 1840 Power | |
|---|---|
Engine (net) | 70 hp
52.2 kW |
PTO (claimed) | 60 hp
44.7 kW |
Mechanical | |
|---|---|
Two- or four-wheel drive | |
Final drives | planetary |
Differential lock | mechanical rear |
Power steering | |
Wet disc brakes | |
Open operator station. Cab optional. | |
Hydraulics | |
|---|---|
Type | closed center |
Tractor hitch | |
|---|---|
Rear Type | II/I |
Control | position and draft control |
Power Take-off (PTO) | |
|---|---|
Rear PTO | independent |
Rear PTO Type | 540 (1.375) |
540/1000 (1.375) | |
Dimensions & Tires | |
|---|---|
Wheelbase | 89.7 inches
227 cm |
Weight | 5476 lbs
2483 kg |
Front tire | 7.50-16 |
Rear tire | 15.5-38 |
Full dimensions and tires ...  | |
Electrical | |
|---|---|
Ground | negative |
Charging system | alternator |
Charging amps | 33 |
55 *Standard with cab, optional on open station. | |
Charging volts | 14 |
Batteries | 2 |
Battery volts | 12 |
References | |
|---|---|
 | |
Operator's Manual 145 Loader (OMW21474) | |
Operator's Manual 1640, 1840 and 2040 Tractors published by John Deere | |
New Profiles of Performance published in 1979, by John Deere |
Engine
Engine Detail — 239 ci / 3.9 L Diesel
Manufacturer | John Deere |
Fuel Type | Diesel |
Configuration | 4-cylinder, liquid-cooled |
Displacement | 239 ci
3.9 L |
Bore/Stroke | 4.19x4.33 inches
106 x 110 mm |
Power (net) | 70 hp
52.2 kW |
Compression | 16.8:1 |
Rated RPM | 2500 |
Idle RPM | 800-2660 |
Operating RPM | 1300-2500 |
Torque | 170 lb-ft
230.5 Nm |
Torque RPM | 1300 |
Firing order | 1-3-4-2 |
Starter volts | 12 |
Intake valve clearance | 0.014 inches
0.356 mm |
Exhaust valve clearance | 0.018 inches
0.457 mm |
Transmission
Transmission options | |
|---|---|
8-speed unsynchronized gear | |
8-speed partially synchronized | |
16-speed two-speed power shift |
Transmission — 8 forward and 4 reverse unsynchronized gear
Type | unsynchronized gear |
Gears | 8 forward and 4 reverse |
Clutch | dry disc |
Four gears in two ranges, plus reverse range. | |
With 15.5-38 rear tires. | |
 | |
Transmission — Top-Shaft Synchronized
Transmission | Top-Shaft Synchronized |
Type | partially synchronized |
Gears | 8 forward and 4 reverse |
Four synchronized gears in two ranges, plus reverse range. | |
Transmission — Hi-Lo
Transmission | Hi-Lo |
Type | two-speed power shift |
Gears | 16 forward and 8 reverse |
Dimensions
John Deere 1840 Tires | |
|---|---|
Ag front | 7.50-16 |
Ag rear | 15.5-38 |
Ag rear | 16.9-30 |
Dimensions | |
|---|---|
Wheelbase | 89.7 inches
227 cm |
Length | 147 inches
373 cm |
Height (hood) | 62 inches
157 cm |
Weight | 5476 lbs
2483 kg |
Recommended Implements & Sizing Guide
Engineering recommendations for John Deere 1840 based on its 70 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 | 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 | 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 1840.
Estimated Continuous Field Runtime: 6.9 hrs
Approximately 6.9 hours of continuous field operation at ~75% rated power on a full tank (25.1 gal / 95 L).
Estimated 75% Load Fuel Burn~3.6 gal/hr (13.8 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 1840 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for John Deere 1840.
Converted Equivalents:
Horsepower (HP)70 hp
Kilowatts (kW)52.2 kW
Metric Horsepower (PS / CV)71 PS
Direct Competitor Comparison
Compare John Deere 1840 against same-era industry alternatives in the same horsepower class.
Current Model
John Deere
John Deere 1840
Engine Power:Diesel (net): 70 hp / 52.2 kW
★ Baseline Reference
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