Allis-Chalmers HD14 Specs ( 1939-1947 )
Overview
The Allis-Chalmers HD14 is a farm crawler tractor manufactured in Springfield, Illinois, between 1939 and 1947 with a total production of 6,405 units. It is equipped with a General Motors 7.0L 6-cylinder blower diesel engine and was offered with either a 6-speed sliding gear transmission or a 3-speed torque converter variant known as the HD14C. The tractor has an operating weight of 28,750 pounds and features 22-inch wide tracks providing 3,759 square inches of ground contact area.
Ideal Applications
Nebraska Tractor Test Performance:
In Nebraska Tractor Test 362, the HD14 achieved a maximum belt power of 145.39 hp and a maximum drawbar pull of 28,019 lbs using a 6-speed sliding gear transmission.
Ground Contact and Pressure Specifications:
The crawler drive system utilizes 22-inch tracks with a ground contact length of 85.4 inches, resulting in a ground pressure of 7.39 psi and a total area on ground of 3,759 square inches.
Engine and Fluid Capacities:
The 426 ci liquid-cooled 2-cycle engine features a 16.0:1 compression ratio, a 68-gallon fuel tank, and a 48-quart coolant capacity.
Production
| Description | Built in Springfield, Illinois, USA |
|---|---|
| Manufacturer | Allis Chalmers |
| Total built | 6,405 |
Engine
| Engine type | General Motors 7.0L 6-cyl diesel |
|---|---|
| Fuel tank | 68 gal (257.4 L) |
| Bore/Stroke | 4.25x5.00 inches (108 x 127 mm) |
| Compression | 16.0:1 |
| Coolant capacity | 48 qts (45.4 L) |
| Description | General Motors 6-71 / blower diesel / 6-cylinder / liquid-cooled 2-cycle vertical I-head |
| Displacement | 426 ci (7.0 L) |
| Oil capacity | 14 qts (13.2 L) |
| Rated RPM | 1500 |
| Starter volts | 12 |
| Belt (claimed) | 145 hp (108.1 kW) |
| Belt (tested) | 145.39 hp (108.4 kW) |
| Drawbar (claimed) | 127 hp (94.7 kW) |
| Drawbar (tested) | 126.98 hp (94.7 kW) |
Transmission
| Gears | 6 forward and 2 reverse / 3 forward and 1 reverse |
|---|---|
| Oil capacity | 40 qts (37.9 L) |
| Type | sliding gear / torque converter |
| Transmission type | 6-speed sliding gear / 3-speed torque converter |
| Transmission type | 6-speed sliding gear / 3-speed torque converter |
Mechanical
| Cab | Open operator station. |
|---|---|
| Drive | crawler |
Dimensions & Tires
| Gauge | 68 inches (172 cm) |
|---|---|
| Height | 80 inches (203 cm) |
| Length | 165 inches (419 cm) |
| Operating weight | 28750 lbs (13041 kg) |
| Width | 92 inches (233 cm) |
Allis Chalmers HD14 Tracks
| Area on ground | 3759 in² (2.4 m²) |
|---|---|
| Ground pressure | 7.39 psi (0.5 bar) |
| Length on ground | 85.4 inches (216 cm) |
| Width | 22 inches (55 cm) |
Dimensions & Tracks
| Description | 22-inch tracks |
|---|---|
| Weight | 28750 to 29330 pounds |
HD14 Serial Numbers
| 1939 | 18 |
|---|---|
| 1940 | 26 |
| 1941 | 549 |
| 1942 | 1166 |
| 1943 | 2113 |
| 1944 | 3138 |
| 1945 | 4259 |
| 1946 | 5455 |
| 1947 | 5815 |
| Description | FAQ: How to read a serial number table. |
| Final | 6422 |
| Location: | Behind transmission case, right side |
Nebraska Tractor Test 362
| Belt fuel use (max) | 9.6 gal/hour (36.3 l/hour) |
|---|---|
| Belt power (max) | 145.39 hp (108.4 kW) |
| Description | Diesel 6-speed crawlerOctober 15 - November 5, 1940Link: Nebraska Tractor Test 362 file / Drawbar performance / Gear 2 used for power test. / Gear 1 used for pull test. |
| Max power | 126.98 hp (94.7 kW) |
| Max pull | 28,019 lbs (12709 kg) |
References
| Description | Build a Better Farm published in 1940, by Allis Chalmers |
|---|
Variants
| HD14C | torque converter |
|---|