Allis Chalmers 7020

Last Updated: July 2024

Overview

The Allis Chalmers 7020 is a 2WD row-crop tractor that was built from 1977 to 1981 in West Allis, Wisconsin. It is fitted with an Allis Chalmers 649I six-cylinder, 301 cubic inch, liquid-cooled, intercooled turbocharged diesel engine that produces 123.79 horsepower at 2300 RPM. The transmission is a partial power shift with 6 ranges and operator power shift, and 2 reverse gears. The hydraulic system is closed center with a capacity of 28.0 L. This tractor features an Acousta-Cab, boosting operator comfort, and sits on a 106-inch wheelbase. With a 51-gallon fuel tank capacity, this tractor was designed to work long hours in the field with fewer refueling stops. Independent test results show a maximum drawbar power of 101.89 hp, fuel consumption of 7.788 gal/hr at maximum power, and a fuel efficiency of 15.90 hp.hr/gal.
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Key Specifications

Category: Row Crop

Power Output: 123.79

Transmission: Partial power shift

Drive Type: 2WD

Operating Weight: 11,770 (without ballast)

Fuel Type: Diesel

Image Gallery

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Allis Chalmers 7020 vs. Similar Tractors

Power Output
Average
Greater than 51% of similar tractors.
Hitch Capacity
Poor
Greater than 9% of similar tractors.
Operating Weight
Poor
Greater than 5% of similar tractors.

Technical Specifications

Engine

Manufacturer
Allis Chalmers
Model
649I
Cooling Type
Liquid-cooled
Cylinder Orientation
Inline
Valve Configuration
-
Fuel Type
Diesel
Induction Type
Intercooled turbocharged
Cylinders
6
Displacement (ci)
301
Bore (in)
3.875
Stroke (in)
4.25
Rated RPM
2300
Power Output (hp)
123.79

Transmission

Type
Partial power shift
Forward Gears
6 ranges with operator power shift
Reverse Gears
2
Total Gears
-

Dimensions

Length (in)
163
Width (in)
92.6
Height (in)
116 (to exhaust)
Operating Weight (lb)
11,770 (without ballast)

Power Take-Off (PTO)

PTO Type
Independent
PTO Speed 1 (rpm)
540/1,000
PTO Speed 2 (rpm)
-
PTO Speed 3 (rpm)
-

Miscellaneous

Chassis
4x2 2WD
Drive Type
2WD
Steering Type
Hydrostatic power
Coolant Capacity (qts)
26
Front Tire Diameter (in)
16
Front Tire Width (in)
11
Rear Tire Diameter (in)
-
Rear Tire Width (in)
-
Front/Rear Rim Diameter (in)
-
Tire Type
Ag
Manufacture - End Year
1981
Hitch Type
Three-Point Hitch
Hitch Category
III/II
Hitch Position
Rear
Hitch Capacity (lb)
6,680 (at 610 mm/24 in)
Operator Station Type
Acousta-Cab
Starter Type
Electric
Brake Type
Differential hydraulic wet disc
Hydraulic System Type
Closed center

Test Results

Nebraska Tractor Test Laboratory - Test Date: October 10 to 21, 1977

Maximum Power and Fuel Consumption

  • Maximum Power (Rated Engine Speed - Two Hours): 123.79 HP (92.31 kW) at 2300 rpm
  • Fuel Consumption at Maximum Power: 7.788 Gal/hr (29.481 l/h) with a fuel efficiency of 0.436 lb/hp.hr (0.265 kg/kW.h) and 15.90 Hp.hr/gal (3.181 kW.h/l)
  • Standard PTO Speed (1000 rpm - One Hour): 123.50 HP (92.10 kW) at 2253 rpm with a fuel efficiency of 16.01 Hp.hr/gal (3.154 kW.h/l)

Drawbar Performance

  • Maximum Available Power (5th Gear - Two Hours): 101.89 HP (75.98 kW) with a drawbar pull of 8199 lbs (36.47 kN) and a speed of 4.66 mph (7.50 km/h), slip 7.61%
  • 75% of Pull at Maximum Power (5th Gear - Ten Hours): 85.93 HP (64.08 kW) with a drawbar pull of 6323 lbs (28.12 kN) and a speed of 5.10 mph (8.20 km/h)
  • 50% of Pull at Maximum Power (5th Gear - Two Hours): 59.53 HP (44.39 kW) with a drawbar pull of 4218 lbs (18.76 kN) and a speed of 5.29 mph (8.52 km/h)

Torque and Engine Performance

  • Lugging Ability in Rated Gear (5th Gear):
  • Crankshaft speed: 2299 rpm, Pull: 8433 lbs (37.51 kN), Power: 104.52 HP (77.94 kW), Speed: 4.65 mph (7.48 km/h), Slip: 7.87%
  • Crankshaft speed: 1148 rpm, Pull: 6826 lbs (30.37 kN), Power: 42.94 HP (32.02 kW), Speed: 2.36 mph (3.80 km/h), Slip: 6.34%

Tractor Sound Level with Cab

  • Maximum Available Power (Two Hours): 78.0 dB(A)
  • 75% of Pull at Maximum Power (Ten Hours): 78.5 dB(A)
  • 50% of Pull at Maximum Power (Two Hours): 77.0 dB(A)



Nebraska Tractor Test Laboratory.(1977).Test 1259: Allis-Chalmers 7020 Power Shift Diesel. Lincoln, NE:Nebraska Tractor Test Laboratory. Retrieved from https://digitalcommons.unl.edu/tractormuseumlit/1578

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