Allis Chalmers 7040

Allis Chalmers 7040 Technical Specifications

Allis Chalmers 7040 is a Row-Crop tractor that was produced by the John Deere between 1975 – 1977.

Below you will find detailed technical specifications for Allis Chalmers 7040 covering engine types, horsepower ratings, weight, height, fuel type and tank volume, oil capacity and type, hydraulic system diagram, wiring diagram, battery specs, etc.

Allis Chalmers 7040 Production

Manufacturer: Allis Chalmers
Factory: West Allis, Wisconsin, USA
Original price: $24,550

Allis Chalmers 7040 Power

Drawbar (claimed): 117 hp
87.2 kW
PTO (claimed): 136 hp
101.4 kW
Drawbar (tested): 114.34 hp
85.3 kW
PTO (tested): 136.49 hp
101.8 kW

Allis Chalmers 7040 Electrical

Charging system: alternator
Battery volts: 12

Allis Chalmers 7040 Mechanical

Chassis: 4×2 2WD
Differential lock: power standard
Steering: hydrostatic power
Brakes: differential hydraulic wet disc
Cab: Acousta cab standard with heater, air-conditioning optional. Optional radio and 8-track tape player. Four-post ROPS canopy optional.
Transmissions: 20-speed partial power shift
  12-speed partial power shift


Fuel: 51 gal
193.0 L
  13 gal
49.2 L (optional tank)
Hydraulic system: 24.1 gal
91.2 L


Type: closed center
Capacity: 24.1 gal
91.2 L
Valves: 2 or 3
Pump flow: 22 gpm
83.3 lpm
Total flow: 45 gpm
170.3 lpm

Tracktor Hitch

Rear Type: III/II

Power Take-off (PTO)

Rear PTO: independent
Rear RPM: 540/1000
  1000 (optional)

Title serial numbers

Location: Above PTO shield
1975: 1303
1976: 4089
1977: 6839

how to read serial numbers…

What year is my Allis Chalmers 7040? Serial Number Decoder

The serial number list shows the first tractor built in each year. The other tractors for that year will have successively higher numbers. Your serial number should be between two of the stated numbers.

The list only includes the numbers of the first tractors produced in each year. Your serial should be somewhere between two numbers.Unless you happen to be the first person to own a tractor, your number will not appear on the list.

Allis Chalmers 7040 Engine detail

Engine Detail
Allis Chalmers 3500 Mark II
turbocharged diesel
Displacement: 426 ci
7.0 L
Bore/Stroke: 4.25×5.00 inches
108 x 127 mm
Pre-heating: ether
  coolant heater (optional)
Compression: 16:1
Rated RPM: 2300
Starter volts: 12
Oil capacity: 19 qts
18.0 L
Coolant capacity: 31 qts
29.3 L

Allis Chalmers 7040 Transmission overview

Engine Oil

Transmission: Power Director
Type: partial power shift
Gears: 20 forward and 4 reverse
Five gears, plus reverse, with two ranges (fast/slow) and high-low power shift. Floor-mounted shifter selects gear, side-console lever selects range. Foot-operated buttons control the Power Director power shift.

Allis Chalmers 7040 Dimensions

Wheelbase: 106 inches
269 cm
Length: 173.6 inches
440 cm
Width: 95.5 inches
242 cm
  119.5 inches
303 cm (long axle)
Operating weight: 11,700 lbs
5307 kg
Ballasted weight: 17,380 lbs
7883 kg
Clearance (front axle): 22.4 inches
56 cm
Clearance (rear axle): 28 inches
71 cm
Front tread: 62 to 88 inches
157 to 223 cm
Rear tread: 64 to 91 inches
162 to 231 cm

Allis Chalmers 7040 Height
Steering wheel: 87 inches
220 cm
Hood: 68 inches
172 cm
Exhaust: 116 inches
294 cm

Allis Chalmers 7040 Tests

Nebraska Tractor Test 1166

Nebraska Tractor Test 1166
Diesel Power Director 2WD
October 29 – November 7, 1974
Link: Nebraska Tractor Test 1166 file
PTO performance
Power at rated engine speed: 136.49 hp
101.8 kW
Fuel use: 9.0 gal/hour
34.1 l/hour
Power at rated PTO speed: 136.26 hp
101.6 kW
Fuel use: 9.0 gal/hour
34.1 l/hour
Drawbar performance
Max power: 114.23 hp
85.2 kW
Fuel use: 8.8 gal/hour
33.3 l/hour
Gear 4SL used for power test.
Max pull: 13,619 lbs
6177 kg
Gear 2SL used for pull test.

Nebraska Tractor Test 1196
Diesel power shift 2WD
November 3 – 20, 1975
Link: Nebraska Tractor Test 1196 file
PTO performance
Power at rated engine speed: 136.30 hp
101.6 kW
Fuel use: 8.9 gal/hour
33.7 l/hour
Power at rated PTO speed: 136.15 hp
101.5 kW
Fuel use: 8.8 gal/hour
33.3 l/hour
Drawbar performance
Max power: 114.34 hp
85.3 kW
Fuel use: 8.8 gal/hour
33.3 l/hour
Gear 1H used for power test.
Max pull: 13,547 lbs
6144 kg
Gear 2L used for pull test.


Is Allis Chalmers 7040 a good tractor?

The Allis Chalmers 7040 is one of the great tractors in the Allis Chalmers stable, and it has earned Allis Chalmers a fantastic reputation.

How much oil does a Allis Chalmers 7040 take?

Check out the Allis Chalmers 7040 oil capacity and oil type in the engine specs section as it may vary across the engines. Keep in mind, that older models might have their oil capacity increased over time. You may compare between the early and late oil capacity.

Do tractors have VIN numbers?

Every tractor has a VIN number. The number is usually engraved below the driver’s seat. Tractor manufacturers put the number in different places on the tractor body.

What was the last year Allis Chalmers made the 7040?

The Allis Chalmers 7040 was an agricultural tractor model made from 1975 – 1977

Where is the serial number on a Allis Chalmers 7040?

Lookup above pto shield

Leave a Comment