Engine

The engine is a John Deere turbocharged diesel 6-cylinder liquid-cooled inline with a displacement of 414ci / 6.8L. It has a bore/stroke of 4.19x5.00inches / 106x 127mm and a compression ratio of 17:1. The engine is capable of producing a rated power of 167.6hp / 125.0kW at 2100 rpm and a maximum power of 179.7hp / 134.0kW. The firing order is 1-5-3-6-2-4 and the starter volts are 12. The engine has an oil capacity of 27.5qts / 26.0L and a coolant capacity of 33.8qts / 32.0L.


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Transmission

The transmission details are not specified in the provided.

Brakes

The brakes are hydraulic wet disc brakes. The tractor has two- or four-wheel drive and comes with power steering. The John Deere 7720 model has a cab standard. The engine produces a rated power of 167.6hp / 125.0kW at 2100 rpm and a maximum power of 179.7hp / 134.0kW.



Steering

The steering is a John Deere 6.8L 6-cylinder diesel engine. The tractor comes with power steering and has a cab standard. The engine produces a rated power of 167.6hp / 125.0kW at 2100 rpm and a maximum power of 179.7hp / 134.0kW.


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Common Problems

Users have reported issues with the hydraulic system of the John Deere 7720 model. Some users have also reported problems with the transmission. The brakes have also been reported to wear out quickly, leading to reduced stopping power. Additionally, some users have reported issues with the engine overheating and losing power.

What Users Like

Users appreciate the standard tires that come with the John Deere 7720 model. The front tires are 11.00-16 and the rear tires are 18.4R42 for 2WD and 14.9R30 for 4WD. Users also like the power steering and the cab standard, which provides a comfortable and safe working environment. The engine produces a rated power of 167.6hp / 125.0kW at 2100 rpm and a maximum power of 179.7hp / 134.0kW, which provides ample power for most tasks.

Techincal Specifications

Engine Detail

DescriptionJohn Deere turbocharged diesel 6-cylinder liquid-cooled inline
Displacement414ci / 6.8L
Bore/stroke4.19x5.00inches / 106x 127mm
Rated Power (ece R24)167.6hp / 125.0kW
Rated Power (ec 97/98)172.9hp / 128.9kW
Maximum Power (ece R24)179.7hp / 134.0kW
Maximum Power (ec 97/68)185.1hp / 138.0kW
Compression17:1
Rated Rpm2100
Idle Rpm875-2200
Firing Order1-5-3-6-2-4
Starter Volts12
Oil Capacity27.5qts / 26.0L
Coolant Capacity33.8qts / 32.0L

Engine

DescriptionJohn Deere 6.8L 6-cyl diesel

Mechanical

DescriptionTwo- or four-wheel drive Power steering Hydraulic wet disc brakes Cab standard

Tires

Standard Tires (ag)Front: 11.00-16. Rear: 18.4R42 (2WD) Front: 14.9R30. Rear: 18.4R42 (4WD)

Dimensions And Tires

Wheelbase112.6inches / 286cm
Weight15501 to 17033 pounds
Front Tire11.00-16
Rear Tire18.4R42 (2WD)

Capacity

Fuel103.5gal / 391.7L 94.7gal (with right step) / 358.4L
Hydraulic System28.5gal / 107.9L
Front Axle15.2qts / 14.4L
Front Hub2qts / 1.9L
Hd Front Hub4qts / 3.8L

Hydraulics

Typeclosed-center pressure-flow compensated (PFC)
Capacity28.5gal / 107.9L
Pressure3046psi / 210.0bar
Valves7
Pump Flow32.2gpm / 121.9lpm
Scv Flow30gpm / 113.6lpm

Tractor Hitch

Rear Type3/3N
Rear Lift10050lbs / 4558kg 14000lbsOptOptional / 6350kg

Electrical

Groundnegative
Charging Systemalternator
Charging Amps150
Batteries2
Battery Cca925
Battery Volts12

Power Take Off Pto

Rear Ptoindependent
Clutchhydraulic wet discs
Rear Rpm540/1000 (1.375)
Engine Rpm540@1950 / 1000@1950 / 540E@1750 / 1000E@1750
Front Ptoindependent OptOptional
Front Rpm1000 (1.375)

Transmissions

Description16-speed partial power shift 20-speed infinitely variable transmission

Serial Location

DescriptionOn tractor frame, front right-hand side