Fahr HG25
The Fahr HG25 is a tractor produced by Fahr. It is equipped with a 236.9 ci 3.9 L engine. The listed engine power is Engine Detail — 236.9 ci / 3.9 L (listed): 25 hp / 18.6 kW. Transmission: Fahr.
Engine Power
Engine Detail — 236.9 ci / 3.9 L (listed): 25 hp / 18.6 kW
Transmission
Fahr
Overview
 | 1941 - 1944 |
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Production | |
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Manufacturer | Fahr |
Total built | 3194 |
Fahr HG25 Engine | |
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Guldner 3.9L 2-cyl wood gas | |
Engine details ...  |
Fahr HG25 Transmission | |
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5-speed gear | |
Transmission details ...  |
Fahr HG25 Power | |
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Engine | 25 hp
18.6 kW |
Mechanical | |
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Two-wheel drive | |
Manual steering | |
Open operator station. |
Dimensions & Tires | |
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Full dimensions and tires ...  |
Engine
Engine Detail — 236.9 ci / 3.9 L
Manufacturer | Guldner 2Z |
Configuration | 2-cylinder, liquid-cooled |
wood gas | |
Displacement | 236.9 ci
3.9 L |
Power | 25 hp
18.6 kW |
Transmission
Transmission — Fahr
Transmission | Fahr |
Type | gear |
Gears | 5 forward and 1 reverse |
Dimensions
Fahr HG25 Tires |
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Dimensions |
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Recommended Implements & Sizing Guide
Engineering recommendations for Fahr HG25 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 Fahr HG25.
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
Fahr HG25 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for Fahr HG25.
Converted Equivalents:
Horsepower (HP)25 hp
Kilowatts (kW)18.6 kW
Metric Horsepower (PS / CV)25.3 PS
Direct Competitor Comparison
Compare Fahr HG25 against same-era industry alternatives in the same horsepower class.
Current Model
Fahr
Fahr HG25
Engine Power:Engine Detail — 236.9 ci / 3.9 L (listed): 25 hp / 18.6 kW
★ Baseline Reference
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