Massey-Harris GP 15/22 Specs ( 1930-1936 )
Overview
The Massey-Harris GP 15/22 is a historic four-wheel drive farm tractor and the first model designed by the manufacturer, produced in Racine, Wisconsin between 1930 and 1936. This 4x4 machine features a 3.7L Hercules engine capable of delivering a tested 19.91 hp at the drawbar and 24.84 hp at the belt, supported by a three-speed gear transmission.
Ideal Applications
Plowing and Field Preparation:
Utilizing its four-wheel drive system and 3,900 lbs of weight, this tractor is specifically rated to pull two 14-inch plows for primary tillage work.
Versatile Row Crop Management:
The 30-inch ground clearance and adjustable front and rear tread widths, ranging from 40 to 76 inches, allow the tractor to be configured for various row spacing requirements.
Stationary Belt Power:
An integrated belt pulley system running at 802 RPM allows owners to leverage the tested 24.84 belt horsepower for powering external farm machinery.
Production
| Description | Built in Racine, Wisconsin, USA / The Massey-Harris 15/22 GP General Purpose tractor was the first Massey-Harris designed tractor. |
|---|---|
| Drive type | Four-wheel Drive (4WD) tractor |
| Manufacturer | Massey-Harris |
| Original price | $1,000 |
| Total built | 3,000 |
Engine
| Aux. fuel | 1.6 gal (6.1 L) |
|---|---|
| Engine type | Hercules 3.7L 4-cyl gasoline |
| Fuel tank | 14 gal (53.0 L) |
| Air cleaner | oil bath |
| Bore/Stroke | 4.00x4.50 inches (102 x 114 mm) / 4.00x4.50 inches (102 x 114 mm) |
| Coolant capacity | 16 qts (15.1 L) |
| Description | Hercules OOC / gasoline / 4-cylinder / liquid-cooled vertical L-head / 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 ci (3.7 L) / 226 ci (3.7 L) |
| Rated RPM | 1200 / 1200 |
| Belt (claimed) | 22 hp (16.4 kW) |
| Belt (tested) | 24.84 hp (18.5 kW) |
| Drawbar (claimed) | 15 hp (11.2 kW) |
| Drawbar (tested) | 19.91 hp (14.8 kW) |
| Plows | 2 (14-inch) |
Transmission
| Gears | 3 forward and 1 reverse |
|---|---|
| Transmission type | 3-speed gear |
| Type | gear |
Mechanical
| Cab | Open operator station. |
|---|---|
| Drive | 4x4 4WD |
Dimensions & Tires
| 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) |
| Height | 55 inches (139 cm) |
| Length | 119 inches (302 cm) |
| 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) |
| Weight | 3,900 lbs (1769 kg) |
| Front tire | 38x8 |
| Rear tire | 38x8 |
| Weight | 3,900 lbs (1769 kg) |
| Ag front | 38x8 steel |
| Ag rear | 38x8 steel |
Belt Pulley
| Diameter | 12.125 inches (30 cm) |
|---|---|
| RPM | 802 |
| Speed | 2.546 ft/min (0.78 meters/min) |
| Width | 6.5 inches (16 cm) |
GP Serial Numbers
| 1930 | 300001 |
|---|---|
| 1936 | 303001 |
| Description | FAQ: How to read a serial number table. |
| Location: | Left-rear of tractor frame. |