Allis Chalmers lawn tractors

Allis Chalmers 620

The Allis Chalmers 620 is a garden tractor produced from 1973 to 1975, built by Simplicity and distributed by Allis Chalmers. It features a 19.5 hp Onan 816cc 2-cylinder gasoline engine, hydrostatic transmission by Sundstrand with infinite forward and reverse gears in 3 ranges, and two-wheel drive with manual steering and disc brakes. The tractor has an open operator station and is built in Port Washington, Wisconsin, USA. It has a fuel capacity of 3.8 gallons and a hydraulic system capacity of 1.25 gallons with 500 psi pressure. The tractor supports optional independent rear PTO and independent front PTO, both with electric clutches. Dimensions include a 56-inch wheelbase, 83-inch length, 48-inch width, and 43.25-inch height, weighing 1300 lbs. Tires include lawn/turf and agricultural options. Attachments include a 60-inch mid-mount mower deck, snowblower, blade, and front-end loaders with various specifications. Electrical system is negative ground with 20 amps charging and 12 volts battery.
Power19 hp
Founded60" deck
Model620

Technical Specifications

Detailed specifications and technical data for Allis Chalmers 620

Engine
Coolingair-cooled horizontal-shaft opposed-twin
Cylinders2-cylinder
Fuel typegasoline
Rated RPM3600
Air cleanerpaper element
Bore/Stroke3.25x3.00 inches (83 x 76 mm)
Displacement816 cc (49.8 ci)
Engine modelOnan CCKB
Oil capacity3.5 qts (3.3 L)
Power (gross)19.5 hp (14.5 kW)
Starter volts12
Compression ratio7:1
Capacity
Fuel3.8 gal (14.4 L)
Hydraulic system1.25 gal (4.7 L)
Overview
Built inPort Washington, Wisconsin, USA
CategoryGarden tractor
DistributorAllis Chalmers
ManufacturerSimplicity
Production years1973 - 1975
Variants
4041similar Simplicity model
Electrical
Groundnegative
Battery volts12
Charging amps20
Hydraulics
Capacity1.25 gal (4.7 L)
Pressure500 psi (34.5 bar)
Pump flow2.25 gpm (8.5 lpm)
Mechanical
DriveTwo-wheel drive
BrakesDisc brakes
SteeringManual steering
Operator stationOpen operator station
Attachments
Blade60 inches width (152 cm), front-mount, hydraulic-lift, manual-angle
Cut height1.625 to 3 inch (4 to 7 cm)
Snowblower52 inches width (132 cm), single-stage, front-mount, hydraulic-lift
Cutting width60 inches (152 cm)
Front-end loader[object Object],[object Object]
60" mid-mount mower deck3-blade with hydraulic lift
Transmission
Typehydrostatic
Gearsinfinite forward and reverse (3-range)
ManufacturerSundstrand
Tractor hitch
Rear Type0
Serial Numbers
LocationSerial number decal on the right side of the tractor frame, above the foot rest.
Dimensions & Tires
Width48 inches (121 cm)
Height43.25 inches (109 cm)
Length83 inches (210 cm)
Rear tire29x12.50-15
Wheelbase56 inches (142 cm)
Front tire20x8-10
Ag rear tire8x16
Ag front tire4.00x12
Shipping weight1300 lbs (589 kg)
Ground clearance15 inches (38 cm)
Lawn/turf rear tire29x12.50-15
Lawn/turf front tire20x8-10
Power Take-off (PTO)
Rear PTOindependent Optional
Front PTOindependent
Clutch (rear)electric
Rear PTO Type2000
Clutch (front)electric
Front PTO Type3600