Massey-Harris 81 Specs ( 1941-1946 )
Overview
The Massey-Harris 81 is a row-crop farm tractor manufactured between 1941 and 1946, featuring a 2.0L four-cylinder Continental gasoline engine. This 2WD model is equipped with a four-speed unsynchronized gear transmission and was tested at a maximum belt power of 27.07 hp.
Ideal Applications
Tested Performance Metrics:
According to Nebraska Tractor Test 376, the model 81 achieved a maximum drawbar pull of 2,898 lbs and a maximum belt power of 27.07 hp while operating at 1500 RPM.
Powertrain and Engine Specifications:
The tractor is powered by a 123.7 ci liquid-cooled vertical L-head engine utilizing a Marvel-Schebler TSX-28 carburetor and a 12-gallon fuel tank.
Transmission and Chassis Layout:
The 2,895 lb unit features a manual steering open operator station, a dry disc clutch, and four forward gears with one reverse gear.
Production
| Description | Row-Crop tractor |
|---|---|
| Manufacturer | Massey-Harris |
| Original price | $1,121 (1946) |
Engine
| Engine type | Continential 2.0L 4-cyl gasoline |
|---|---|
| Fuel tank | 12 gal (45.4 L) |
| Bore/Stroke | 3.00x4.375 inches (76 x 111 mm) |
| Coolant capacity | 11 qts (10.4 L) |
| Description | Continential F124 / gasoline / 4-cylinder / liquid-cooled vertical L-head |
| Displacement | 123.7 ci (2.0 L) |
| Fuel system | Marvel-Schebler TSX-28 carburetor |
| Rated RPM | 1500 |
| Starter volts | 6 |
| Belt (tested) | 27.07 hp (20.2 kW) |
| Drawbar (claimed) | 16 hp (11.9 kW) |
| Drawbar (tested) | 20.79 hp (15.5 kW) |
| PTO (claimed) | 26 hp (19.4 kW) |
Transmission
| Clutch | dry disc |
|---|---|
| Gears | 4 forward and 1 reverse |
| Transmission type | 4-speed unsynchronized gear |
| Type | unsynchronized gear |
Mechanical
| Cab | Open operator station. |
|---|---|
| Drive type | Two-wheel drive |
| Steering | manual |
Dimensions & Tires
| Height | 58 inches (147 cm) |
|---|---|
| Length | 119 inches (302 cm) |
| Weight | 2,895 lbs (1313 kg) |
| Front tire | 4.00x15 |
| Rear tire | 9.00x32 |
| Weight | 2,895 lbs (1313 kg) |
| Ag front | 4.00x15 |
| Ag rear | 9.00x32 |
81 Serial Number Location
| Description | Left side of tractor frame. |
|---|
81 Serial Numbers
| 1941 | 400001 |
|---|---|
| 1942 | 403168 |
| 1943 | ------ |
| 1944 | 403354 |
| 1945 | 403364 |
| 1946 | 404664 |
| Description | FAQ: How to read a serial number table. |
| Final | 406601 |
Nebraska Tractor Test 376
| Belt fuel use (max) | 2.5 gal/hour (9.5 l/hour) |
|---|---|
| Belt power (max) | 27.07 hp (20.2 kW) |
| Description | Gasoline 4-speed 2WDSeptember 29 - October 20, 1941Link: Nebraska Tractor Test 376 file / Drawbar performance / Gear 3 used for power test. / Gear 1 used for pull test. |
| Max power | 20.79 hp (15.5 kW) |
| Max pull | 2,898 lbs (1314 kg) |
Variants
| 81R | row-crop gasoline |
|---|---|
| 81S | standard gasoline |
| 82 | distillate |