Allis Chalmers HD21 VS International Harvester 684 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 | - |
International Harvester 684
General Infos| Make | International Harvester |
| Model | 684 |
| Country | United states |
| Production | From 1977 Until 1984 |
| Price | - |
| Tractor type | Utility tractor |
| Fuel | diesel |
| Service repair manual | International Harvester 684 Manual |
Dimensions, sizes and tires
| AG front tires | 7.50-16 |
| AG rear tires | 16.9-30 |
| Lawn front tires | - |
| Lawn rear tires | - |
| Indus front tires | - |
| Indus rear tires | - |
| Weight | 5720 lbs or 2594 kg |
| Length | 142 inches [360 cm] |
| Width | 78.5 inches [199 cm] |
| Height | 100 inches [254 cm] |
| Wheelbase | 83.75 inches [212 cm] |
| Ground clearance | 10.7 inches [27 cm] |
| Turning radius | 12.75 feet [3.9 m] |
| Rear tread size | - |
| Front tread size | - |
| Turning radius | - |
Horsepower and engin specs
| Engine capacity | 239 ci or 3.9 L |
| Cylinders | 4 cylinders |
| Engine power | 69 hp or 51.5 kW |
| Engine RPM | 2400 (rpm) |
| Torque | - | Torque RPM | - |
| Fuel type | diesel |
| Fuel injection | - |
| Fuel tank size | 20 gal or 75.7 L |
| Oil capacity | 8.8 qts or 8.3 L |
| Oil change | - |
| Starter motor | - |
| Starter volts | 12 V |
| Parts And Accessories | International Harvester 684 Parts |
| Batteries number | 1 |
| Batteries voltage | 12 V |
| Battries Amps | - |
| Cold Amps | - |
| Ground force | negative |
| Charging system | - |
| Charging Volts | - |
| Charging Amps | 45 amps |
| Trans system | Torque Amplifier |
| Trans type | two-speed power shift |
| Trans gears | 16 forward and 8 reverse |
| Clutch system | dry disc |
| Wheel drive | 4x2 2WD |
| Final drive | - |
| Steering | power |
| Braking system | independent hydraulic wet disc |
| Cabin type | ROPS canopy or cab optional |
| Differentiel lock | - |
| System | open center |
| Valves | 1 or 2 |
| Pump flow | 13 gpm or 49.2 lpm |
| SVC flow | - |
| Steering flow | - |
| Tank capacity | 9 gal or 34.1 L |
| Hydraulic pressure | - |
| Max flow | - |
| Drawbar type | - |
| Claimed power | 55.9 hp or 41.7 kW |
| Drawbar horsepower | 54.56 hp or 40.7 kW |
| Fuel consumption | 4.1 gal/hour or 15.5 l/hour |
| Pulling power | 6858 lbs or 3110 kg |
| Claimed power | 62.5 hp or 46.6 kW |
| Real power | 58.75 hp or 43.8 kW |
| Engine @RPM | - |
| PTO Clutch | hydraulic wet disc |
| Rear PTO | independent |
| Rear PTO RPM | 540 (rpm) |
| Front PTO | - |
| Front PTO RPM | - |
| Mid PTO | - |
| Mid PTO RPM | - |
| Fuel consumption | 3.8 gal/hour or 14.4 l/hour |
| Hitch system | position and draft control |
| Rear hitch | II |
| Rear hitch lift | 3600 lbs or 1632 kg |
| Front hitch | - |
| Front hitch lift | - |
Related tractor comparison
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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 International Harvester 684 manual book version
- Cabine, electrical And mechanical parts for International Harvester 684 farm-tractor here
