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Massey-Harris GP 15/22

Massey-Harris GP 15/22 tractor
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The Massey-Harris GP 15/22 was produced from 1930 to 1936 as a four-wheel drive (4WD) general purpose tractor. It was the first Massey-Harris designed tractor, built in Racine, Wisconsin, USA, with a total of 3,000 units produced. Powered by a Hercules 3.7L 4-cylinder gasoline engine, it featured a 3-speed gear transmission and 4x4 drive. The tractor had an open operator station and was capable of pulling 2 14-inch plows. It weighed 3,900 lbs and had steel 38x8 tires front and rear. The GP 15/22 was notable for its belt pulley and was priced originally at $1,000.
Massey-Harris GP 15/22Massey-Harris tractors4WD tractorHercules enginefarm tractor specifications
Power-
Founded-
ModelGP 15/22

Technical Specifications

Detailed specifications and technical data for Massey-Harris GP 15/22

Power

Plows:2 (14-inch)
Belt (tested):24.84 hp (18.5 kW)
Belt (claimed):22 hp (16.4 kW)
Drawbar (tested):19.91 hp (14.8 kW)
Drawbar (claimed):15 hp (11.2 kW)

Tires

Rear tire:38x8 steel
Front tire:38x8 steel

Engine

Type:Hercules 3.7L 4-cyl gasoline
Details:Hercules OOC gasoline 4-cylinder liquid-cooled vertical L-head; Displacement 226 ci (3.7 L); Bore/Stroke 4.00x4.50 inches (102 x 114 mm); Air cleaner oil bath; Rated RPM 1200; Coolant capacity 16 qts (15.1 L). The overhead-valve (OHV) Hercules engine replaced the flathead OOC in 1936, the final year of the GP production.
Aux. fuel:1.6 gal (6.1 L)
Fuel tank:14 gal (53.0 L)

Dimensions

Height:55 inches (139 cm)
Length:119 inches (302 cm)
Weight:3,900 lbs (1769 kg)
Rear tread:40 to inches (101 to 0 cm), 60 to inches (152 to 0 cm), 66 to inches (167 to 0 cm), 76 to inches (193 to 0 cm)
Front tread:40 to inches (101 to 0 cm), 60 to inches (152 to 0 cm), 66 to inches (167 to 0 cm), 76 to inches (193 to 0 cm)
Ground clearance:30 inches (76 cm)

Mechanical

Drive:4x4 4WD
Operator station:Open operator station

Production

Built in:Racine, Wisconsin, USA
Description:The Massey-Harris 15/22 GP General Purpose tractor was the first Massey-Harris designed tractor.
Total built:3,000
Manufacturer:Massey-Harris
Original price:$1,000
Years produced:1930 - 1936

Belt Pulley

RPM:802
Speed:2.546 ft/min (0.78 meters/min)
Width:6.5 inches (16 cm)
Diameter:12.125 inches (30 cm)

Transmission

Type:gear
Gears:3 forward and 1 reverse

Serial Numbers

1930:300001
1936:303001
Location:Left-rear of tractor frame