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Years in Production / 1930–1936
Massey-Harris
GP
Explore the specifications, hardware, and original references for the Massey-Harris GP.
24hp
Engine estimate · from belt
4x4 Only
Drive
1930–1936
Production years
Massey-Harris
Manufacturer
GP / 01
At a glance
Production
Four-wheel Drive (4WD) tractor
Built in Racine, Wisconsin, USA
The Massey-Harris 15/22 GP General Purpose tractor was the first Massey-Harris designed tractor.
- Manufacturer
- Massey-Harris
- Total Built
- 3,000
- Original Price
- $1,000
Mechanical
Open operator station.
- Drive
- 4x4 4WD
Belt Pulley
- Diameter
- 12.125 inches30 cm
- Width
- 6.5 inches16 cm
- Rpm
- 802
- Speed
- 2.546 ft/min0.78 meters/min
GP / 02
Under the hood
Engine Detail (Option 1)
Hercules OOC
gasoline
4-cylinder
liquid-cooled vertical L-head
- Displacement
- 226 ci3.7 L
- Bore Stroke
- 4.00x4.50 inches102 x 114 mm
- Air Cleaner
- oil bath
- Rated Rpm
- 1200
- Coolant Capacity
- 16 qts15.1 L
- Fuel Type
- gasoline
- Cylinders
- 4
- Cooling
- liquid-cooled vertical L-head
Engine Detail (Option 2)
Hercules OHC
gasoline
4-cylinder
liquid-cooled
The overhead-valve (OHV) Hercules engine replaced the flathead OOC in 1936, the final year of the GP production.
- Displacement
- 226 ci3.7 L
- Bore Stroke
- 4.00x4.50 inches102 x 114 mm
- Rated Rpm
- 1200
- Fuel Type
- gasoline
- Cylinders
- 4
- Cooling
- liquid-cooled
Engine Options
Hercules 3.7L 4-cyl gasoline
- Fuel Tank
- 14 gal53.0 L
- Aux Fuel
- 1.6 gal6.1 L
GP / 03
Gears & controls
Transmission
- Transmission Type
- gear
- Gears
- 3 forward and 1 reverse
GP / 04
Size. Stance. Footprint.
Dimensions
- Length
- 119 in302 cm
- Height
- 55 in139 cm
- Ground clearance
- 30 in76 cm
- Front tread
- 40 in101 cm
- Rear tread
- 40 in101 cm
Dimensions And Tires
- Weight
- 3,900 lbs1769 kg
- Front Tire
- 38x8
- Rear Tire
- 38x8
Tires And Tracks
- Front Ag
- 38x8 steel
- Rear Ag
- 38x8 steel
GP / 05
Tractor Photos
GP / 06
Tests (NTTL)
Nebraska Tractor Test 177
Gasoline 3-speed 4WDMay 5 - 27, 1930
Drawbar performance
Gear 1 used for power test.
Gear 1 used for pull test.
- Id
- 177
- Belt Power Max
- 24.84 hp18.5 kW
- Belt Fuel Use Max
- 3.0 gal/hour11.4 l/hour
- Max Power
- 19.91 hp14.8 kW
- Max Pull
- 3,247 lbs1472 kg
Nebraska Tractor Test 191
Distillate 3-speed 4WDMay 22 - June 12, 1931
Drawbar performance
Gear 2 used for power test.
Gear 1 used for pull test.
- Id
- 191
- Belt Power Max
- 22.50 hp16.8 kW
- Belt Fuel Use Max
- 2.9 gal/hour11.0 l/hour
- Max Power
- 16.79 hp12.5 kW
- Max Pull
- 2,764 lbs1253 kg