John Deere 4840
The John Deere 4840 is a tractor produced by John Deere. It is equipped with a 466 ci 7.6 L engine. The listed engine power is 180.63 hp 134.7 kW. Transmission: John Deere PowerShift. Operating weight: 14900 to 18000 pounds.
Engine Power
180.63 hp
134.7 kW
Fuel & Capacities
103 gal
389.9 L
Transmission
John Deere PowerShift
Operating Weight
14900 to 18000 pounds
Overview
 | 1978 - 1982
Iron Horses SeriesRow-Crop tractor
Iron Horses Series
Row-Crop tractor |
|---|
Production | |
|---|---|
Manufacturer | John Deere |
Row-Crop tractor | |
Built in Waterloo, Iowa, USA | |
Original price was $57,648 in 1982 | |
John Deere 4840 Engine | |
|---|---|
John Deere 7.6L 6-cyl diesel | |
Engine details ...  |
John Deere 4840 Transmission | |
|---|---|
8-speed full power shift | |
Transmission details ...  |
John Deere 4840 Power | |
|---|---|
Drawbar (claimed) | 157 hp
117.1 kW |
PTO (claimed) | 180 hp
134.2 kW |
Drawbar (tested) | 151.21 hp
112.8 kW |
PTO (tested) | 180.63 hp
134.7 kW |
Performance test details ...  | |
Mechanical | |
|---|---|
Two-wheel drive | |
Differential lock | pedal-actuated hydraulic |
Power steering | |
Differential hydraulic wet disc brakes | |
Sound-Gard cab. | |
Capacity | |
|---|---|
Fuel | 103 gal
389.9 L |
Hydraulic system | 16.5 gal
62.5 L |
Hydraulics | |
|---|---|
Type | closed center |
Capacity | 16.5 gal
62.5 L |
Valves | 2 or 3 |
Pump flow | 23 gpm
87.1 lpm |
Tractor hitch | |
|---|---|
Rear Type | III/IIIN |
Rear lift | 8295 lbs
3762 kg |
Power Take-off (PTO) | |
|---|---|
Rear PTO | independent |
Rear PTO Type | 1000 (1.75) |
Dimensions & Tires | |
|---|---|
Wheelbase | 118.5 inches
300 cm |
Weight | 14900 to 18000 pounds |
Front tire | 11.00-16 |
Rear tire | 18.4-38 |
Full dimensions and tires ...  | |
Electrical | |
|---|---|
Ground | negative |
Charging system | alternator |
Batteries | 2 |
Battery volts | 6 |
References | |
|---|---|
 | |
The New Iron Horses published in 1978, by John Deere | |
Tractors 90 to 180 HP published in 1979, by John Deere | |
Tractors 90, 110, 130, 155, 180 HP published in 1979, by John Deere | |
Row-Crop Tractors Product Information Handbook published in 1977, by John Deere | |
40 Series Row-Crop Tractors Product Information Handbook published in 1982, by John Deere |
Engine
Engine Detail — 466 ci / 7.6 L Diesel
Manufacturer | John Deere |
Configuration | turbocharged intercooled diesel, 6-cylinder, liquid-cooled |
Displacement | 466 ci
7.6 L |
Bore/Stroke | 4.5625x4.75 inches
116 x 121 mm |
Air cleaner | dual paper elements |
Pre-heating | ether injection |
Compression | 15.5:1 |
Rated RPM | 2200 |
Idle RPM | 800-2400 |
Operating RPM | 1500-2200 |
Firing order | 1-5-3-6-2-4 |
Starter volts | 12 |
Coolant capacity | 40 qts
37.9 L |
Transmission
Transmission — John Deere PowerShift
Transmission | John Deere PowerShift |
Type | full power shift |
Gears | 8 forward and 4 reverse |
Oil capacity | 80 qts
75.7 L |
Clutchless shift-on-the-move power shift between all eight forward and four reverse gears. Inching pedal provided for hooking up implements and other precision work. | |
 | |
Dimensions
John Deere 4840 Tires | |
|---|---|
Ag front | 11.00-16 |
Ag rear | 18.4-38 |
Ag front | 10.00-16 |
14L-16.1 | |
16.5L-16.1 | |
9.50-20 | |
Ag rear | 24.5-32 |
30.5-32 | |
20.8-38 | |
18.4-42 | |
Dimensions | |
|---|---|
Wheelbase | 118.5 inches
300 cm |
Length | 177 inches
449 cm |
Width | 96 inches
243 cm |
108 inches (long axle)
274 cm | |
118 inches (long axle)
299 cm | |
Height (cab) | 117 inches
297 cm |
Clearance (front axle) | 26 inches
66 cm |
Clearance (rear axle) | 28 inches
71 cm |
Clearance (drawbar) | 14.9 inches
37 cm |
Rack-and-pinion rear axle | 3.937 by 96 inches
99 by 2438 mm |
Rack-and-pinion rear axle | 3.937 by 108 inches
99 by 2743 mm |
Rack-and-pinion rear axle | 3.937 by 118 inches
99 by 2997 mm |
Front tread | 58 to 100 inches
147 to 254 cm |
Rear tread | 60 to 131.5 inches
152 to 334 cm |
John Deere 4840 Weight | |
|---|---|
Shipping | 14,900 lbs
6758 kg |
Operating | 18,000 lbs
8164 kg |
Ballasted | 20,370 lbs
9239 kg |
Tests
Nebraska Tractor Test 1263 | |
|---|---|
Diesel 8-speed 2WD
November 2 - 12, 1977
Link: Nebraska Tractor Test 1263 file | |
PTO performance | |
Power at rated engine speed | 180.63 hp
134.7 kW |
Fuel use | 11.5 gal/hour
43.5 l/hour |
Power at rated PTO speed | 181.63 hp
135.4 kW |
Fuel use | 11.5 gal/hour
43.5 l/hour |
Drawbar performance | |
Max power | 151.21 hp
112.8 kW |
Fuel use | 11.3 gal/hour
42.8 l/hour |
Gear 4 used for power test. | |
Max pull | 17,307 lbs
7850 kg |
Gear 2 used for pull test. | |
Recommended Implements & Sizing Guide
Engineering recommendations for John Deere 4840 based on its 180.63 HP power envelope and ASAE agricultural standards.
| Implement & Operation | Recommended Size | Workload Rating | Engineering Notes |
|---|---|---|---|
Moldboard PlowPrimary Tillage | 5 to 7 Bottom (18")5 - 7 铧 (45 cm) | Commercial / Field Scale | Large acreage tillage; requires front ballast weights. |
Rotary Cutter / MowerMowing & Clearing | 15 to 20 ft Batwing4.6 - 6.1 m 宽幅折叠翼 | Commercial / Field Scale | Large commercial field and roadside mowing operations. |
Rotary TillerSeedbed Prep | 90 to 120 in Heavy Duty230 - 300 cm 重型旋耕机 | Commercial / Field Scale | Deep intensive seedbed preparation for commercial row crops. |
Disc HarrowSecondary Tillage | 15 to 22 ft Folding Disc4.5 - 6.7 m 折叠式圆盘耙 | Commercial / Field Scale | Wide commercial field leveling; requires hydraulic remotes. |
Hay BalerHay & Forage | Large Square Baler (3x4 or 4x4)大方捆商用打捆机 (1.2x1.2 m) | Commercial / Field Scale | High-capacity commercial forage harvesting (1000 RPM PTO). |
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 4840.
Estimated Continuous Field Runtime: 11 hrs
Approximately 11 hours of continuous field operation at ~75% rated power on a full tank (103 gal / 389.9 L).
Estimated 75% Load Fuel Burn~9.4 gal/hr (35.6 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 4840 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for John Deere 4840.
Converted Equivalents:
Horsepower (HP)180.6 hp
Kilowatts (kW)134.7 kW
Metric Horsepower (PS / CV)183.1 PS
Direct Competitor Comparison
Compare John Deere 4840 against same-era industry alternatives in the same horsepower class.
Current Model
John Deere
John Deere 4840
Engine Power:180.63 hp
134.7 kW
★ Baseline Reference
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