Leader D 25-40

Name: Leader D 25-40
Brand: Leader

Power

44 hp[B] hp

Production

1920

Engine

4-cylinder

Transmission

Gear

Weight

6500 lbs [2948 kg]

40–60 HP 1920s

Introduction

Leader D 25-40: The 1920 Half-Track Powerhouse

Step back in time to 1920 and witness the raw power of the Leader D 25-40, a half-track crawler tractor that redefined agricultural capabilities. Manufactured by Leader in Quincy, Illinois, this machine is a testament to early 20th-century engineering prowess, offering a formidable 44 horsepower to tackle the toughest farm jobs.

A Heart of Power: The Doman Engine

At its core, the D 25-40 boasts a robust, liquid-cooled, 4-cylinder Doman engine. With a substantial displacement of 792 cubic inches (13.0 L) and fed by a reliable Holley carburetor, this kerosene-burning giant was designed for endurance. Its rated RPM of 750 ensures consistent power delivery, while the bore and stroke of 6.00x7.00 inches [152 x 178 mm] speak to its heavy-duty construction. Starting is handled by a classic hand crank, adding to its vintage charm.

Traction Redefined: The Half-Track System

Forget conventional wheels; the D 25-40 features a half-track drive system, providing unparalleled traction and stability on challenging terrain. Paired with a straightforward transmission offering 2 forward and 1 reverse gear, this tractor offers the agility needed for various field operations. Manual steering ensures direct control, while the open operator station, complete with a four-post canopy, provides a functional workspace.

Built for the Field: Power and Dimensions

This machine means business, with a claimed drawbar horsepower of 25 hp [18.6 kW] and an impressive belt horsepower of 40 hp [29.8 kW]. It's capable of pulling 5 to 6 (14-inch) plows, making it a true workhorse for its era. Its substantial dimensions – 153 inches [388 cm] in length, 64 inches [162 cm] in width, and 96 inches [243 cm] in height – combined with a weight of 6500 lbs [2948 kg], underscore its robust and stable build.

Conclusion

"The 1920 Leader D 25-40 is more than just a tractor; it's a piece of agricultural history. Originally priced at $2,895, it represented a significant investment in farming technology. For collectors and enthusiasts, this half-track marvel from Quincy, Illinois, USA, offers a unique glimpse into the evolution of farm machinery, combining raw power with innovative design."

Introduction

Production Information of Leader, D 25-40

The production information of the tractor (D 25-40) includes details about its manufacturing.

Original price was $2,895 in 1920

Half-track Crawler tractor

Built in Quincy, Illinois, USA


Manufacturer	Leader (a part of Dayton-Dick)

Dimension and Tires Information of Leader, D 25-40

This section sums up the dimension and tires information of the tractor.


Length	153 inches [388 cm]
Weight	6500 lbs [2948 kg]
Width	64 inches [162 cm]
Height	96 inches [243 cm]


Ag rear	Tracks

Engine Specifications of Leader, D 25-40

Get the specifications for the engine and if different options are available.

Doman

Liquid-cooled

Kerosene

4-cylinder


Fuel system	Holley carburetor
Displacement	792 ci [13.0 L]
Rated RPM	750
Bore/Stroke	6.00x7.00 inches [152 x 178 mm]
Starter type	Hand crank

Transmission Information of Leader, D 25-40Y

Discover all variants of transmission available for this tractor model.

Transmission variants 1


Type	Gear
Gears	2 forward and 1 reverse

Mechanical Specs of Leader, D 25-40Y

This section summarizes all mechanical information such as the brake system and other specifications.

Manual steering

Open operator station with four-post canopy.


Drive	Half-track

Power Information of Leader, D 25-40Y

Discover the power specifications and options available for this tractor model but also PTO (Power Take-off) information.


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

Frequently asked questions

How much horsepower does the Leader D 25-40 have?

The Leader D 25-40 delivers 44 hp[B] HP.

What years was the Leader D 25-40 produced?

The Leader D 25-40 was produced in 1920.

What engine does the Leader D 25-40 have?

The Leader D 25-40 is powered by a 4-cylinder engine.

What transmission does the Leader D 25-40 use?

The Leader D 25-40 uses a Gear transmission.

How much does the Leader D 25-40 weigh?

The Leader D 25-40 weighs 6500 lbs [2948 kg].

More Leader models

25-4044 HP · 1916 - 1920 C 18-3640 HP · 1920 GU 16-3235 HP · 1920 - 1923 N 16-3235 HP · 1919 - 1924 B31 HP · 1945 - 1946 D31 HP · 1947 - 1949 15-2527 HP · 1917 12-1820 HP · 1913 - 1915

View all 11 Leader models →

Compare the Leader D 25-40 with another model

Popular comparisons

vs John Deere 1020 VU vs John Deere 1250 vs Massey Ferguson 1165 vs Massey Ferguson 1445 vs Kubota L4240 vs CaseIH 2120