Production years
1946-1955
Massey Harris tractor ยท 1946-1955
Massey Harris 55 Tractor
The Massey Harris 55 is a heavy standard-tread field tractor built from 1946 to 1955, with up to 56 PTO horsepower claimed in petrol form. Its large Continental four-cylinder engine and substantial weight made it a serious five-plough tractor for its day.
Engine
Continental 6.3L, 4-cylinder petrol, diesel, all-fuel, or LP gas
Power
56 PTO hp claimed; 57.55 drawbar hp tested
Weight
About 3,275-3,435 kg
Massey Harris 55 specifications
| Production years | 1946-1955 |
|---|---|
| Engine | Continental 6.3L, 4-cylinder petrol, diesel, all-fuel, or LP gas |
| Power | 56 PTO hp claimed; 57.55 drawbar hp tested |
| Transmission | 4-speed gear |
| Weight | About 3,275-3,435 kg |
| Fuel type | Petrol, diesel, all-fuel, or LP gas |
| PTO | 540 rpm rear PTO |
| Hydraulics | 10 gpm total flow |
What the 55 is used for
The 55 was built for open-field work, including ploughing, disking, heavy drawbar work, and belt-powered equipment. Its standard-tread layout and mass favored traction and sustained field work over close row-crop cultivation.
Why the Massey Harris 55 stands out
The Model 55 is one of the best-known large Massey Harris tractors. Its imposing design, strong pulling reputation, and multiple fuel versions make it particularly appealing to collectors and antique-pulling enthusiasts.
Buying a used Massey Harris 55
Identify the fuel version before buying, then inspect the engine for cracks, cooling problems, oil-pressure issues, and evidence of poor fuel-system maintenance. Test the clutch, four-speed transmission, PTO, brakes, steering, and final drives, and look for damaged castings or missing model-specific sheet metal.
Massey Harris 55 frequently asked questions
How much horsepower does a Massey Harris 55 have?
The petrol version was claimed at 56 PTO horsepower, while a commonly cited Nebraska test recorded 57.55 drawbar horsepower.
What years was the Massey Harris 55 made?
It was produced from 1946 through 1955.
Are parts available for a Massey Harris 55?
Many service and engine parts remain available through vintage-tractor suppliers, but complete, correct cosmetic and fuel-system parts may require more searching.
Specifications are commonly cited figures for general reference; exact figures vary by year and serial number, so confirm against TractorData.com and the machine's records. Used tractor values vary by condition and region. Page updated 19 Sep 2026.