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Leader D 25-40

Leader D 25-40 tractor
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The Leader D 25-40 is a half-track crawler tractor built in 1920 by Leader, a part of Dayton-Dick, in Quincy, Illinois, USA. It features a Doman 13.0L 4-cylinder liquid-cooled kerosene engine with a Holley carburetor and hand crank starter. The tractor has a 2-speed gear transmission with 2 forward and 1 reverse gears. It delivers 25 hp drawbar power and 40 hp belt power, capable of pulling 5-6 14-inch plows. The tractor weighs 6500 lbs and rides on tracks with an open operator station protected by a four-post canopy. The belt pulley diameter is 14 inches with a width of 8 inches, running at 750 RPM and a belt speed of 2750 ft/min.
Leader D 25-40Leader tractor1920 tractorshalf-track crawlerDoman enginefarm tractor specifications
Power44 hp[B]
Founded1916 - 1920
ModelD 25-40

Technical Specifications

Detailed specifications and technical data for Leader D 25-40

Power

Plows:5-6 (14-inch)
Belt (claimed):40 hp (29.8 kW)
Drawbar (claimed):25 hp (18.6 kW)

Engine

Make:Doman
Type:4-cyl kerosene
Cooling:liquid-cooled
Rated RPM:750
Bore/Stroke:6.00x7.00 inches (152 x 178 mm)
Fuel system:Holley carburetor
Displacement:792 ci (13.0 L)
Starter type:hand crank

Mechanical

Drive:half-track
Steering:Manual steering
Operator station:Open operator station with four-post canopy.

Production

Type:Half-track Crawler tractor
Year:1920
Built in:Quincy, Illinois, USA
Original price:$2,895 in 1920

Belt Pulley

RPM:750
Speed:2750 ft/min (838.20 meters/min)
Width:8 inches (20 cm)
Diameter:14 inches (35 cm)

Transmission

Type:gear
Gears:2 forward and 1 reverse

Dimensions & Tires

Width:64 inches (162 cm)
Height:96 inches (243 cm)
Length:153 inches (388 cm)
Weight:6500 lbs (2948 kg)
Rear tire:tracks