Allis Chalmers HD21 - Starting and working
Video by Gilles Auriol - French construction machinery
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Years in Production / 1954–1965
Allis-Chalmers
HD21
Explore the specifications, hardware, and original references for the Allis-Chalmers HD21.
No photo
225hp
Source index power
Tracks
Drive
1954–1965
Production years
Allis-Chalmers
Manufacturer
HD21 / 01
At a glance
Production
Agricultural Crawler tractor
Built in Springfield, Illinois, USA
- Manufacturer
- Allis Chalmers
Mechanical
Contracting band brakes
Open operator station.
- Drive
- crawler
HD21 / 02
Under the hood
Engine Detail
Allis-Chalmers
supercharged diesel
6-cylinder
liquid-cooled vertical I-head
- Displacement
- 844 ci13.8 L
- Bore Stroke
- 5.25x6.50 inches133 x 165 mm
- Power
- 225 hp167.8 kW
- Air Cleaner
- oil bath
- Compression Ratio
- 13.3:1
- Rated Rpm
- 1800
- Starter Volts
- 24
- Coolant Capacity
- 80 qts75.7 L
- Cylinders
- 6
- Cooling
- liquid-cooled vertical I-head
Engine Options
Allis-Chalmers 13.8L 6-cyl diesel
- Fuel Tank
- 135 gal511.0 L
HD21 / 03
Gears & controls
Transmission
- Transmission Type
- torque converter
- Gears
- 2 forward and 1 reverse
HD21 / 04
Size. Stance. Footprint.
Tires And Tracks
Tracks
- Weight
- 45500 lbs20638 kg
See it in action
Videos
Watch Allis-Chalmers HD21 videos from their original YouTube creators.
HD21 / 06
Tests (NTTL)
Nebraska Tractor Test 550
Diesel 2-speed crawlerJuly 6 - 18, 1955
Drawbar performance
- Id
- 550
- Max Power
- 135.12 hp100.8 kW
- Max Pull
- 40563 lbs18399 kg