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Best Thirty Specs ( 1921-1925 )

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Production

Description Agricultural Crawler tractor / Built in San Leandro, California, USA
Manufacturer Best

Engine

Engine type Best 7.6L 4-cyl gasoline
Bore/Stroke 4.75x6.50 inches (121 x 165 mm)
Description Best / gasoline / 4-cylinder / liquid-cooled
Displacement 461 ci (7.6 L)
Rated RPM 850
Belt (tested) 37.83 hp (28.2 kW)
Drawbar (tested) 33.21 hp (24.8 kW)
Plows 4

Transmission

Gears 2 forward and 1 reverse / 3 forward and 1 reverse
Type gear / gear
Transmission type 2-speed gear / 3-speed gear
Transmission type 2-speed gear / 3-speed gear

Mechanical

Cab Open operator station.
Drive crawler

Dimensions & Tires

Height 59 inches (149 cm)
Weight 7400 lbs (3356 kg)
Width 53.25 inches (135 cm)

Belt Pulley

Diameter 12 inches (30 cm)
RPM 800
Speed 2513 ft/min (765.96 meters/min)
Width 7 inches (17 cm)

Dimensions & Tracks

Description Tracks
Weight 7400 lbs (3356 kg)

Nebraska Tractor Test 104

Belt power (max) 37.83 hp (28.2 kW)
Description Drawbar performance
Max power 33.21 hp (24.8 kW)
Max pull 7563 lbs (3430 kg)
Transmission type 3-speed crawlerSeptember 15 - 22, 1924Link: Nebraska Tractor Test 104 file

Nebraska Tractor Test 77

Belt power (max) 30.43 hp (22.7 kW)
Description Drawbar performance
Max power 24.53 hp (18.3 kW)
Max pull 4343 lbs (1969 kg)
Transmission type 2-speed crawlerMay 9 - 20, 1921Link: Nebraska Tractor Test 77 file

Nebraska Tractor Test 99

Belt power (max) 32.55 hp (24.3 kW)
Description Drawbar performance
Max power 25.96 hp (19.4 kW)
Max pull 4930 lbs (2236 kg)
Transmission type 2-speed crawlerSeptember 11 - 24, 1923Link: Nebraska Tractor Test 99 file

Tractor Tests

Description NTTL 77: 2-speed crawler / NTTL 99: 2-speed crawler / NTTL 104: 3-speed crawler