Allis Chalmers HD7
The Allis Chalmers HD7 is a tractor produced by Allis Chalmers. It is equipped with a 213 ci 3.5 L engine. The rated power output is 68.68 hp 51.2 kW. Transmission: 4 forward and 1 reverse. Drive type: crawler. Operating weight: 14000 lbs 6350 kg.
Engine Power
68.68 hp
51.2 kW
Drive & Traction
crawler
Fuel & Capacities
31 gal
117.3 L
Transmission
4 forward and 1 reverse
Operating Weight
14000 lbs
6350 kg
Allis Chalmers HD7 Serial Number & Year Decoder
Find the exact manufacture year of your tractor by checking your chassis serial number below.
Where to Find the Serial NumberThe serial number plate is commonly located on the front frame, tractor transmission housing (right side), or instrument panel badge.
Overview
 | 1940 - 1950
Agricultural Crawler tractor |
|---|---|
1940 - 1950 | |
Agricultural Crawler tractor | |
Production | |
|---|---|
Manufacturer | Allis Chalmers |
Agricultural Crawler tractor | |
Built in Springfield, Illinois, USA | |
Total built | 1,803 |
Allis Chalmers HD7 Engine | |
|---|---|
General Motors 3.5L 3-cyl diesel | |
Fuel tank | 31 gal
117.3 L |
Engine details ...  | |
Allis Chalmers HD7 Transmission | |
|---|---|
4-speed sliding gear | |
Transmission details ...  |
Allis Chalmers HD7 Power | |
|---|---|
Drawbar (claimed) | 45 hp
33.6 kW |
Belt (claimed) | 60 hp
44.7 kW |
Drawbar (tested) | 57.31 hp
42.7 kW |
Belt (tested) | 68.68 hp
51.2 kW |
Performance test details ...  | |
Mechanical | |
|---|---|
Drive | crawler |
Open operator station. | |
Dimensions & Tracks | |
|---|---|
Weight | 14000 lbs
6350 kg |
16-inch tracks | |
Full dimensions and tracks ...  | |
References | |
|---|---|
 | |
HD-7 2-Cycle Diesel published in 1949, by Allis Chalmers | |
Operators Manual Model HD 7 Tractor (T-203E) | |
Build a Better Farm published in 1940, by Allis Chalmers |
Engine
Engine Detail — 213 ci / 3.5 L Diesel
Manufacturer | General Motors 3-71 |
Configuration | 3-cylinder, liquid-cooled 2-cycle vertical I-head |
blower diesel | |
Displacement | 213 ci
3.5 L |
Bore/Stroke | 4.25x5.00 inches
108 x 127 mm |
Air cleaner | oil bath |
Compression | 16.0:1 |
Rated RPM | 1500 |
Starter volts | 12 |
Coolant capacity | 23 qts
21.8 L |
Oil capacity | 8.5 qts
8.0 L |
Allis Chalmers HD7 Engine | |
|---|---|
 |
Transmission
Transmission — 4 forward and 1 reverse sliding gear
Type | sliding gear |
Gears | 4 forward and 1 reverse |
Oil capacity | 21 qts
19.9 L |
 | |
Dimensions
Allis Chalmers HD7 Tracks | |
|---|---|
Width | 16 inches
40 cm |
Length on ground | 67 inches
170 cm |
Area on ground | 2144 in²
1.4 m² |
Ground pressure | 5.83 psi
0.4 bar |
Dimensions | |
|---|---|
Length | 128 inches
325 cm |
Width | 81 inches
205 cm |
Height | 69 inches
175 cm |
Operating weight | 14000 lbs
6350 kg |
Gauge | 52 inches
132 cm |
Tests
Nebraska Tractor Test 360 | |
|---|---|
Diesel 4-speed crawler
October 15 - 21, 1940
Link: Nebraska Tractor Test 360 file | |
Belt power (max) | 68.68 hp
51.2 kW |
Belt fuel use (max) | 4.8 gal/hour
18.2 l/hour |
Drawbar performance | |
Max power | 57.31 hp
42.7 kW |
Gear 1 used for power test. | |
Max pull | 12,171 lbs
5520 kg |
Gear 1 used for pull test. | |
Photos
Allis Chalmers HD7
Related models
Allis Chalmers 175
- Power:
- 69.4
- Production years:
- 1970 - 1980
Allis Chalmers E 30-60
- Power:
- 66.7
- Production years:
- -1 - -1
Allis Chalmers 6060
- Power:
- 70.9
- Production years:
- 1980 - 1984
Allis Chalmers 180
- Power:
- 71.1
- Production years:
- 1967 - 1973
Allis Chalmers D17
- Power:
- 63
- Production years:
- 1957 - 1967