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Lawn Tractor · 1975Unverified

Allis Chalmers 720

Name: Allis Chalmers 720
Brand: Allis Chalmers

Allis Chalmers 720 — Garden tractor · 20 hp. Reference specifications; pending source verification.

The Allis Chalmers 720 is a lawn tractor with a rated power of 20 hp, placing it at the more powerful end of its class. Manufactured from 1975 to 1980, this model features a 2-cylinder petrol air-cooled engine, paired with two-wheel drive and a hydrostatic transmission. The operating weight of the Allis Chalmers 720 ranges from 1235 to 1480 pounds. It is suitable for operations covering up to 200 acres.

Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.

Rated power

20 hp

Weight

1235 to 1480 pounds

Catalogue coverage

Variants represented

Richest spec table

91 rows

Recorded power

20 hp

Recorded weight

419 kg

Transmissions

hydrostatic

Production years

1975-1980

Verified variants

No linked source document is currently displayed; verify critical figures with the manufacturer or dealer.

Hover a source tag to verify

Overview

DistributorAllis ChalmersReference

ManufacturerSimplicityReference

Garden tractorReference

Built in Port Washington, Wisconsin, USAReference

Two-wheel driveReference

Final drivesspur gearReference

Manual steeringReference

Disc brakesReference

Open operator station.Reference

Variants

720 Specialeconomy model with no 3-point or rear PTOReference

9020similar Simplicity modelReference

Engine

19.5HP Onan 816cc 2-cyl gasolineReference

Onan CCKBReference

gasolineReference

2-cylinderReference

air-cooled horizontal-shaft opposed-twinReference

Displacement49.8 ciReference

Bore/Stroke83 x 76 mmReference

Power (gross)14.5 kWReference

Air cleanerpaper elementReference

Compression7:1Reference

Rated RPM3600Reference

Starter volts12Reference

Oil capacity3.3 LReference

Image courtesy of Mike MeyerReference

Transmission

hydrostaticReference

ManufacturerSundstrandReference

TypehydrostaticReference

Gearsinfinite forward and reverse (3-range)Reference

Oil capacity5.7 LReference

Capacities

Fuel14.4 LReference

PTO & Hydraulics

Hydraulic system5.7 LReference

Typeopen centerReference

Capacity5.7 LReference

Pressure34.5 barReference

Pump flow9.5 lpmReference

Rear Type0Reference

Rear PTOindependentReference

ClutchelectricReference

Rear PTO Type2000Reference

Front PTOindependentReference

Front PTO Type3600Reference

Dimensions

Wheelbase142 cmReference

Weight1235 to 1480 poundsReference

Front tire20x8.00-10Reference

Rear tire29x12.00-15Reference

Weight419 kgReference

Ag front4.00x12Reference

Ag rear8.00-16Reference

Lawn/turf front20x8.00-10Reference

Lawn/turf rear29x12.00-15Reference

Lawn/turf front6.90/6.00-9Reference

Lawn/turf rear31x15.50-15Reference

Length210 cmReference

Width121 cmReference

Height109 cmReference

Ground clearance38 cmReference

Flange rear axleReference

Shipping560 kgReference

Shipping589 kgReference

Operating671 kgReference

Allis Chalmers 720 attachments

60" mid-mount mower deckReference

snowblowerReference

bladeReference

front-end loaderReference

backhoeReference

720 Serial Number Location

Right side of tractor frame.Reference

Electrical

GroundnegativeReference

Charging systemflywheel magnetoReference

Charging amps20Reference

Battery volts12Reference

Battery AH53Reference

Attachment overview

60" mid-mount mower deckReference

SnowblowerReference

BladeReference

Front-end loaderReference

BackhoeReference

60" Mower deck

Typemid-mount Allis ChalmersReference

Type3-bladeReference

Cutting width152 cmReference

Brantly LD6 Backhoe

Backhoe typeBrantly LD6 BackhoeReference

Transport height182 cmReference

Bucket width20 cmReference

Bucket width33 cmReference

Bucket width40 cmReference

2-Foot flat digging depth182 cmReference

Reach from pivot274 cmReference

Swing Arc135°Reference

Bucket force1360 kgReference

Dipperstick force707 kgReference

Speeds

With 29x12.00-15 R3 tires.Reference

Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.

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