Allis Chalmers HD21 VS John Deere 8850 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 8850
General Infos| Make | John Deere |
| Model | 8850 |
| Country | United states |
| Production | From 1982 Until 1988 |
| Price | - |
| Tractor type | Four wheel Drive (4WD) tractor |
| Fuel | diesel |
| Service repair manual | John Deere 8850 Manual |
Dimensions, sizes and tires
| AG front tires | 20.8-42 |
| AG rear tires | 20.8-42 |
| Lawn front tires | - |
| Lawn rear tires | - |
| Indus front tires | - |
| Indus rear tires | - |
| Weight | 37,480 lbs or 17000 kg |
| Length | 257.8 inches [654 cm] |
| Width | - |
| Height | - |
| Wheelbase | 133 inches [337 cm] |
| Ground clearance | - |
| Turning radius | 19 feet [5.8 m] |
| Rear tread size | - |
| Front tread size | - |
| Turning radius | - |
Horsepower and engin specs
| Engine capacity | 955 ci or 15.7 L |
| Cylinders | 8 cylinders |
| Engine power | 370 hp or 275.9 kW |
| Engine RPM | 2100 (rpm) |
| Torque | - | Torque RPM | - |
| Fuel type | diesel |
| Fuel injection | - |
| Fuel tank size | 240 gal or 908.4 L |
| Oil capacity | 51 qts or 48.3 L |
| Oil change | - |
| Starter motor | - |
| Starter volts | 12 V |
| Parts And Accessories | John Deere 8850 Parts |
| Batteries number | 3 |
| Batteries voltage | 12 V |
| Battries Amps | - |
| Cold Amps | 625 |
| Ground force | negative |
| Charging system | alternator |
| Charging Volts | - |
| Charging Amps | 110 amps |
| Trans system | Quad-Range |
| Trans type | partial power shift |
| Trans gears | 16 forward and 6 reverse |
| Clutch system | Perma-Clutch hydraulic wet discs |
| Wheel drive | 4x4 articulated 4WD |
| Final drive | - |
| Steering | hydrostatic power |
| Braking system | power wet disc |
| Cabin type | Sound-Gard cab with air-conditioning |
| Differentiel lock | - |
| System | closed center constant-pressure |
| Valves | 3 to 4 |
| Pump flow | 44 gpm or 166.5 lpm |
| SVC flow | - |
| Steering flow | - |
| Tank capacity | 45.5 gal or 172.2 L |
| Hydraulic pressure | - |
| Max flow | - |
| Drawbar type | - |
| Claimed power | - |
| Drawbar horsepower | 269.77 hp or 201.2 kW |
| Fuel consumption | 19.2 gal/hour or 72.7 l/hour |
| Pulling power | 35,330 lbs or 16025 kg |
| Claimed power | 300 hp or 223.7 kW |
| Real power | 303.99 hp or 226.7 kW |
| Engine @RPM | - |
| PTO Clutch | hydraulic wet disc |
| Rear PTO | independent |
| Rear PTO RPM | 1000 (rpm) |
| Front PTO | - |
| Front PTO RPM | - |
| Mid PTO | - |
| Mid PTO RPM | - |
| Fuel consumption | 19.3 gal/hour or 73.1 l/hour |
| Hitch system | lower-link |
| Rear hitch | 4/4N |
| Rear hitch lift | 10,250 lbs or 4649 kg |
| Front hitch | - |
| Front hitch lift | - |
Related tractor comparison
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John Deere 8850 John Deere 8450
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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 8850 manual book version
- Cabine, electrical And mechanical parts for John Deere 8850 farm-tractor here
