Tractor · 1936Unverified
Massey-Harris Challenger
Massey-Harris Challenger — Row-Crop 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
22.2 kW
Weight
1769 kg
Hover a source tag to verify
Overview
ManufacturerMassey-HarrisReference
Row-Crop tractorReference
Built in Racine, Wisconsin, USAReference
Total built14,000Reference
The Massey-Harris Challenger was the row-crop version of the Pacemaker. These tractors replaced the Wallis 12/20 in Massey's line. The Twin Power feature increased engine rpms to provide additional horsepower for belt work.Reference
Two-wheel driveReference
SteeringmanualReference
Open operator station.Reference
Engine
Massey-Harris 4.1L 4-cyl gasolineReference
Fuel tank68.1 LReference
Aux. fuel6.1 LReference
Drawbar (claimed)14.9 kWReference
Belt (claimed)23.9 kWReference
Drawbar (tested)22.2 kWReference
Belt (tested)26.0 kWReference
Massey-HarrisReference
gasolineReference
4-cylinderReference
liquid-cooled vertical I-headReference
Displacement4.1 LReference
Bore/Stroke98 x 133 mmReference
Rated RPM1200Reference
Rated RPM1400Reference
Coolant capacity18.9 LReference
Image courtesy of Cyrille BrouardReference
Belt power (max)26.0 kWReference
Max power22.2 kWReference
Transmission
4-speed gearReference
TypegearReference
Gears4 forward and 1 reverseReference
Dimensions
Wheelbase198 cmReference
Weight1769 kgReference
Front tire24x4.50Reference
Rear tire52x8.00Reference
Ag front24x4.50 (steel)Reference
Ag rear52x8.00 (steel)Reference
Ag front5.50x16Reference
Ag rear11.25x36Reference
Length328 cmReference
Height147 cmReference
Challenger Serial Number Location
On side of main tractor frame.Reference
Test results
Gasoline October 1937Reference
Belt fuel use (max)14.0 l/hourReference
Drawbar performanceReference
Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.