Tractor · 1929Unverified
Allis Chalmers U
Allis Chalmers U — Standard-tread tractor · 20 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
20 hp
Max power
19.1 kW
Weight
2086 kg
Hover a source tag to verify
Overview
ManufacturerAllis ChalmersReference
Standard-tread tractorReference
Built in West Allis, Wisconsin, USAReference
Total built19,009Reference
Tractors fitted with factory steel wheels had a 3-speed gearbox, done by removing a shifter fork from the regular transmission. The U was also sold as the United Model U (1929-1931), and was distributed by the United Tractor and Equipment Corporation. United was a group of Fordson dealers who contracted Allis for a new tractor, once Ford stopped North American production of the Fordson.Reference
Two-wheel driveReference
Variants
UstandardReference
UCrow-cropReference
Engine
Continental 4.6L 4-cyl gasolineReference
Waukesha 4.9L 4-cyl gasolineReference
Allis-Chalmers 5.2L 4-cyl gasolineReference
Fuel tank90.8 LReference
Drawbar (claimed)14.9 kWReference
Belt (claimed)23.1 kWReference
Plows3 (14-inch)Reference
Drawbar (tested)22.6 kWReference
Belt (tested)26.1 kWReference
ContinentalReference
gasolineReference
4-cylinderReference
liquid-cooledReference
Displacement4.6 LReference
Bore/Stroke108 x 127 mmReference
Rated RPM1200Reference
Coolant capacity18.9 LReference
Waukesha UMReference
The UM engine was used beginning in 1932, tractor serial number 7405.Reference
Displacement4.9 LReference
Bore/Stroke111 x 127 mmReference
Allis-Chalmers UMReference
Final engine, available in 1936 (SN 12001)Reference
Displacement5.2 LReference
Bore/Stroke114 x 127 mmReference
Belt power (max)26.1 kWReference
Max power19.1 kWReference
Belt power (max)25.4 kWReference
Max power17.8 kWReference
Max power22.6 kWReference
Transmission
3-speedReference
4-speedReference
Gears3 forward and 1 reverseReference
Gears4 forward and 1 reverseReference
The four-speed transmission was offered on tractors equipped with rubber tires.Reference
Dimensions
Weight2086 kgReference
Front tire28x6Reference
Rear tire42x11Reference
Ag front28x6 steelReference
Ag rear42x11 steelReference
Ag front6.00x16Reference
Ag rear12.75x24Reference
Length300 cmReference
Width160 cmReference
Height135 cmReference
U Serial Numbers
Location:Rear of differential, near PTOReference
19291Reference
19301975Reference
19316554Reference
19327262Reference
19337419Reference
19347685Reference
19358063Reference
19369471Reference
193712822Reference
193814855Reference
193915587Reference
194016078Reference
194116722Reference
194217137Reference
194317470Reference
194417802Reference
1945-unknown-Reference
1946-unknown-Reference
194718309, 20174Reference
194818613, 20179, 21000Reference
194920301, 210036, 22018Reference
195020422, 22024Reference
FAQ: How to read a serial number table.Reference
Test results
NTTL 170: Contintental 3-speed 2WDReference
NTTL 237: Waukesha 300 3-speed 2WD steel wheelsReference
NTTL 237: Waukesha 300 3-speed 2WD rubber wheelsReference
Contintental 3-speed 2WDOctober 21 - November 7, 1929Link: Nebraska Tractor Test 170 fileReference
Belt fuel use (max)15.9 l/hourReference
Drawbar performanceReference
Gear 1 used for power test.Reference
Max pull1668 kgReference
Gear 1 used for pull test.Reference
Waukesha 300 3-speed 2WD steel wheelsJuly 15 - August 5, 1935Link: Nebraska Tractor Test 237 fileReference
Belt fuel use (max)15.5 l/hourReference
Gear 2 used for power test.Reference
Max pull1554 kgReference
Waukesha 300 3-speed 2WD rubber wheelsJuly 15 - August 5, 1935Link: Nebraska Tractor Test 237 fileReference
Gear 4 used for power test.Reference
Max pull1112 kgReference
Gear 2 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.