Leader D
The Leader D is a tractor produced by Leader. It is equipped with a 133 ci 2.2 L engine. The listed engine power is Gasoline (listed): 31 hp / 23.1 kW. Transmission: 3 forward and 1 reverse. Operating weight: 2500 lbs 1134 kg.
Engine Power
Gasoline (listed): 31 hp / 23.1 kW
Fuel & Capacities
Gasoline
Transmission
3 forward and 1 reverse
Operating Weight
2500 lbs
1134 kg
Overview
 | 1947 - 1949
Utility tractor |
|---|
Production | |
|---|---|
Manufacturer | Leader (a part of Leader Tractor Company) |
Utility tractor | |
Built in Auburn, Ohio, USA | |
Leader D Engine | |
|---|---|
Hercules 2.2L 4-cyl gasoline | |
Engine details ...  |
Leader D Transmission | |
|---|---|
3-speed gear | |
Transmission details ...  |
Leader D Power | |
|---|---|
Engine | 31 hp
23.1 kW |
Plows | 2 *12-inch |
Mechanical | |
|---|---|
Two-wheel drive | |
Final drives | chain |
Manual steering | |
Mechanical contracting band brakes | |
Open operator station. | |
Power Take-off (PTO) | |
|---|---|
Rear PTO | transmission |
Rear PTO Type | 540 |
Dimensions & Tires | |
|---|---|
Wheelbase | 70 inches
177 cm |
Weight | 2500 lbs
1134 kg |
Front tire | 5x15 |
Rear tire | 9x24 |
Full dimensions and tires ...  | |
Belt Pulley | |
|---|---|
Diameter | 7 inches
17 cm |
Width | 6.5 inches
16 cm |
RPM | 1510 |
Speed | 2770 ft/min
844.30 meters/min |
Engine
Engine Detail — 133 ci / 2.2 L Gasoline
Manufacturer | Hercules IXB |
Fuel Type | Gasoline |
Configuration | 4-cylinder, liquid-cooled |
Displacement | 133 ci
2.2 L |
Bore/Stroke | 3.25x4.00 inches
83 x 102 mm |
Power | 31 hp
23.1 kW |
Fuel system | Zenith carburetor |
Rated RPM | 1800 |
Starter type | electric |
Transmission
Transmission — 3 forward and 1 reverse gear
Type | gear |
Gears | 3 forward and 1 reverse |
Clutch | mechanical dry disc |
 | |
Dimensions
Leader D Tires | |
|---|---|
Ag front | 5x15 |
Ag rear | 9x24 |
Dimensions | |
|---|---|
Wheelbase | 70 inches
177 cm |
Length | 111 inches
281 cm |
Height | 61 inches
154 cm |
Weight | 2500 lbs
1134 kg |
Ground clearance | 19 inches
48 cm |
Front tread | 48 to 68 inches
121 to 172 cm |
Rear tread | 48 to 64.5 inches
121 to 163 cm |
Photos
1949 Leader Model D tractor.
Recommended Implements & Sizing Guide
Engineering recommendations for Leader D based on its 31 HP power envelope and ASAE agricultural standards.
| Implement & Operation | Recommended Size | Workload Rating | Engineering Notes |
|---|---|---|---|
Moldboard PlowPrimary Tillage | 2 to 3 Bottom (14-16")2 - 3 铧 (35-40 cm) | Medium Duty | Standard utility farm tillage. |
Rotary Cutter / MowerMowing & Clearing | 5 ft (60 in)1.5 m | Medium Duty | Pasture maintenance and weeds up to 1.5" diameter. |
Rotary TillerSeedbed Prep | 54 to 60 in135 - 150 cm | Medium Duty | Thorough seedbed preparation in orchards and vegetable plots. |
Disc HarrowSecondary Tillage | 5 to 6 ft (16-18" discs)1.5 - 1.8 m (40-45 cm 耙片) | Light Duty | Small acreage soil break-up and secondary aeration. |
Sizing & Soil Condition NoteActual implement sizing varies depending on local soil conditions (heavy clay vs sandy loam), field slope, and operating speed. Heavy tillage implements may require front ballast weights and wheel weights.
Fluids, Capacities & Working Autonomy
Standard fluid requirements, service intervals, and continuous runtime estimates for Leader D.
Engine Crankcase Oil
SAE 15W-40 (Heavy Duty Diesel)
Standard Spec: API CK-4 / CJ-4 Heavy Duty
Service Interval: 150 – 250 Hours
Transmission & Hydraulic System
UTTO (Universal Tractor Transmission Oil)
Standard Spec: ISO VG 46 / 68 (Wet Brake & Trans Compatible)
Service Interval: 600 – 1000 Hours
Engine Cooling System
50/50 Ethylene Glycol Pre-mix
Standard Spec: ASTM D6210 / Heavy-Duty OAT Antifreeze
Service Interval: 2 Years / 1500 Hours
Leader D Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for Leader D.
Converted Equivalents:
Horsepower (HP)31 hp
Kilowatts (kW)23.1 kW
Metric Horsepower (PS / CV)31.4 PS
Direct Competitor Comparison
Compare Leader D against same-era industry alternatives in the same horsepower class.
Current Model
Leader
Leader D
Engine Power:Gasoline (listed): 31 hp / 23.1 kW
★ Baseline Reference
International HarvesterMarket Competitor
International Harvester 140
Engine Power:28
Production Years:1958 - 1979
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