Allis Chalmers 7040 row-crop tractor: review and specs

The Allis Chalmers 7040 is a 2WD row-crop tractor manufactured by Allis Chalmers in West Allis, Wisconsin, USA from 1975 to 1977. The Allis Chalmers 7040 is equipped with a 7.0 L (426.0 cu·in) six-cylinder diesel engine and one of two transmissions: a partial power shift transmission with 20 forward and 4 reverse gears or a partial power shift transmission with 12 forward and 2 reverse gears.

The Allis Chalmers 7040 row-crop tractor used the Allis Chalmers 3500 Mark II engine. It is a 7.0 L, 6,980 cm², (426.0 cu·in) six-cylinder turbocharged diesel engine with 108.0 mm (4.25 in) of the cylinder bore and 127.0 mm (5 in) of the piston stroke. The compression ratio rating is 16.0:1. This engine produced 153.1 PS (112.6 kW; 151.0 HP) at 2,300 rpm of output power.

The Allis Chalmers 7040 is equipped with hydrostatic power steering, differential hydraulic wet discs brakes, Acousta-Cab, and 193.0 liters (51 US gal.; 42.5 Imp. gal) fuel tank.

Allis Chalmers 7040 Specifications

General Specifications
Model	Allis Chalmers 7040
Length	4,400 mm (173.2 in)
Width	2,420 mm (95.3 in)
Height (exhaust)	2,940 mm (115.7 in)
Wheel base	2,690 mm (105.9 in)
Weight	5,310 kg (11,707 lbs)
Fuel tank capacity	193.0 liters (51 US gal.; 42.5 Imp. gal)
Battery	12V
Cabin type	Acousta-Cab
Engine
Engine model	Allis Chalmers 3500 Mark II
Engine type	Four-stroke, liquid-cooled, inline
Cylinders	6
Fuel type	Diesel
Displacement	7.0 L, 6,980 cm², (426.0 cu·in)
Bore and stroke	108.0 mm X 127.0 mm (4.25 in X 5 in)
Compression ratio	16.0:1
Horsepower	153.1 PS (112.6 kW; 151.0 HP) at 2,300 rpm
Starter	Electric
Oil capacity:	18.0 L (19 US. qt, 15.8 Imp. qt.)
Coolant capacity:	29.3 L (31 US. qt, 25.8 Imp. qt.)

Transmission and chassis
Chassis	4×2 2WD
Steering type	Hydrostatic power
Brakes	Differential hydraulic wet discs
Differential lock	Power (standard)
Transmission model	Power Director
Transmission type	Partial power shift
Gears	20 forward and 4 reverse
Speed	Forward: 30.2 kmh (18.8 mph) Reverse: 13.5 (8.4 mph)
Transmission model	Power Shift
Transmission type	Partial power shift
Gears	12 forward and 2 reverse
Speed	Forward: 29.6 kmh (18.4 mph) Reverse: 12.9 (8 mph)
Tires
Front tires	Ag: 11.00-16
Rear tires	Ag: 18.4-38

Three-Point Hitch
Caterogy	III/II
Control type	–
Lift capacity (at ends)	–
PTO (Power take-off shaft)
Rear PTO type	Independent
Rear PTO speed	540/1,000 or 1,000 rpm (optional)
Hydraulic system
Hydraulic type	Closed center
Hydraulic capacity	91.2 liters (24.1 US gal, 20.1 Imp. gal)
Valves	2 or 3
Pump flow	22.0 gpm (83.3 lpm)
Total flow	45.0 gpm (170.3 lpm)

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