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Manufacturer-sourced values side by side. No performance equivalence or ranking is applied across different machine classes.

FeatureJohn Deere 7400TractorAllis Chalmers HD6Tractor
Tractor TypeRow-Crop TractorAgricultural Crawler Tractor
Horsepower74.7 kW—
Weight5775.0 kg6080.0 kg
Lift Capacity3110.0 kg—
Transmission TypeFour-speed power shift with hydraulic wet disc clutchPower shift
Years Made1993-19961955-1974
Engine ModelJohn Deere 6068Allis-Chalmers
Engine Type4-stroke, liquid-cooled, inline4-stroke, liquid-cooled, inline
Fuel TypeDieselDiesel
Cylinders64
Displacement6784 cc5637 cc
Bore10.59 cm11.30 cm
Stroke12.70 cm14.10 cm
Rear PTO TypeIndependent—
Rear PTO Speed540 /1000 RPM—
Rated RPM2100 RPM—
Compression Ratio17.8:1Natural aspirated: 15.0:1Turbocharged: 16.25:1
Battery12 VTwo 12V
StarterElectricElectric
Wheelbase284.0 cm—
Fuel Tank Capacity204.4 l140.0 l
Hydraulic Capacity3.0 l—
Transmission ModelPowrQuad—
Gears16 forward and 12 reverse2 forward and 2 reverse
Chassis4×2 2WD or 4×4 MFWD 4WDCrawler
Max. Travel Speed16.9 km/h—
BrakesIndependent hydraulic wet disc—
Drawbar CategoryII/IIIN—
Cabin TypeCab with air-conditioningOpen operator station
Steering TypePower—
Front TiresAg: 10.00-16—
Rear TiresAg: 18.4-38—
Hydraulic TypeClosed center—
Length—322.0 cm
Height—167.0 cm
Coolant Capacity—14.2 l
Hitch Type—Tracks
Sourceheavyequipments.net archive (imported 2026-10)heavyequipments.net archive (imported 2026-10)
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Side-by-side specification comparisons generated from the manufacturer-sourced model files. · 7,051