John Deere

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.
Power37 hp
Founded1976 - 1986
Model840

Technical Specifications

Detailed specifications and technical data for John Deere 840

Power
Engine37.5 hp (28.0 kW)
PTO (claimed)33.5 hp (25.0 kW)
Tires
Ag rear12.4-32, 9.5-36, 12.4-28
Ag front6.50-16
Engine
TypeJohn Deere 2.9L 3-cyl diesel
Power37.5 hp (28.0 kW)
DetailsJohn Deere diesel 3-cylinder liquid-cooled
Rated RPM2400
Bore/Stroke4.19x4.33 inches (106 x 110 mm)
Compression16.8:1
Fuel systemdirect injection
Displacement179 ci (2.9 L)
Oil capacity7.4 qts (7.0 L)
Operating RPM1300-2400
Starter power4 hp (3.0 kW)
Starter volts12
Coolant capacity11.1 qts (10.5 L)
Capacity
Fuel20.6 gal (78.0 L)
Hydraulic system10.8 gal (40.9 L)
Dimensions
Width65.4 inches (166 cm)
Length138 inches (350 cm)
Wheelbase74.4 inches (188 cm)
Rear tread53.5 to 73.2 inches (135 to 185 cm)
Front tread49.6 to 79.5 inches (125 to 201 cm)
Height (ROPS)94.1 inches (239 cm)
Shipping weight5004 lbs (2269 kg)
Height (exhaust)103.1 inches (261 cm)
Clearance (front axle)21 inches (53 cm)
Electrical
Groundnegative
Batteries2
Battery volts12
Charging amps33
Charging systemalternator
Hydraulics
Typeclosed center
Capacity10.8 gal (40.9 L)
Pump flow6.1 gpm (23.1 lpm)
Mechanical
ROPSFour-post ROPS
DriveTwo-wheel drive
BrakesHydraulic wet disc brakes
SteeringManual steering
Final drivesplanetary
Production
Built inMannheim, Baden-Württemberg, Germany
CategoryUtility tractor
Years produced1976 - 1986
Transmission
Options8-speed collar shift, 16-speed two-speed power shift
Collar shift
Typecollar shift
Gears8 forward and 4 reverse
Clutchdry disc
Two-speed power shift
Typetwo-speed power shift
Gears16 forward and 8 reverse
Tractor hitch
Rear TypeII/I
Rear lift4878 lbs (2212 kg)
Power Take-off (PTO)
Clutchdry disc
Rear PTOlive
Front PTOoptional
Rear PTO Type540
Front PTO Type1000
Clutch optionalwet disc Optional, independent PTO
Rear PTO optionalindependent Optional
Engine RPM (rear PTO)540@2400
Engine RPM (front PTO)1000@2070