Allis Chalmers 7050

Last Updated: July 2024

Overview

The Allis Chalmers 7050 is an American-made row-crop tractor produced in West Allis, Wisconsin from 1973 to 1974. It features a liquid-cooled, six-cylinder Allis Chalmers diesel engine with a turbocharged intercooled system, yielding 156.49 horsepower at 2300 RPM according to Nebraska Tractor Test results. The tractor implements a selective gear fixed ratio transmission with partial range operator-controlled power shifting, offering 20 forward and 4 reverse gears. Operating with 4x2 2WD, it's equipped with an independent rear power take-off yielding speeds of 540 or 1000 RPM. The hydraulic system uses a direct engine drive control system. For operator comfort, it provides an open station or an optional cab. The three-point hitch system is rated for categories II and III. The tractor's operating weight with ballast is 19,530 lbs, demonstrating its robust build for various agricultural applications.
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Key Specifications

Category: Row Crop

Power Output: 156.49

Transmission: Selective gear fixed ratio with partial range operator-controlled power shifting

Drive Type: 2WD

Operating Weight: 19530

Fuel Type: Diesel

Image Gallery

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Allis Chalmers 7050 vs. Similar Tractors

Power Output
Average
Greater than 64% of similar tractors.
Operating Weight
Poor
Greater than 8% of similar tractors.

Technical Specifications

Engine

Manufacturer
Allis Chalmers
Model
Allis Chalmers
Cooling Type
Liquid-Cooled
Cylinder Orientation
Inline
Valve Configuration
-
Fuel Type
Diesel
Induction Type
Turbocharged Intercooled
Cylinders
6
Displacement (ci)
426
Bore (in)
4.25
Stroke (in)
5
Rated RPM
2300
Power Output (hp)
156.49

Transmission

Type
Selective gear fixed ratio with partial range operator-controlled power shifting
Forward Gears
20
Reverse Gears
4
Total Gears
-

Dimensions

Length (in)
163
Width (in)
95.5
Height (in)
116
Operating Weight (lb)
19530

Power Take-Off (PTO)

PTO Type
Independent Rear PTO
PTO Speed 1 (rpm)
1000
PTO Speed 2 (rpm)
1000
PTO Speed 3 (rpm)
-

Miscellaneous

Chassis
4x2 2WD
Drive Type
2WD
Steering Type
Hydrostatic Power
Coolant Capacity (qts)
-
Front Tire Diameter (in)
-
Front Tire Width (in)
-
Rear Tire Diameter (in)
-
Rear Tire Width (in)
-
Front/Rear Rim Diameter (in)
-
Tire Type
Ag
Manufacture - End Year
1974
Hitch Type
Three-Point Hitch
Hitch Category
III/II
Hitch Position
Rear
Hitch Capacity (lb)
-
Operator Station Type
Open operator station or Cab (optional)
Starter Type
Electric
Brake Type
Differential Hydraulic Wet Discs
Hydraulic System Type
Direct engine drive

Test Results

Nebraska Tractor Test Laboratory - Test Date: March 14 to March 30, 1973

Maximum Power and Fuel Consumption

  • Maximum Power: 157.14 HP at 2301 rpm
  • Fuel Consumption at Maximum Power: 9.827 Gal/hr with a fuel efficiency of 0.434 lb/hp.hr
  • Fuel Type: No. 2 Diesel with Cetane No. 50.1

Drawbar Performance

  • Power at Rated Engine Speed (9th Gear): 135.11 HP with a drawbar pull of 9265 lbs and a speed of 5.47 mph
  • Fuel Consumption at Rated Speed: 0.432 lb/hp.hr with a fuel efficiency of 16.04 Hp.hr/gal

Torque and Engine Performance

  • Maximum Torque: Not explicitly mentioned, but the engine's power characteristics indicate efficient performance under load.
  • Engine: 6-cylinder vertical diesel with turbocharger and inter-cooler.

Hydraulic Performance

  • Hydraulic Control System: Direct engine drive
  • Transmission: Selective gear fixed ratio with partial range operator-controlled power shifting.

Overall Efficiency

  • Fuel Efficiency at Standard PTO Speed (1000 rpm): 16.04 Hp.hr/gal
  • Fuel Consumption: 9.762 Gal/hr at 2253 rpm



Nebraska Tractor Test Lab. (1973). Test 1120: Allis-Chalmers 7050 Diesel. Lincoln, NE: Nebraska Tractor Test Laboratory. Retrieved from https://digitalcommons.unl.edu/tractormuseumlit/1443

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