Skip to contentL4420 - Tracteurs — Lomita, CC BY-SA 4.0. Resized; converted to WebP. · Lomita · CC BY-SA 4.0 commons.wikimedia.org source ↗ L4420 - Tracteurs — Lomita, CC BY-SA 4.0. Resized; converted to WebP. · Lomita · CC BY-SA 4.0 commons.wikimedia.org source ↗
An independent tractor referenceSpecifications. Sources. Side by side.
TractorStack.
Search
Find your tractor.
Menu ☰
Years in Production / 1940–1950
Allis-Chalmers
HD7
Explore the specifications, hardware, and original references for the Allis-Chalmers HD7.
66hp
Engine estimate · from belt
Tracks
Drive
1940–1950
Production years
Allis-Chalmers
Manufacturer
HD7 / 01
At a glance
Production
Agricultural Crawler tractor
Built in Springfield, Illinois, USA
- Manufacturer
- Allis Chalmers
- Total Built
- 1,803
Mechanical
Open operator station.
- Drive
- crawler
HD7 / 02
Under the hood
Engine Detail
General Motors 3-71
blower diesel
3-cylinder
liquid-cooled 2-cycle vertical I-head
- Displacement
- 213 ci3.5 L
- Bore Stroke
- 4.25x5.00 inches108 x 127 mm
- Air Cleaner
- oil bath
- Compression Ratio
- 16.0:1
- Rated Rpm
- 1500
- Starter Volts
- 12
- Coolant Capacity
- 23 qts21.8 L
- Cylinders
- 3
- Cooling
- liquid-cooled 2-cycle vertical I-head
- Oil Capacity
- 8.5 qts8.0 L
Engine Options
General Motors 3.5L 3-cyl diesel
- Fuel Tank
- 31 gal117.3 L
HD7 / 03
Gears & controls
Transmission
- Transmission Type
- sliding gear
- Gears
- 4 forward and 1 reverse
- Oil Capacity
- 21 qts19.9 L
HD7 / 04
Size. Stance. Footprint.
Tires And Tracks
16-inch tracks
- Weight
- 14000 lbs6350 kg
Tires And Tracks
- Width
- 16 inches40 cm
- Length On Ground
- 67 inches170 cm
- Area On Ground
- 2144 in²1.4 m²
- Ground Pressure
- 5.83 psi0.4 bar
HD7 / 05
Tractor Photos
See it in action
Videos
Watch Allis-Chalmers HD7 videos from their original YouTube creators.
HD7 / 07
Tests (NTTL)
Nebraska Tractor Test 360
Diesel 4-speed crawlerOctober 15 - 21, 1940
Drawbar performance
Gear 1 used for power test.
Gear 1 used for pull test.
- Id
- 360
- Belt Power Max
- 68.68 hp51.2 kW
- Belt Fuel Use Max
- 4.8 gal/hour18.2 l/hour
- Max Power
- 57.31 hp42.7 kW
- Max Pull
- 12,171 lbs5520 kg