International Harvester DF-25
The International Harvester DF-25 is a tractor produced by International Harvester. It is equipped with a 124.7 ci 2.0 L engine. The listed engine power is Diesel (listed): 25 hp / 18.6 kW. Transmission: 4 forward and 1 reverse.
Engine Power
Diesel (listed): 25 hp / 18.6 kW
Fuel & Capacities
11.4 gal
43.1 L
Transmission
4 forward and 1 reverse
Overview
 | 1951 - 1953
Standard-tread tractor |
|---|
Production | |
|---|---|
Manufacturer | International Harvester |
Standard-tread tractor | |
Built in Neuss, Germany | |
Total built | 3,500 |
International Harvester DF-25 Engine | |
|---|---|
International Harvester 2.0L 4-cyl diesel | |
Fuel tank | 11.4 gal
43.1 L |
Engine details ...  | |
International Harvester DF-25 Transmission | |
|---|---|
4-speed gear | |
Transmission details ...  |
International Harvester DF-25 Power | |
|---|---|
Engine | 25 hp
18.6 kW |
Mechanical | |
|---|---|
Two-wheel drive | |
Open operator station. |
Power Take-off (PTO) | |
|---|---|
Rear PTO Type | 540 (1.375) |
Dimensions & Tires | |
|---|---|
Wheelbase | 78.3 inches
198 cm |
Front tire | 5.00-16 |
Rear tire | 11.25-24 |
Full dimensions and tires ...  | |
Engine
Engine Detail — 124.7 ci / 2.0 L Diesel
Manufacturer | International Harvester |
Fuel Type | Diesel |
Configuration | 4-cylinder, liquid-cooled |
Displacement | 124.7 ci
2.0 L |
Bore/Stroke | 3.15x4.00 inches
80 x 102 mm |
Power | 25 hp
18.6 kW |
Compression | 19:1 |
Rated RPM | 1800 |
Starter volts | 12 |
Oil capacity | 6.3 qts
6.0 L |
Coolant capacity | 16.4 qts
15.5 L |
Transmission
Transmission — 4 forward and 1 reverse gear
Type | gear |
Gears | 4 forward and 1 reverse |
With 11.25-24 rear tires. | |
 | |
Dimensions
International Harvester DF-25 Tires | |
|---|---|
Ag front | 5.00-16 |
Ag rear | 11.25-24 |
Dimensions | |
|---|---|
Wheelbase | 78.3 inches
198 cm |
Length | 126 inches
320 cm |
Width | 64.6 inches
164 cm |
Height | 63 inches
160 cm |
Recommended Implements & Sizing Guide
Engineering recommendations for International Harvester DF-25 based on its 25 HP power envelope and ASAE agricultural standards.
| Implement & Operation | Recommended Size | Workload Rating | Engineering Notes |
|---|---|---|---|
Moldboard PlowPrimary Tillage | 1 to 2 Bottom (12")1 - 2 铧 (30 cm) | Light Duty | Ideal for garden plots and light sandy soil. |
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 International Harvester DF-25.
Estimated Continuous Field Runtime: 8.8 hrs
Approximately 8.8 hours of continuous field operation at ~75% rated power on a full tank (11.4 gal / 43.2 L).
Estimated 75% Load Fuel Burn~1.3 gal/hr (4.9 L/hr)
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
International Harvester DF-25 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for International Harvester DF-25.
Converted Equivalents:
Horsepower (HP)25 hp
Kilowatts (kW)18.6 kW
Metric Horsepower (PS / CV)25.3 PS
Direct Competitor Comparison
Compare International Harvester DF-25 against same-era industry alternatives in the same horsepower class.
Current Model
International Harvester
International Harvester DF-25
Engine Power:Diesel (listed): 25 hp / 18.6 kW
★ Baseline Reference
Related models
International Harvester 272
- Power:
- 20
- Production years:
- 1973 - 1976
International Harvester D-320
- Power:
- 20
- Production years:
- 1956 - 1962
International Harvester DED
- Power:
- 20
- Production years:
- 1953 - 1956
International Harvester FG
- Power:
- 20
- Production years:
- 1940 - 1951
International Harvester FS
- Power:
- 20
- Production years:
- 1940 - 1949