Allis Chalmers 620

Allis Chalmers 620The Allis Chalmers 620 is a 2WD sub-compact utility tractor manufactured by Simplicity for distributor Allis Chalmers from 1973 to 1975. The Allis Chalmers 620 is equipped with a 0.8 L (49.8 cu·in) two-cylinder gasoline engine and a hydrostatic transmission with infinite (3-range) forward and reverse gears.

The Allis Chalmers 620 sub-compact utility tractor used the Onan CCKB engine. It is a 0.8 L, 816 cm2, (49.8 cu·in) two-cylinder natural aspirated gasoline engine with 83.0 mm (3.27 in) of the cylinder bore and 76.0 mm (2.99 in) of the piston stroke. The compression ratio rating is 7.0:1. This engine produced 19.7 PS (14.5 kW; 19.5 HP) at 3,600 rpm of output power.

Allis Chalmers 620 Specifications

General Specifications
ModelAllis Chalmers 620
Length2,100 mm (82.7 in)
Width1,210 mm (47.6 in)
Height1,090 mm (42.9 in)
Wheel base
Ground clearance380 mm (15 in)
Weight680 kg (1,499 lbs)
Fuel tank capacity14.5 liters (3.8 US gal.; 3.2 Imp. gal)
Cabin typeOpen operator station
Engine modelOnan CCKB
Engine typeFour-stroke, air-cooled, inline
Fuel typeGasoline
Displacement0.8 L, 816 cm2, (49.8 cu·in)
Bore and stroke83.0 mm X 76.0 mm (3.27 in X 2.99 in)
Compression ratio7.0:1
Horsepower19.7 PS (14.5 kW; 19.5 HP) at 3,600 rpm
Oil capacity:3.3 L (3.5 US. qt, 2.9 Imp. qt.)
Transmission and chassis
Chassis4×2 2WD
Steering type
Transmission model
Transmission typeHydrostatic
GearsInfinite (3-range) forward and reverse
Front tires Ag: 4.00×12
Lawn/turf: 20-8×10
Rear tires Ag: 8×16
Lawn/turf: 29-12.5×15
Three-Point Hitch
Control type
Lift capacity (at ends)
PTO (Power take-off shaft)
Front PTO type
Front PTO speed2,000 rpm
Rear PTO type
Rear PTO speed2,000 rpm
Hydraulic system
Hydraulic type
Hydraulic capacity4.7 L (4.97 US. qt, 4.14 Imp. qt.)
Pressure500 psi (34.5 bar)
Pump flow2.25 gpm (8.5 lpm)
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