Allis Chalmers 7040
Power
151 hp[P] hp
Production
1975-1977
Engine
Turbocharged diesel, 6-cylinder
Transmission
Power Director
Weight
11,700 lbs [5307 kg]
Drive
2WD
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Introduction
Allis Chalmers 7040 Row-Crop Tractor
The Allis Chalmers 7040 is a row-crop tractor produced between 1975 and 1977 at the manufacturer's facility in West Allis, Wisconsin. Designed for large-scale agricultural operations, this model occupies the 151 horsepower category within the Allis Chalmers lineup.
Engine and Performance
The tractor is powered by the Allis Chalmers 3500 Mark II, a 7.0-liter, 6-cylinder turbocharged diesel engine. It operates at a rated speed of 2300 RPM with a compression ratio of 16:1. The engine cooling system features a 29.3-liter capacity, with an optional coolant heater available for cold-weather operations.
Transmission and Drivetrain
The 7040 offers two partial power shift transmission configurations: a 20-speed forward and 4-reverse option, or a 12-speed forward and 2-reverse setup. Both systems utilize a combination of floor-mounted gear selectors and side-console range levers, with foot-operated controls for power shifting. Steering is managed via a hydrostatic power system, paired with differential hydraulic wet disc brakes.
Hydraulics and PTO
The hydraulic system is a closed-center design providing a total flow of 170.3 liters per minute, with a dedicated pump flow of 83.3 liters per minute. It includes two or three valve outlets for implement control. The rear independent power take-off (PTO) offers standard 540 and 1000 RPM speeds, with an optional 1000 RPM configuration available.
Operator Environment and Dimensions
The unit features the Acousta cab as standard, which includes heating, with air-conditioning and audio equipment offered as options. With an operating weight of 5,307 kg and a wheelbase of 269 cm, the machine provides stability for field work. Various rear tread widths ranging from 162 to 231 cm allow for adaptation to different row-crop configurations.
Conclusion
The Allis Chalmers 7040 is a heavy-duty row-crop tractor intended for primary tillage and large-scale field applications. Its combination of high-capacity hydraulics, partial power shift transmissions, and robust 6-cylinder power makes it suitable for demanding agricultural environments requiring sustained performance.
Production Information of Allis Chalmers, 7040
- Row-Crop tractor
- Built in West Allis, Wisconsin, USA
| Manufacturer | Allis Chalmers |
|---|---|
| Original price | $24,550 |
Dimension and Tires Information of Allis Chalmers, 7040
| Clearance (front axle) | 22.4 inches [56 cm] |
|---|---|
| Wheelbase | 106 inches [269 cm] |
| Operating weight | 11,700 lbs [5307 kg] |
| Operating weight(optional) | 119.5 inches (long axle) [303 cm] |
| Length | 173.6 inches [440 cm] |
| Clearance (rear axle) | 28 inches [71 cm] |
| Ballasted weight | 17,380 lbs [7883 kg] |
| Width | 95.5 inches [242 cm] |
| Rear tread | 64 to 91 inches [162 to 231 cm] |
| Front tread | 62 to 88 inches [157 to 223 cm] |
| Ag front | 11.00-16 |
|---|---|
| Ag rear | 20.8-38 |
| Ag rear(optional) | 14L-16.1 |
| Ag rear | 18.4-38 |
| Ag rear(optional) | 30.5-32 |
| Ag rear(optional) | 23.1-34 |
| Ag front | 10.00-16 |
| Ag front(optional) | 16.9-38 |
| Ag front(optional) | 15.5-38 |
Engine Specifications of Allis Chalmers, 7040
- Allis Chalmers 3500 Mark II
- Liquid-cooled
- Turbocharged diesel
- 6-cylinder
| Starter volts | 12 |
|---|---|
| Displacement | 426 ci [7.0 L] |
| Displacement(optional) | Coolant heater (optional) |
| Bore/Stroke | 4.25x5.00 inches [108 x 127 mm] |
| Coolant capacity | 31 qts [29.3 L] |
| Oil capacity | 19 qts [18.0 L] |
| Rated RPM | 2300 |
| Compression | 16:1 |
| Pre-heating | Ether |
Transmission Information of Allis Chalmers, 7040
Transmission variants 1
- Five gears, plus reverse, with two ranges (fast/slow) and high-low power shift. Floor-mounted shifter selects gear, side-console lever selects range. Foot-operated buttons control the Power Director power shift.
| Transmission | Power Director |
|---|---|
| Type | Partial power shift |
| Gears | 20 forward and 4 reverse |
Transmission variants 2
- Six gears in two ranges (slow/fast). Clutchless power shift between gears.
| Transmission | Power Shift |
|---|---|
| Type | Partial power shift |
| Gears | 12 forward and 2 reverse |
- 20-speed partial power shift
- 12-speed partial power shift
Mechanical Specs of Allis Chalmers, 7040
- Two-wheel drive
- Acousta cab standard with heater, air-conditioning optional. Optional radio and 8-track tape player. Four-post ROPS canopy optional.
- Differential hydraulic wet disc brakes
| Differential lock | Power standard |
|---|---|
| Steering | Hydrostatic power |
Power Information of Allis Chalmers, 7040
| Rear PTO | Independent |
|---|---|
| Rear PTO Type | 540/1000 |
| Rear PTO Type(optional) | 1000 (optional) |
Hydraulics Specifications of Allis Chalmers, 7040
| Type | Closed center |
|---|---|
| Total flow | 45 gpm [170.3 lpm] |
| Pump flow | 22 gpm [83.3 lpm] |
| Capacity | 24.1 gal [91.2 L] |
| Valves | 2 or 3 |
Three-Point Hitch of Allis Chalmers, 7040
| Rear Type | III/II |
|---|
Electrical System of Allis Chalmers, 7040
| Charging system | Alternator |
|---|---|
| Battery volts | 12 |
Where it sits
With 151 hp[P] HP, the Allis Chalmers 7040 sits between 7030 (145 HP) and 7045 (173 HP) in Allis Chalmers's range. Its power puts it in the 83th percentile of 1970s models in our database (1259 machines).
Frequently asked questions
How much horsepower does the Allis Chalmers 7040 have?
The Allis Chalmers 7040 delivers 151 hp[P] HP.
What years was the Allis Chalmers 7040 produced?
The Allis Chalmers 7040 was produced in 1975-1977.
What engine does the Allis Chalmers 7040 have?
The Allis Chalmers 7040 is powered by a Turbocharged diesel, 6-cylinder engine.
What transmission does the Allis Chalmers 7040 use?
The Allis Chalmers 7040 uses a Power Director transmission.
How much does the Allis Chalmers 7040 weigh?
The Allis Chalmers 7040 weighs 11,700 lbs [5307 kg].
Is the Allis Chalmers 7040 4WD?
The Allis Chalmers 7040 is available in 2WD.