Allis Chalmers 7580 four-wheel drive: review and specs

The Allis Chalmers 7580 is a 4WD four-wheel drive tractor manufactured by Allis Chalmers in West Allis, Wisconsin, USA from 1977 to 1981. The Allis Chalmers 7580 is equipped with a 7.0 L (426.0 cu·in) six-cylinder diesel engine and a partial power shift transmission with 20 forward and 4 reverse gears.

The Allis Chalmers 7580 four-wheel drive tractor used the Allis Chalmers 3750 Mark II engine. It is a 7.0 L, 6,981 cm², (426.0 cu·in) six-cylinder turbocharged intercooled diesel engine with 108.0 mm (4.25 in) of the cylinder bore and 127.0 mm (5 in) of the piston stroke. The compression ratio rating is 16.0:1. This engine produced 208.9 PS (153.6 kW; 206.0 HP) at 2,550 rpm of output power.
The Allis Chalmers 7580 is equipped with hydrostatic power steering, hydraulic wet discs brakes, the Acousta cab, and 643.5 liters (170 US gal.; 141.6 Imp. gal) fuel tank.

Allis Chalmers 7580 Specifications

General Specifications
Model	Allis Chalmers 7580
Length	5,710 mm (224.8 in)
Width	2,420 mm (95.3 in)
Height	3,810 mm (150 in)
Wheel base	3,200 mm (126 in)
Ground clearance	430 mm (16.9 in)
Weight	10,665 kg (23,512 lbs)
Fuel tank capacity	643.5 liters (170 US gal.; 141.6 Imp. gal)
Battery	Four 12V
Cabin type	Acousta cab
Engine
Engine model	Allis Chalmers 3750 Mark II
Engine type	Four-stroke, liquid-cooled, inline
Cylinders	6
Fuel type	Diesel
Displacement	7.0 L, 6,981 cm², (426.0 cu·in)
Bore and stroke	108.0 mm X 127.0 mm (4.25 in X 5 in)
Compression ratio	16.0:1
Horsepower	208.9 PS (153.6 kW; 206.0 HP) at 2,550 rpm
Starter	Electric
Oil capacity:	23.7 L (25 US. qt, 20.9 Imp. qt.)
Coolant capacity:	36.0 L (38 US. qt, 31.7 Imp. qt.)

Transmission and chassis
Chassis	4×4 articulated 4WD
Steering type	Hydrostatic power
Brakes	Hydraulic wet discs
Transmission model	Power Director
Transmission type	Partial power shift
Gears	20 forward and 4 reverse
Speed	Forward: 30.4 kmh (18.9 mph) Reverse: 13.7 (8.5 mph)
Tires
Front tires	Ag: 20.8-38
Rear tires	Ag: 20.8-38

Three-Point Hitch
Caterogy	III
Control type	–
Lift capacity (at ends)	–
PTO (Power take-off shaft)
Rear PTO type	Independent
Rear PTO speed	540 rpm
Hydraulic system
Hydraulic type	Closed center
Valves	3 to 4
Pump flow	23.0 gpm (87.1 lpm)
Total flow	74.9 gpm (283.5 lpm)

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