Allis Chalmers 4W-305
Power
305 hp
Production
1982-1985
Engine
Turbocharged diesel, 6-cylinder
Transmission
Power Director
Weight
27100 lbs [12292 kg]
Drive
4WD
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Introduction
Allis Chalmers 4W-305: High-Capacity Four-Wheel Drive Tractor
The Allis Chalmers 4W-305 is a high-horsepower four-wheel drive tractor produced between 1982 and 1985. Designed for large-scale agricultural operations, this machine emphasizes heavy-duty performance and substantial towing capabilities.
Engine and Performance
The tractor is powered by the Allis Chalmers 6120T, a 12.0-liter, 6-cylinder turbocharged diesel engine. This liquid-cooled unit delivers 305 hp at a rated speed of 2300 RPM. The engine configuration, featuring a 16.25:1 compression ratio, is engineered to sustain the high torque requirements of intensive field work.
Transmission and Drivetrain
The 4W-305 utilizes the Power Director transmission, a two-speed power shift system offering 20 forward and 4 reverse gears. This configuration allows for precise speed adjustments under load. Power is delivered to all four wheels through planetary final drives, supported by wet disc brakes for reliable stopping power.
Hydraulics and PTO
Equipped with a closed-center load-sensing hydraulic system, the tractor provides a total flow of 92 gpm (348.2 lpm) across three valves, with 21 gpm (79.5 lpm) dedicated to the selective control valves (SCV). The independent rear PTO operates at 1000 RPM using a 1.75-inch shaft, providing the necessary drive for high-demand implements.
Dimensions and Stability
With a wheelbase of 126 inches and a shipping weight of 27,100 lbs, the 4W-305 is built for maximum soil contact and traction. The tractor features a standard climate-controlled cab to maintain operator efficiency during long hours of operation.
Conclusion
The Allis Chalmers 4W-305 represents a significant period of heavy-duty tractor development. Its combination of high power, load-sensing hydraulics, and robust four-wheel drive architecture positions it as a machine suited for heavy tillage and large-scale cultivation tasks.
Production Information of Allis Chalmers, 4W-305
- Four-wheel Drive (4WD) tractor
| Manufacturer | Allis Chalmers |
|---|---|
| Original price | $93,685 |
Dimension and Tires Information of Allis Chalmers, 4W-305
| Rear axle | 119.5 inch length [3035 mm] |
|---|---|
| Wheelbase | 126 inches [320 cm] |
| Shipping weight | 27100 lbs [12292 kg] |
| Height (cab) | 139 inches [353 cm] |
| Length | 285 inches [723 cm] |
| Front axle | 95.5 inch length [2425 mm] |
| Clearance (front axle) | 25.8 inches [65 cm] |
| Height (hood) | 97 inches [246 cm] |
| Rear axle | 95.5 inch length [2425 mm] |
| Front axle | 119.5 inch length [3035 mm] |
| Clearance (rear axle) | 29.9 inches [75 cm] |
| Ag rear | 23.1x30 |
|---|---|
| Ag front | 18.4x38 |
| Ag front(optional) | 30.5x32 |
| Ag front(optional) | 24.5x32 |
| Ag rear | 18.4x38 |
| Ag rear(optional) | 24.5x32 |
| Ag rear(optional) | 20.8x38 |
| Ag front | 23.1x30 |
| Ag front(optional) | 20.8x38 |
| Ag front(optional) | 30.5x32 |
Engine Specifications of Allis Chalmers, 4W-305
- Allis Chalmers 6120T
- Liquid-cooled inline
- 6-cylinder
- Turbocharged diesel
| Air cleaner | Dry |
|---|---|
| Idle RPM | 950-2580 |
| Displacement | 731 ci [12.0 L] |
| Bore/Stroke | 5.25x5.625 inches [133 x 143 mm] |
| Power | 305 hp [227.4 kW] |
| Rated RPM | 2300 |
| Compression | 16.25:1 |
| Coolant capacity | 72 qts [68.1 L] |
| Oil capacity | 60 qts [56.8 L] |
| Starter volts | 12 |
Transmission Information of Allis Chalmers, 4W-305
Transmission variants 1
| Transmission | Power Director |
|---|---|
| Type | Two-speed power shift |
| Gears | 20 forward and 4 reverse |
Mechanical Specs of Allis Chalmers, 4W-305
- Four-wheel drive
- Cab standard with air-conditioning.
- Wet disc brakes
| Final drives | Planetary |
|---|
Power Information of Allis Chalmers, 4W-305
| Rear PTO | Independent |
|---|---|
| Rear PTO Type | 1000 (1.75) |
Hydraulics Specifications of Allis Chalmers, 4W-305
| Type | Closed center load-sensing |
|---|---|
| Total flow | 92 gpm [348.2 lpm] |
| Valves | 3 |
| SCV flow | 21 gpm [79.5 lpm] |
Three-Point Hitch of Allis Chalmers, 4W-305
| Rear Type(optional) | IV/III |
|---|
Electrical System of Allis Chalmers, 4W-305
| Ground | Negative |
|---|---|
| Charging system | Alternator |
| Battery volts | 12 |
Where it sits
With 305 HP, the Allis Chalmers 4W-305 sits just above 8550 (300 HP) in Allis Chalmers's range. Its power puts it in the 95th percentile of 1980s models in our database (2052 machines).
Frequently asked questions
How much horsepower does the Allis Chalmers 4W-305 have?
The Allis Chalmers 4W-305 delivers 305 HP.
What years was the Allis Chalmers 4W-305 produced?
The Allis Chalmers 4W-305 was produced in 1982-1985.
What engine does the Allis Chalmers 4W-305 have?
The Allis Chalmers 4W-305 is powered by a Turbocharged diesel, 6-cylinder engine.
What transmission does the Allis Chalmers 4W-305 use?
The Allis Chalmers 4W-305 uses a Power Director transmission.
How much does the Allis Chalmers 4W-305 weigh?
The Allis Chalmers 4W-305 weighs 27100 lbs [12292 kg].
Is the Allis Chalmers 4W-305 4WD?
The Allis Chalmers 4W-305 is available in 4WD.