Massey-Harris

Massey-Harris 21 Colt

The Massey-Harris 21 Colt was produced from 1952 to 1953 as a row-crop tractor built in Racine, Wisconsin, USA. It was essentially the model 20 updated with new sheet metal. Powered by a Continental 2.0L 4-cylinder gasoline engine, it delivered 21.6 hp at the drawbar and 28.34 hp at the belt. The tractor featured a 4-speed gear transmission with a dry disc clutch, two-wheel drive with bevel gear final drives, and manual steering. It had an open operator station and optional Type I rear hitch. The rear PTO was transmission-driven with a 540 rpm type. Dimensions included an 82.7 inch wheelbase, 123.3 inch length, and 65.8 inch height. Tires were 4x15 front and 10x28 rear for agricultural use, with an optional single 6x12 front tire. The belt pulley measured 9.5 inches in diameter and 6.25 inches in width, running at 1224 RPM with a speed of 3044 ft/min.
Power31 hp[B]
Founded1952 - 1953
Model21 Colt

Technical Specifications

Detailed specifications and technical data for Massey-Harris 21 Colt

Power
Plows2 (14-inch)
Belt (claimed)28.34 hp (21.1 kW)
Drawbar (claimed)21.6 hp (16.1 kW)
Tires
Ag rear10x28
Ag front4x15
Single front6x12
Engine
Typegasoline
ModelContinental F124
Coolingliquid-cooled
Cylinders4-cylinder
Rated RPM1800
Bore/Stroke3.00x4.375 inches (76 x 111 mm)
Displacement124 ci (2.0 L)
Mechanical
DriveTwo-wheel drive
Steeringmanual
Final drivesbevel gear
Operator stationOpen operator station
Production
TypeRow-Crop tractor
NotesThe Massey-Harris 21 Colt was essentially the model 20, updated with new sheet metal.
Built inRacine, Wisconsin, USA
Years produced1952 - 1953
Belt Pulley
RPM1224
Speed3044 ft/min (927.81 meters/min)
Width6.25 inches (15 cm)
Diameter9.5 inches (24 cm)
Transmission
Typegear
Gears4 forward and 1 reverse
Clutchdry disc
Tractor hitch
Rear TypeI (optional)
Serial Numbers
19521001
19531417
19542669
Dimensions & Tires
Height65.8 inches (167 cm)
Length123.3 inches (313 cm)
Wheelbase82.7 inches (210 cm)
Rear tread52 to 80 inches (132 to 203 cm)
Ground clearance19.3 inches (49 cm)
Front tread (tricycle)6.7/12.3 inches (17/31 cm)
Front tread (adjustable)52 to 74 inches (132 to 187 cm)
Power Take-off (PTO)
Rear PTOtransmission
Rear PTO Type540