Allis Chalmers HD14

The Allis Chalmers HD14 is a tractor produced by Allis Chalmers. It is equipped with a 426 ci 7.0 L engine. The rated power output is 145.39 hp 108.4 kW. Transmission: 3 forward and 1 reverse. Drive type: crawler. Operating weight: 28750 to 29330 pounds.

Overview

	1939 - 1947	1939 - 1947

Production
Manufacturer	Allis Chalmers
Built in Springfield, Illinois, USA
Total built	6,405

Variants
HD14C	torque converter

Allis Chalmers HD14 Engine
General Motors 7.0L 6-cyl diesel
Fuel tank	68 gal 257.4 L
Engine details ...

Allis Chalmers HD14 Power
Drawbar (claimed)	127 hp 94.7 kW
Belt (claimed)	145 hp 108.1 kW
Drawbar (tested)	126.98 hp 94.7 kW
Belt (tested)	145.39 hp 108.4 kW
Performance test details ...

Mechanical
Drive	crawler
Open operator station.

Dimensions & Tracks
Weight	28750 to 29330 pounds
22-inch tracks
Full dimensions and tracks ...

References
Build a Better Farm published in 1940, by Allis Chalmers

Engine

Engine Detail — 426 ci / 7.0 L Diesel

Manufacturer	General Motors 6-71
Configuration	6-cylinder, liquid-cooled 2-cycle vertical I-head
blower diesel
Displacement	426 ci 7.0 L
Bore/Stroke	4.25x5.00 inches 108 x 127 mm
Compression	16.0:1
Rated RPM	1500
Starter volts	12
Oil capacity	14 qts 13.2 L
Coolant capacity	48 qts 45.4 L

Transmission

Transmission options
6-speed sliding gear
3-speed torque converter

Transmission — 6 forward and 2 reverse sliding gear

Type	sliding gear
Gears	6 forward and 2 reverse
Oil capacity	40 qts 37.9 L

Transmission — 3 forward and 1 reverse torque converter

Type	torque converter
Gears	3 forward and 1 reverse

Dimensions

Allis Chalmers HD14 Tracks
Width	22 inches 55 cm
Length on ground	85.4 inches 216 cm
Area on ground	3759 in² 2.4 m²
Ground pressure	7.39 psi 0.5 bar

Dimensions
Length	165 inches 419 cm
Width	92 inches 233 cm
Height	80 inches 203 cm
Operating weight	28750 lbs 13041 kg
	29330 lbs (HD14C) 13304 kg
Gauge	68 inches 172 cm

Tests

Nebraska Tractor Test 362
Diesel 6-speed crawler October 15 - November 5, 1940 Link: Nebraska Tractor Test 362 file
Belt power (max)	145.39 hp 108.4 kW
Belt fuel use (max)	9.6 gal/hour 36.3 l/hour
Drawbar performance
Max power	126.98 hp 94.7 kW
Gear 2 used for power test.
Max pull	28,019 lbs 12709 kg
Gear 1 used for pull test.

Photos

Allis Chalmers HD14

Allis Chalmers HD14

US Navy HD-14 in the Pacific theater during World War II.