Allis Chalmers HD7 tractor specifications

1940 - 1950

1940 - 1950 Agricultural Crawler tractor

Production

Production Manufacturer:Allis Chalmers
Type:Agricultural Crawler tractor
Factory:Springfield, Illinois, USA
Total built:1,803

Allis Chalmers HD7 Power

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
power test details ...

1940 - 1950

Agricultural Crawler tractor

Nebraska Tractor Test 360

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.

Allis Chalmers HD7 Engine

Allis Chalmers HD7 Engine General Motors 3.5L 3-cyl diesel Fuel tank:31 gal
117.3 L
Engine details ...

1940 - 1950

Agricultural Crawler tractor

Engine Detail

Engine Detail
General Motors 3-71
blower diesel
3-cylinder
liquid-cooled 2-cycle vertical I-head
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

Engine Oil

Engine Oil

Oil capacity:	8.5 qts 8.0 L

Mechanical

Mechanical Chassis:crawler
Cab:Open operator station.
Transmission:4-speed sliding gear
Transmission details ...

1940 - 1950

Agricultural Crawler tractor

Transmission

Transmission
Type:	sliding gear
Gears:	4 forward and 1 reverse
Oil capacity:	21 qts 19.9 L

Speeds

Speeds

Dimensions & Tracks

Dimensions & Tracks Weight:14000 lbs
6350 kg
tracks Full dimensions and tracks ...

1940 - 1950

Agricultural Crawler tractor

Allis Chalmers HD7 Tracks

Dimensions

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

HD7 Serial Numbers

HD7 Serial Numbers Location:Serial number stamped on the right-rear of the transmission case or on a plate near the instrument panel.
1940:3
1941:503
1942:1137
1943:5403
1944:5753
1945:8949
1946:12091
1947:13078
1948:15122
1949:16752
1950:18086

how to read serial numbers...