John Deere 840 Technical specs


Make John Deere
Model 840
Company country United states
Production years From 1976  Until 1986
Tractor type Utility tractor
Fuel diesel
Price -
Total build -
Service repair manual John Deere 840 Manual
AG front tires 6.50-16
AG rear tires 12.4-32
Weight 5004 lbs or 2269 kg
Length 138 inches [350 cm]
Width 65.4 inches [166 cm]
Height 94.1 inches [239 cm]
Wheelbase 74.4 inches [188 cm]
Ground clearance -
Rear tread size 53.5 to 73.2 inches
Front tread size 49.6 to 79.5 inches
Engine size 179 ci or 2.9 L
Number of cylinders 3 cylinders
Horsepower 37.5 hp or 28.0 kW
Power RPM 2400 (rpm)
Engine torque -
Engine torque RPM -
Fuel type diesel
Fuel injection system direct injection
Fuel tank capacity 20.6 gal or 78.0 L
Compression ratio 16.8:1
Bore stroke 4.19x4.33 inches or (106 x 110 mm)
Oil tank capacity 7.4 qts or 7.0 L
Coolant tank capacity 11.1 qts or 10.5 L
Number of batteries 2
Battery voltage 12 V
Electric ground force negative
Electric charging system alternator
Electric charging Amps 33 amps
Engine starter volts 12 V
Parts And Accessories John Deere 840 Parts
Transmission type two-speed power shift
Transmission gears 16 forward and 8 reverse
Clutch system dry disc
Wheel drive 4x2 2WD
Final drive system planetary
Steering system manual
Braking system hydraulic wet disc
Cabin type Four-post ROPS
Hydraulic system closed center
Pump flow rate 6.1 gpm or 23.1 lpm
Hydraulic tank capacity 10.8 gal or 40.9 L
PTO claimed power 33.5 hp or 25.0 kW
PTO engine @RPM 1000@2070 (rpm)
PTO clutch system dry disc
Rear PTO system live
Rear PTO RPM 540 (rpm)
Front PTO system optional
Front PTO RPM 1000 (rpm)
PTO fuel consumption -
Hitch control system -
Rear hitch II/I
Rear hitch lift 4878 lbs or 2212 kg



Detailed review of John Deere 840

John Deere produced its 840 farm tractor model From 1976  Until 1986 in United states with a Four-post ROPS cabin.
Talking dimensions and weight, this model weighs 5004 lbs or 2269 kg has 65.4 inches [166 cm] of width, 138 inches [350 cm] of length and 94.1 inches [239 cm] of height while maintaining a wheelbase of 74.4 inches [188 cm] the front tread is about 49.6 to 79.5 inches while the rear tread is 53.5 to 73.2 inches .
This tractor can fit ag tires of 6.50-16 front and 6.50-16 back .
This John Deere 840 is powerd by a diesel engine it has 179 ci or 2.9 L 3 cylinders ,it can produce 37.5 hp or 28.0 kW at 2400 (rpm), the fuel tank capacity is 20.6 gal or 78.0 L.
This machine has 4x2 2WD wheel drive system,16 forward and 8 reverse transmission system.

- John Deere provided us with the latest version of its 840 service repair manual
- Find All mechanical and electrical parts and accessories of John Deere 840 farm-tractor here