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John Deere 840

The John Deere 840 is a utility tractor produced from 1976 to 1986 in Mannheim, Germany. It features a 2.9L 3-cylinder liquid-cooled diesel engine producing 37.5 hp (28.0 kW) with a PTO power of 33.5 hp (25.0 kW). Transmission options include an 8-speed collar shift and a 16-speed two-speed power shift. The tractor has two-wheel drive with planetary final drives, manual steering, hydraulic wet disc brakes, and a four-post ROPS. Fuel capacity is 20.6 gallons (78.0 L) and hydraulic system capacity is 10.8 gallons (40.9 L) with a closed center hydraulic system and 6.1 gpm pump flow. The rear hitch is category II/I with a lift capacity of 4878 lbs (2212 kg). PTO options include live rear PTO with optional independent and wet disc clutches, and an optional front PTO. Dimensions include a 74.4 inch (188 cm) wheelbase, 138 inch (350 cm) length, and 5004 lbs (2269 kg) shipping weight. Tires are 6.50-16 front and various rear sizes. Electrical system features a 12 volt negative ground with alternator charging at 33 amps and two batteries.
John Deere 840tractorutility tractor2.9L diesel engine37.5 hp8-speed collar shift16-speed power shiftPTOhydraulicsdimensions
Power37 hp
Founded1976 - 1986
Model840

Technical Specifications

Detailed specifications and technical data for John Deere 840

Power

Engine:37.5 hp (28.0 kW)
PTO (claimed):33.5 hp (25.0 kW)

Tires

Ag rear:12.4-32, 9.5-36, 12.4-28
Ag front:6.50-16

Engine

Type:John Deere 2.9L 3-cyl diesel
Power:37.5 hp (28.0 kW)
Details:John Deere diesel 3-cylinder liquid-cooled
Rated RPM:2400
Bore/Stroke:4.19x4.33 inches (106 x 110 mm)
Compression:16.8:1
Fuel system:direct injection
Displacement:179 ci (2.9 L)
Oil capacity:7.4 qts (7.0 L)
Operating RPM:1300-2400
Starter power:4 hp (3.0 kW)
Starter volts:12
Coolant capacity:11.1 qts (10.5 L)

Capacity

Fuel:20.6 gal (78.0 L)
Hydraulic system:10.8 gal (40.9 L)

Dimensions

Width:65.4 inches (166 cm)
Length:138 inches (350 cm)
Wheelbase:74.4 inches (188 cm)
Rear tread:53.5 to 73.2 inches (135 to 185 cm)
Front tread:49.6 to 79.5 inches (125 to 201 cm)
Height (ROPS):94.1 inches (239 cm)
Shipping weight:5004 lbs (2269 kg)
Height (exhaust):103.1 inches (261 cm)
Clearance (front axle):21 inches (53 cm)

Electrical

Ground:negative
Batteries:2
Battery volts:12
Charging amps:33
Charging system:alternator

Hydraulics

Type:closed center
Capacity:10.8 gal (40.9 L)
Pump flow:6.1 gpm (23.1 lpm)

Mechanical

ROPS:Four-post ROPS
Drive:Two-wheel drive
Brakes:Hydraulic wet disc brakes
Steering:Manual steering
Final drives:planetary

Production

Built in:Mannheim, Baden-Württemberg, Germany
Category:Utility tractor
Years produced:1976 - 1986

Transmission

Options:8-speed collar shift, 16-speed two-speed power shift

Collar shift

Type:collar shift
Gears:8 forward and 4 reverse
Clutch:dry disc

Two-speed power shift

Type:two-speed power shift
Gears:16 forward and 8 reverse

Tractor hitch

Rear Type:II/I
Rear lift:4878 lbs (2212 kg)

Power Take-off (PTO)

Clutch:dry disc
Rear PTO:live
Front PTO:optional
Rear PTO Type:540
Front PTO Type:1000
Clutch optional:wet disc Optional, independent PTO
Rear PTO optional:independent Optional
Engine RPM (rear PTO):540@2400
Engine RPM (front PTO):1000@2070

Related Models

John Deere 940

Model:940