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Massey-Harris 101 Junior

Massey-Harris 101 Junior tractor
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The Massey-Harris 101 Junior is a row-crop tractor produced from 1939 to 1946 by Massey-Harris in Racine, Wisconsin, USA. It was available in gasoline and distillate variants, with export models marked as 102G. The tractor featured Continental 4-cylinder liquid-cooled vertical L-head engines in three sizes (2.0L, 2.3L, and 2.7L) used in different production years. It had a 4-speed gear transmission with 1 reverse, two-wheel drive, manual steering, and an open operator station. The tractor's power output included a claimed 20.5 hp at the drawbar and 26.3 hp at the PTO, with tested drawbar power of 24.65 hp and belt power of 30.56 hp. Dimensions included a wheelbase of 83.5 inches for row-crop and 78 inches for standard, weight of 3400 lbs, and tire sizes of 5.00-15 or 4.75-15 front and 10.00-36 rear. The rear PTO operated at 540 RPM. The tractor could pull 2 plows and had a belt pulley diameter of 13 inches running at 837 RPM.
Massey-Harris 101 Juniortractorspecificationsenginetransmissiondimensionspowerrow-crop tractor
Power29 hp[P]
Founded1939 - 1946
Model101 Junior

Technical Specifications

Detailed specifications and technical data for Massey-Harris 101 Junior

Power

Plows:2
Belt (tested):30.56 hp (22.8 kW)
PTO (claimed):26.3 hp (19.6 kW)
Drawbar (tested):24.65 hp (18.4 kW)
Drawbar (claimed):20.5 hp (15.3 kW)

Engine

Fuel tank:10 gal (37.9 L)
Rated RPM 1:1500
Rated RPM 2:1800
Air cleaner 1:oil bath
Air cleaner 2:oil bath
Bore/Stroke 1:3.00x4.375 inches (76 x 111 mm)
Bore/Stroke 2:3.1875x4.375 inches (81 x 111 mm)
Bore/Stroke 3:3.4375x4.375 inches (87 x 111 mm)
Compression 1:6.7:1
Displacement 1:123.7 ci (2.0 L)
Displacement 2:139.6 ci (2.3 L)
Displacement 3:162 ci (2.7 L)
Engine options:Continental 2.0L 4-cyl gasoline, Continental 2.3L 4-cyl gasoline, Continental 2.7L 4-cyl gasoline
Engine Detail 1:Continental gasoline 4-cylinder liquid-cooled vertical L-head, Original engine, used until 1940.
Engine Detail 2:Continental MFA gasoline 4-cylinder liquid-cooled vertical L-head, Larger engine, used from 1940 to 1943.
Engine Detail 3:Continental gasoline 4-cylinder liquid-cooled vertical L-head, Final engine, used from 1943 to 1946.
Starter volts 1:6
Starter volts 2:6
Coolant capacity 1:11 qts (10.4 L)

Overview

Notes:Massey Harris model 101 Junior gasoline tractors that were destined for the export market were marked as a "102G".
Built in:Racine, Wisconsin, USA
Production years:1939 - 1946

Variants

101 Junior:gasoline
102 Junior:distillate

Mechanical

Drive:Two-wheel drive
Steering:Manual steering
Operator station:Open operator station

Belt Pulley

RPM:837
Speed:2958 ft/min (901.60 meters/min)
Width:6 inches (15 cm)
Diameter:13 inches (33 cm)

Transmission

Type:gear
Gears:4 forward and 1 reverse

Serial Numbers

1939:375001 (row-crop), 377001
1940:376158 (row-crop), 377928
1941:395570 (row-crop), 379550
1942:397637 (row-crop), 379815
1943:398596 (row-crop), 379855
1944:500003 (row-crop), 380641
1945:502434 (row-crop), 382569
1946:503779 (row-crop), 384298
Location:On frame, rear-left side near transmission case

Dimensions & Tires

Weight:3400 lbs (1542 kg)
Rear tire:10.00-36
Wheelbase:83.5 inches (row-crop) (212 cm), 78 inches (standard) (198 cm)
Front tire:5.00-15, 4.75-15
Rear tread:52 to 88 inches (132 to 223 cm) (row-crop), 52 inches (132 cm) (standard)

Power Take-off (PTO)

Rear PTO Type:540 (1.375)