Lawn Tractor · 1975Unverified
Allis Chalmers 720
Allis Chalmers 720 — Garden tractor · 20 hp. Reference specifications; pending source verification.
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
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.