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 rated power output is 180.63 hp 134.7 kW. Transmission: John Deere PowerShift. Operating weight: 14900 to 18000 pounds.

Overview

	1978 - 1982 Iron Horses SeriesRow-Crop tractor
1978 - 1982
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.