Allis Chalmers HD21 VS John Deere 7520 specs comparison
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 | - |
John Deere 7520
General Infos| Make | John Deere |
| Model | 7520 |
| Country | United states |
| Production | From 2003 Until 2007 |
| Price | - |
| Tractor type | Row Crop tractor |
| Fuel | diesel |
| Service repair manual | John Deere 7520 Manual |
Dimensions, sizes and tires
| AG front tires | 14.9R28 |
| AG rear tires | 18.4R38 |
| Lawn front tires | - |
| Lawn rear tires | - |
| Indus front tires | - |
| Indus rear tires | - |
| Weight | 13280 lbs or 6023 kg |
| Length | 203.3 inches [516 cm] |
| Width | 96 inches [243 cm] |
| Height | 114.1 inches [289 cm] |
| Wheelbase | 104.3 inches [264 cm] |
| Ground clearance | - |
| Turning radius | - |
| Rear tread size | 60 to 88 inches |
| Front tread size | 59.5 to 87.5 inches |
| Turning radius | - |
Horsepower and engin specs
| Engine capacity | 414 ci or 6.8 L |
| Cylinders | 6 cylinders |
| Engine power | 150 hp or 111.9 kW |
| Engine RPM | 2100 (rpm) |
| Torque | 454 lb-ft or 615.6 Nm | Torque RPM | 1503 (rpm) |
| Fuel type | diesel |
| Fuel injection | - |
| Fuel tank size | 66 gal or 249.8 L |
| Oil capacity | 22.2 qts or 21.0 L |
| Oil change | - |
| Starter motor | - |
| Starter volts | 12 V |
| Parts And Accessories | John Deere 7520 Parts |
| Batteries number | - |
| Batteries voltage | 12 V |
| Battries Amps | - |
| Cold Amps | 850 |
| Ground force | negative |
| Charging system | alternator |
| Charging Volts | - |
| Charging Amps | 115 amps |
| Trans system | John Deere Infinitely Variable Transmission (IVT) |
| Trans type | partial power shift |
| Trans gears | infinite forward and reverse |
| Clutch system | - |
| Wheel drive | 4x4 MFWD 4WD |
| Final drive | - |
| Steering | power |
| Braking system | hydraulic wet disc |
| Cabin type | ComfortGard Cab standard with air-conditioning |
| Differentiel lock | - |
| System | closed-center PFC |
| Valves | 4 |
| Pump flow | 26.7 gpm or 101.1 lpm |
| SVC flow | - |
| Steering flow | - |
| Tank capacity | - |
| Hydraulic pressure | - |
| Max flow | - |
| Drawbar type | - |
| Claimed power | - |
| Drawbar horsepower | 110.88 hp or 82.7 kW |
| Fuel consumption | 7.4 gal/hour or 28.0 l/hour |
| Pulling power | 13,634 lbs or 6184 kg |
| Claimed power | 125 hp or 93.2 kW |
| Real power | 125.75 hp or 93.8 kW |
| Engine @RPM | - |
| PTO Clutch | electro-hydraulic |
| Rear PTO | independent |
| Rear PTO RPM | 540 (rpm) |
| Front PTO | independent |
| Front PTO RPM | 1000 (rpm) |
| Mid PTO | - |
| Mid PTO RPM | - |
| Fuel consumption | 6.7 gal/hour or 25.4 l/hour |
| Hitch system | - |
| Rear hitch | II/IIIN |
| Rear hitch lift | 7450 lbs or 3379 kg |
| Front hitch | - |
| Front hitch lift | - |
Related tractor comparison
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John Deere 7520 John Deere 8420
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Allis Chalmers HD21 John Deere 6615
Choose another tractor
Useful links and guides ....
- Allis Chalmers provided us with the latest version of its HD21 service repair manual
- Find All mechanical and electrical parts and accessories of Allis Chalmers HD21 farm-tractor here
- Get your John Deere 7520 manual book version
- Cabine, electrical And mechanical parts for John Deere 7520 farm-tractor here
