Tractor · 1940Unverified
Allis Chalmers HD7
Allis Chalmers HD7 — Agricultural Crawler tractor · 45 hp. Reference specifications; pending source verification.
Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.
Rated power
45 hp
Max power
42.7 kW
Weight
6350 kg
Hover a source tag to verify
Overview
ManufacturerAllis ChalmersReference
Agricultural Crawler tractorReference
Built in Springfield, Illinois, USAReference
Total built1,803Reference
DrivecrawlerReference
Open operator station.Reference
Engine
General Motors 3.5L 3-cyl dieselReference
Fuel tank117.3 LReference
Drawbar (claimed)33.6 kWReference
Belt (claimed)44.7 kWReference
Drawbar (tested)42.7 kWReference
Belt (tested)51.2 kWReference
General Motors 3-71Reference
blower dieselReference
3-cylinderReference
liquid-cooled 2-cycle vertical I-headReference
Displacement3.5 LReference
Bore/Stroke108 x 127 mmReference
Air cleaneroil bathReference
Compression16.0:1Reference
Rated RPM1500Reference
Starter volts12Reference
Coolant capacity21.8 LReference
Oil capacity8.0 LReference
Belt power (max)51.2 kWReference
Max power42.7 kWReference
Transmission
4-speed sliding gearReference
Typesliding gearReference
Gears4 forward and 1 reverseReference
Oil capacity19.9 LReference
Dimensions
Weight6350 kgReference
16-inch tracksReference
Length325 cmReference
Width205 cmReference
Height175 cmReference
Operating weight6350 kgReference
Gauge132 cmReference
HD7 Serial Numbers
Location:Serial number stamped on the right-rear of the transmission case or on a plate near the instrument panel.Reference
19403Reference
1941503Reference
19421137Reference
19435403Reference
19445753Reference
19458949Reference
194612091Reference
194713078Reference
194815122Reference
194916752Reference
195018086Reference
FAQ: How to read a serial number table.Reference
Allis Chalmers HD7 Tracks
Width40 cmReference
Length on ground170 cmReference
Area on ground1.4 m²Reference
Ground pressure0.4 barReference
Test results
Diesel 4-speed crawlerOctober 15 - 21, 1940Link: Nebraska Tractor Test 360 fileReference
Belt fuel use (max)18.2 l/hourReference
Drawbar performanceReference
Gear 1 used for power test.Reference
Max pull5520 kgReference
Gear 1 used for pull test.Reference
Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.