John Deere 7720 VS Allis Chalmers HD21 specs comparison
John Deere 7720
General Infos| Make | John Deere |
| Model | 7720 |
| Country | United states |
| Production | From 2004 Until 2007 |
| Price | - |
| Tractor type | Row Crop tractor |
| Fuel | diesel |
| Service repair manual | John Deere 7720 Manual |
Dimensions, sizes and tires
| AG front tires | 11.00-16 |
| AG rear tires | 18.4R4 |
| Lawn front tires | - |
| Lawn rear tires | - |
| Indus front tires | - |
| Indus rear tires | - |
| Weight | 15,501 lbs or 7031 kg |
| Length | 212.2 inches [538 cm] |
| Width | 96 inches [243 cm] (short axle) |
| Height | 125.4 inches [318 cm] |
| Wheelbase | 112.6 inches [286 cm] |
| Ground clearance | - |
| Turning radius | - |
| Rear tread size | - |
| Front tread size | - |
| Turning radius | - |
Horsepower and engin specs
| Engine capacity | 414 ci or 6.8 L |
| Cylinders | 6 cylinders |
| Engine power | - |
| Engine RPM | 2100 (rpm) |
| Torque | - | Torque RPM | - |
| Fuel type | diesel |
| Fuel injection | - |
| Fuel tank size | 103.5 gal or 391.7 L |
| Oil capacity | 27.5 qts or 26.0 L |
| Oil change | - |
| Starter motor | - |
| Starter volts | 12 V |
| Parts And Accessories | John Deere 7720 Parts |
| Batteries number | 2 |
| Batteries voltage | 12 V |
| Battries Amps | - |
| Cold Amps | 925 |
| Ground force | negative |
| Charging system | alternator |
| Charging Volts | - |
| Charging Amps | 150 amps |
| Trans system | AutoPowr IVT |
| Trans type | infinitely variable transmission |
| Trans gears | infinite forward and reverse |
| Clutch system | hydraulic wet discs |
| Wheel drive | 4x2 2WD |
| Final drive | - |
| Steering | hydrostatic power |
| Braking system | hydraulic wet disc |
| Cabin type | Cab standard |
| Differentiel lock | - |
| System | closed-center pressure-flow compensated |
| Valves | 7 |
| Pump flow | 32.2 gpm or 121.9 lpm |
| SVC flow | 30 gpm or 113.6 lpm |
| Steering flow | - |
| Tank capacity | 28.5 gal or 107.9 L |
| Hydraulic pressure | 3046 psi or 210.0 bar |
| Max flow | - |
| Drawbar type | - |
| Claimed power | - |
| Drawbar horsepower | 129.08 hp or 96.3 kW |
| Fuel consumption | 8.1 gal/hour or 30.7 l/hour |
| Pulling power | 20604 lbs or 9345 kg |
| Claimed power | 140 hp or 104.4 kW |
| Real power | 150.58 hp or 112.3 kW |
| Engine @RPM | 540@1950 (rpm) |
| PTO Clutch | hydraulic wet discs |
| Rear PTO | independent |
| Rear PTO RPM | 540 (rpm) |
| Front PTO | - |
| Front PTO RPM | - |
| Mid PTO | - |
| Mid PTO RPM | - |
| Fuel consumption | 8.3 gal/hour or 31.4 l/hour |
| Hitch system | - |
| Rear hitch | 3/3N |
| Rear hitch lift | 10,050 lbs or 4558 kg |
| Front hitch | - |
| Front hitch lift | - |
Allis Chalmers HD21
General Infos| Make | Allis Chalmers |
| Model | HD21 |
| Country | United states |
| Production | From 1954 Until 1965 |
| Price | - |
| Tractor type | Agricultural Crawler tractor |
| Fuel | diesel |
| Service repair manual | Allis Chalmers HD21 Manual |
Dimensions, sizes and tires
| AG front tires | tracks |
| AG rear tires | tracks |
| Lawn front tires | - |
| Lawn rear tires | - |
| Indus front tires | - |
| Indus rear tires | - |
| Weight | 45500 lbs or 20638 kg |
| Length | 198 inches [502 cm] |
| Width | - |
| Height | 99 inches [251 cm] |
| Wheelbase | - |
| Ground clearance | - |
| Turning radius | - |
| Rear tread size | - |
| Front tread size | - |
| Turning radius | - |
Horsepower and engin specs
| Engine capacity | 844 ci or 13.8 L |
| Cylinders | 6 cylinders |
| Engine power | 225 hp or 167.8 kW |
| Engine RPM | 1800 (rpm) |
| Torque | - | Torque RPM | - |
| Fuel type | diesel |
| Fuel injection | - |
| Fuel tank size | 135 gal or 511.0 L |
| Oil capacity | - |
| Oil change | - |
| Starter motor | - |
| Starter volts | 24 V |
| Parts And Accessories | Allis Chalmers HD21 Parts |
| Batteries number | 2 |
| Batteries voltage | 12 V |
| Battries Amps | - |
| Cold Amps | - |
| Ground force | - |
| Charging system | - |
| Charging Volts | - |
| Charging Amps | - |
| Trans system | - |
| Trans type | torque converter |
| Trans gears | 2 forward and 1 reverse |
| Clutch system | - |
| Wheel drive | crawler |
| Final drive | - |
| Steering | - |
| Braking system | contracting band |
| Cabin type | Open operator station |
| Differentiel lock | - |
| System | - |
| Valves | - |
| Pump flow | - |
| SVC flow | - |
| Steering flow | - |
| Tank capacity | - |
| Hydraulic pressure | - |
| Max flow | - |
| Drawbar type | - |
| Claimed power | - |
| Drawbar horsepower | 135.12 hp or 100.8 kW |
| Fuel consumption | - |
| Pulling power | 40563 lbs or 18399 kg |
| Claimed power | - |
| Real power | - |
| Engine @RPM | - |
| PTO Clutch | - |
| Rear PTO | - |
| Rear PTO RPM | - |
| Front PTO | - |
| Front PTO RPM | - |
| Mid PTO | - |
| Mid PTO RPM | - |
| Fuel consumption | - |
| Hitch system | - |
| Rear hitch | - |
| Rear hitch lift | - |
| Front hitch | - |
| Front hitch lift | - |
Related tractor comparison
Allis Chalmers HD21 Allis Chalmers HD20
John Deere 7720 McCormick-Deering Super AW-6
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John Deere 7720 ATC Terratrac 356
Allis Chalmers HD21 Lanz Bulldog D5006
Allis Chalmers HD21 International Harvester DED
Choose another tractor
Useful links and guides ....
- John Deere provided us with the latest version of its 7720 service repair manual
- Find All mechanical and electrical parts and accessories of John Deere 7720 farm-tractor here
- Get your Allis Chalmers HD21 manual book version
- Cabine, electrical And mechanical parts for Allis Chalmers HD21 farm-tractor here
