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Tractor · 1946Unverified

Massey-Harris 55

Name: Massey-Harris 55
Brand: Massey-Harris

Massey-Harris 55 — Standard-tread tractor · 56 hp. Reference specifications; pending source verification.

The Massey-Harris 55 is a compact tractor with a rated output of 56 hp, produced between 1946 and 1955. It features a 4-cylinder diesel liquid-cooled engine, which powers a two-wheel drive system via a 4-speed gearbox. The listed weight of the tractor ranges from 7223 to 7571 pounds. The Massey-Harris 55 is suited to tasks on areas of approximately 200 acres.

Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.

Rated power

56 hp

Max power

39.1 kW

Weight

7223 to 7571 pounds

Catalogue coverage

Variants represented

Richest spec table

122 rows

Recorded power

56 hp

Transmissions

4-speed gear

Production years

1946-1955

Verified variants

No linked source document is currently displayed; verify critical figures with the manufacturer or dealer.

Hover a source tag to verify

Overview

ManufacturerMassey-HarrisReference

Standard-tread tractorReference

Original price was $3,850 in 1955Reference

Two-wheel driveReference

Manual steeringReference

Differential mechanical expanding shoe brakesReference

Open operator station.Reference

Variants

55Kall-fuel engineReference

55Ddiesel engineReference

Westernwide-treadReference

Engine

Continental 6.3L 4-cyl gasolineReference

Continental 6.3L 4-cyl dieselReference

Continental 6.3L 4-cyl all fuelReference

Continental 6.3L 4-cyl LP gasReference

Drawbar (claimed)30.6 kWReference

Plows5Reference

Drawbar (tested)42.9 kWReference

Belt (tested)49.9 kWReference

Continental J382Reference

gasolineReference

4-cylinderReference

liquid-cooledReference

Displacement6.3 LReference

Bore/Stroke114 x 152 mmReference

Air cleaneroil bathReference

Compression5.65:1Reference

Rated RPM1350Reference

StarterelectricReference

Starter volts6Reference

Oil capacity9.5 LReference

Coolant capacity26.5 LReference

Continental J382DReference

dieselReference

liquid-cooled vertical I-headReference

Compression15:1Reference

Starter volts12Reference

all fuelReference

Compression4.5:1Reference

LP gasReference

Belt power (max)44.0 kWReference

Max power39.1 kWReference

Belt power (max)38.9 kWReference

Max power35.5 kWReference

Belt power (max)44.0 kWReference

Max power38.1 kWReference

Belt power (max)49.9 kWReference

Max power42.9 kWReference

Transmission

4-speed gearReference

TypegearReference

Gears4 forward and 1 reverseReference

Clutchdry discReference

PTO & Hydraulics

PTO (claimed)41.8 kWReference

Hydraulic system13.2 LReference

Capacity13.2 LReference

Total flow37.9 lpmReference

Rear PTO Type540 (1.375)Reference

Engine RPM521@1350Reference

Capacities

Fuel104.1 LReference

Dimensions

Standard Wheelbase224 cmReference

Western Wheelbase228 cmReference

Weight7223 to 7571 poundsReference

Front tire7.50x18Reference

Rear tire14-34Reference

Ag front7.50x18Reference

Standard Ag rear14-34Reference

Western Ag rear18-26Reference

Ag rear15-34Reference

Length369 cmReference

Height211 cmReference

Standard Rear tread145 cmReference

Western Rear tread177 cmReference

Gas Operating3276 kgReference

Diesel Operating3434 kgReference

Ballasted4606 kgReference

55 Serial Number Location

On side of tractor frame.Reference

55 Serial Numbers

19461001 (gasoline)Reference

19471116 (gasoline)Reference

19482132 (gasoline)Reference

19493581 (gasoline)Reference

19505468 (gasoline)Reference

19516399 (gasoline)Reference

195210001 (gasoline)Reference

195313017 (gasoline)Reference

195415299 (gasoline)Reference

195517059 (gasoline)Reference

19461001 (all-fuel)Reference

19471013 (all-fuel)Reference

19481554 (all-fuel)Reference

19493033 (all-fuel)Reference

19504078 (all-fuel)Reference

19514808 (all-fuel)Reference

19525503/10001 (all-fuel)Reference

195313017 (all-fuel)Reference

195415299 (all-fuel)Reference

195517059 (all-fuel)Reference

19491001 (diesel)Reference

19501022 (diesel)Reference

19512058 (diesel)Reference

19522822/10001 (diesel)Reference

195313017 (diesel)Reference

195415299 (diesel)Reference

195517059 (diesel)Reference

FAQ: How to read a serial number table.Reference

Test results

NTTL 394: gasoline 4-speed 2WDReference

NTTL 428: tractor fuel 4-speed 2WDReference

NTTL 452: diesel 4-speed 2WDReference

NTTL 455: gasoline 4-speed 2WDReference

Gasoline 4-speed 2WDMay 18 - 27, 1948Link: Nebraska Tractor Test 394 fileReference

Belt fuel use (max)19.7 l/hourReference

Drawbar performanceReference

Gear 3 used for power test.Reference

Max pull2573 kgReference

Gear 1 used for pull test.Reference

Tractor fuel 4-speed 2WDOctober 3 - 14, 1949Link: Nebraska Tractor Test 428 fileReference

Belt fuel use (max)20.1 l/hourReference

Max pull2515 kgReference

Diesel 4-speed 2WDOctober 17 - 26, 1950Link: Nebraska Tractor Test 452 fileReference

Belt fuel use (max)14.8 l/hourReference

Max pull2660 kgReference

Gasoline 4-speed 2WDApril 16 - May 7, 1951Link: Nebraska Tractor Test 455 fileReference

Belt fuel use (max)22.3 l/hourReference

Max pull2892 kgReference

Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.

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