Massey-Harris Challenger: all source data

All 41 values recorded for this model, as the source lists them and in its units. The spec sheet shows the same data checked, typed and converted.

Overview

Production
Manufacturer	Massey-Harris
(no label)	Row-Crop tractor
(no label)	Built in Racine, Wisconsin, USA
Total built	14,000
(no label)	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.

Engine
(no label)	Massey-Harris 4.1L 4-cyl gasoline
Fuel tank	18 gal \| 68.1 L
Aux. fuel	1.6 gal \| 6.1 L

Transmission
(no label)	4-speed gear

Power
Drawbar (claimed)	20 hp \| 14.9 kW
Belt (claimed)	32 hp \| 23.9 kW
Drawbar (tested)	29.8 hp \| 22.2 kW
Belt (tested)	34.9 hp \| 26.0 kW

Mechanical
(no label)	Two-wheel drive
Steering	manual
(no label)	Open operator station.

Dimensions
Wheelbase	78 inches \| 198 cm
Weight	3900 lbs \| 1769 kg
Front tire	24x4.50
Rear tire	52x8.00

Serial location
(no label)	On side of main tractor frame.

Engine

Engine detail
(no label)	Massey-Harris
(no label)	gasoline
(no label)	4-cylinder
(no label)	liquid-cooled vertical I-head
Displacement	247.7 ci \| 4.1 L
Bore/Stroke	3.875x5.25 inches \| 98 x 133 mm
Rated RPM	1200
Rated RPM	1400
Coolant capacity (Coolant)	20 qts \| 18.9 L

Engine
(no label)	Image courtesy of Cyrille Brouard

Transmission

Transmission
Type	gear
Gears	4 forward and 1 reverse

Dimensions

Tires
Ag front	24x4.50 (steel)
Ag rear	52x8.00 (steel)
Ag front	5.50x16
Ag rear	11.25x36

Dimensions
Wheelbase	78 inches \| 198 cm
Length	129.3 inches \| 328 cm
Height	58 inches \| 147 cm
Weight	3900 lbs \| 1769 kg