Allis Chalmers 7580

The Allis Chalmers 7580 is a tractor produced by Allis Chalmers. It is equipped with a 426 ci 7.0 L engine. The listed engine power is 186.35 hp 139.0 kW. Transmission: Power Director. Operating weight: 23100 to 23510 pounds.

Engine Power

186.35 hp 139.0 kW

Fuel & Capacities

170 gal 643.5 L

Transmission

Power Director

Operating Weight

23100 to 23510 pounds

Overview

	1976 - 1981 Four-wheel Drive (4WD) tractor

Production
Manufacturer	Allis Chalmers
Four-wheel Drive (4WD) tractor
Built in West Allis, Wisconsin, USA
Total built	1610
Original price	$63,084

Allis Chalmers 7580 Engine
Allis Chalmers 7.0L 6-cyl diesel
Fuel tank	170 gal 643.5 L
Engine details ...

Allis Chalmers 7580 Transmission
20-speed partial power shift
Transmission details ...

Allis Chalmers 7580 Power
Drawbar (claimed)	153 hp 114.1 kW
PTO (claimed)	186 hp 138.7 kW
Drawbar (tested)	153.70 hp 114.6 kW
PTO (tested)	186.35 hp 139.0 kW
Performance test details ...

Mechanical
Four-wheel drive
Steering	hydrostatic power
Hydraulic wet discs brakes
Acousta cab standard with heat and air-conditioning. Optional radio and 8 track tape player.

Hydraulics
Type	closed center
Valves	3 to 4
Pump flow	23 gpm 87.1 lpm
Total flow	74.9 gpm 283.5 lpm

Tractor hitch
Rear Type	III

Power Take-off (PTO)
Rear PTO	independent
Rear PTO Type	1000

Dimensions & Tires
Wheelbase	126 inches 320 cm
Weight	23100 to 23510 pounds
Front tire	20.8x38
Rear tire	20.8x38
Full dimensions and tires ...

Electrical
Charging system	alternator
Batteries	4
Battery volts	12

References

Four-wheel drives - mammoth size... published in 1978, by Allis Chalmers
7580 - The beat built to eat acres, not fuel. published in 1977, by Allis Chalmers

Engine

Engine Detail — 426 ci / 7.0 L Diesel

Configuration	turbocharged intercooled diesel, 6-cylinder, liquid-cooled inline
Allis Chalmers 3750 Mark II
Displacement	426 ci 7.0 L
Bore/Stroke	4.25x5.00 inches 108 x 127 mm
Air cleaner	dry
Compression	16:1
Rated RPM	2550
Idle RPM	775-2750
Firing order	1-5-3-6-2-4
Starter volts	12
Oil capacity	25 qts 23.7 L
Coolant capacity	38 qts 36.0 L

Transmission

Transmission — Power Director

Transmission	Power Director
Type	partial power shift
Gears	20 forward and 4 reverse
With 20.8x38 rear tires.

Dimensions

Allis Chalmers 7580 Tires
Ag front	20.8x38
Ag rear	20.8x38
Ag front	23.1x30
	24.5x32
	30.5x32
	20.8x34
	18.4x38
Ag rear	23.1x30
	24.5x32
	30.5x32
	20.8x34
	18.4x38

Dimensions
Wheelbase	126 inches 320 cm
Length	225 inches 571 cm
Width	95.5 inches 242 cm
	119.5 inches (long axle) 303 cm
Height (hood)	85.3 inches 216 cm
Height (exhaust)	150 inches 381 cm
Ground clearance	17 inches 43 cm
Front tread	62 to 123 inches 157 to 312 cm
Rear tread	62 to 123 inches 157 to 312 cm

Allis Chalmers 7580 Weight
Shipping	23,100 lbs 10478 kg
Operating	23,510 lbs 10664 kg
Ballasted	25,000 lbs 11340 kg

Tests

Nebraska Tractor Test 1229
Diesel 20-speed 4WD October 26 - November 8, 1976 Link: Nebraska Tractor Test 1229 file
PTO performance
Power at rated engine speed	186.35 hp 139.0 kW
Fuel use	12.6 gal/hour 47.7 l/hour
Drawbar performance
Max power	153.70 hp 114.6 kW
Fuel use	12.6 gal/hour 47.7 l/hour
Gear 4SL used for power test.
Max pull	23,310 lbs 10573 kg
Gear 1SH used for pull test.

Photos

Allis-Chalmers 7580 promotional photo.

Allis-Chalmers 7580, left side.

Allis-Chalmers 7580 with singles.

Allis-Chalmers 7580 overhead controls for air-conditioning, electric mirrors, and stadium lights.

Recommended Implements & Sizing Guide

Engineering recommendations for Allis Chalmers 7580 based on its 186.35 HP power envelope and ASAE agricultural standards.

Implement & Operation	Recommended Size	Workload Rating	Engineering Notes
Moldboard PlowPrimary Tillage	5 to 7 Bottom (18")5 - 7 铧 (45 cm)	Commercial / Field Scale	Large acreage tillage; requires front ballast weights.
Rotary Cutter / MowerMowing & Clearing	15 to 20 ft Batwing4.6 - 6.1 m 宽幅折叠翼	Commercial / Field Scale	Large commercial field and roadside mowing operations.
Rotary TillerSeedbed Prep	90 to 120 in Heavy Duty230 - 300 cm 重型旋耕机	Commercial / Field Scale	Deep intensive seedbed preparation for commercial row crops.
Disc HarrowSecondary Tillage	15 to 22 ft Folding Disc4.5 - 6.7 m 折叠式圆盘耙	Commercial / Field Scale	Wide commercial field leveling; requires hydraulic remotes.
Hay BalerHay & Forage	Large Square Baler (3x4 or 4x4)大方捆商用打捆机 (1.2x1.2 m)	Commercial / Field Scale	High-capacity commercial forage harvesting (1000 RPM PTO).

Sizing & Soil Condition NoteActual implement sizing varies depending on local soil conditions (heavy clay vs sandy loam), field slope, and operating speed. Heavy tillage implements may require front ballast weights and wheel weights.

Fluids, Capacities & Working Autonomy

Standard fluid requirements, service intervals, and continuous runtime estimates for Allis Chalmers 7580.

Estimated Continuous Field Runtime: 17.5 hrs

Approximately 17.5 hours of continuous field operation at ~75% rated power on a full tank (170 gal / 643.5 L).

Estimated 75% Load Fuel Burn~9.7 gal/hr (36.7 L/hr)

Engine Crankcase Oil

SAE 15W-40 (Heavy Duty Diesel)

Standard Spec: API CK-4 / CJ-4 Heavy Duty

Service Interval: 150 – 250 Hours

Transmission & Hydraulic System

UTTO (Universal Tractor Transmission Oil)

Standard Spec: ISO VG 46 / 68 (Wet Brake & Trans Compatible)

Service Interval: 600 – 1000 Hours

Engine Cooling System

50/50 Ethylene Glycol Pre-mix

Standard Spec: ASTM D6210 / Heavy-Duty OAT Antifreeze

Service Interval: 2 Years / 1500 Hours