SPECS / COMPARISON

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

Feature	John Deere 7800Tractor	Allis Chalmers HD6Tractor
Tractor Type	Row-Crop Tractor	Agricultural Crawler Tractor
Horsepower	126.8 kW	—
Weight	6309.0 kg	6080.0 kg
Lift Capacity	4560.0 kg	—
Transmission Type	Full power shift with wet disc clutch	Power shift
Length	475.0 cm	322.0 cm
Pump Flow	96.1 LPM	—
Years Made	1992-1996	1955-1974
Engine Model	John Deere	Allis-Chalmers
Engine Type	4-stroke, liquid-cooled, inline	4-stroke, liquid-cooled, inline
Fuel Type	Diesel	Diesel
Cylinders	6	4
Displacement	7636 cc	5637 cc
Bore	11.61 cm	11.30 cm
Stroke	12.09 cm	14.10 cm
Rear PTO Type	Independent	—
Rear PTO Speed	540 /1000 RPM	—
Rated RPM	2100 RPM	—
Compression Ratio	15.5:1	Natural aspirated: 15.0:1Turbocharged: 16.25:1
Battery	12 V	Two 12V
Starter	Electric	Electric
Height	300.0 cm	167.0 cm
Wheelbase	279.0 cm	—
Fuel Tank Capacity	345.0 l	140.0 l
Coolant Capacity	26.0 l	14.2 l
Hydraulic Capacity	86.7 l	—
Transmission Model	John Deere PowerShift	—
Final Drive	Inboard planetary	—
Gears	19 forward and 7 reverse	2 forward and 2 reverse
Chassis	4×2 2WD or 4×4 MFWD 4WD	Crawler
Max. Travel Speed	16.3 km/h	—
Brakes	Differential hydraulic wet disc	—
Differential Lock	Electro-hydraulic rear	—
Drawbar Category	IIIN/II	—
Cabin Type	ComfortGard cab standard with air-conditioning	Open operator station
Hitch Type	Position and draft control	Tracks
Steering Type	Power	—
Hydraulic Type	Closed center	—
Working Pressure	199.9 bar	—
Valves	2 to 3	—
Source	heavyequipments.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