John Deere

John Deere 4840

The John Deere 4840 is a row-crop tractor produced from 1978 to 1982 as part of the Iron Horses Series. Built in Waterloo, Iowa, USA, it features a turbocharged intercooled 7.6L 6-cylinder diesel engine delivering up to 180 hp PTO power. The tractor includes an 8-speed full power shift transmission, two-wheel drive, differential lock, power steering, and a Sound-Gard cab. It has a fuel capacity of 103 gallons and a hydraulic system capacity of 16.5 gallons. Dimensions include a 118.5 inch wheelbase, 177 inch length, and operating weight up to 18,000 lbs. The 4840 supports a rear hitch lift capacity of 8295 lbs and an independent 1000 RPM rear PTO. It was originally priced at $57,648 in 1982.

Power200 hp[P]

Founded1978 - 1982

Model4840

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Technical Specifications

Detailed specifications and technical data for John Deere 4840

Power

PTO (tested)	180.63 hp (134.7 kW)
PTO (claimed)	180 hp (134.2 kW)
Drawbar (tested)	151.21 hp (112.8 kW)
Drawbar (claimed)	157 hp (117.1 kW)

Tires

Ag rear	18.4-38, 24.5-32, 30.5-32, 20.8-38, 18.4-42
Ag front	11.00-16, 10.00-16, 14L-16.1, 16.5L-16.1, 9.50-20

Engine

Type	turbocharged intercooled diesel
Cooling	liquid-cooled
Idle RPM	800-2400
Cylinders	6-cylinder
Rated RPM	2200
Air cleaner	dual paper elements
Bore/Stroke	4.5625x4.75 inches (116 x 121 mm)
Pre-heating	ether injection
Displacement	466 ci (7.6 L)
Firing order	1-5-3-6-2-4
Manufacturer	John Deere
Operating RPM	1500-2200
Starter volts	12
Coolant capacity	40 qts (37.9 L)
Compression ratio	15.5:1

Weight

Shipping	14,900 lbs (6758 kg)
Ballasted	20,370 lbs (9239 kg)
Operating	18,000 lbs (8164 kg)

Capacity

Fuel	103 gal (389.9 L)
Hydraulic system	16.5 gal (62.5 L)

Dimensions

Width	96 inches (243 cm)
Length	177 inches (449 cm)
Wheelbase	118.5 inches (300 cm)
Rear tread	60 to 131.5 inches (152 to 334 cm)
Front tread	58 to 100 inches (147 to 254 cm)
Height (cab)	117 inches (297 cm)
Clearance (drawbar)	14.9 inches (37 cm)
Clearance (rear axle)	28 inches (71 cm)
Clearance (front axle)	26 inches (66 cm)
Rack-and-pinion rear axle	3.937 by 96 inches (99 by 2438 mm), 3.937 by 108 inches (99 by 2743 mm), 3.937 by 118 inches (99 by 2997 mm)
Width (long axle options)	108 inches (274 cm), 118 inches (299 cm)

Electrical

Ground	negative
Batteries	2
Battery volts	6
Charging system	alternator

Hydraulics

Type	closed center
Valves	2 or 3
Capacity	16.5 gal (62.5 L)
Pump flow	23 gpm (87.1 lpm)

Mechanical

Cab	Sound-Gard cab
Drive	Two-wheel drive
Brakes	Differential hydraulic wet disc brakes
Power steering	Yes
Differential lock	pedal-actuated hydraulic

Production

Type	Row-Crop tractor
Series	Iron Horses Series
Built in	Waterloo, Iowa, USA
Original price	$57,648 in 1982
Years produced	1978 - 1982

Transmission

Type	John Deere PowerShift
Gears	8 forward and 4 reverse
Features	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.
Description	full power shift
Oil capacity	80 qts (75.7 L)

Tractor hitch