Tractor · 1946Unverified
Massey-Harris 55
Massey-Harris 55 — Standard-tread tractor · 56 hp. Reference specifications; pending source verification.
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
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.