Yanmar AF120
The Yanmar AF120 is a tractor produced by Yanmar. It is equipped with a 61.4 ci 1.0 L engine. The listed engine power is Diesel (listed): 20 hp / 14.9 kW. Transmission: 8 forward and reverse. Operating weight: 1488 lbs 674 kg.
Engine Power
Diesel (listed): 20 hp / 14.9 kW
Fuel & Capacities
5.3 gal
20.1 L
Transmission
8 forward and reverse
Operating Weight
1488 lbs
674 kg
Overview
 | 2002 - 2005
AF100 Series |
|---|
Production | |
|---|---|
Manufacturer | Yanmar |
Yanmar AF120 Engine | |
|---|---|
Yanmar 1.0L 3-cyl diesel | |
Fuel tank | 5.3 gal
20.1 L |
Engine details ...  | |
Yanmar AF120 Transmission | |
|---|---|
8-speed | |
Transmission details ...  |
Yanmar AF120 Power | |
|---|---|
Engine | 20 hp
14.9 kW |
Mechanical | |
|---|---|
Four-wheel drive | |
Steering | manual |
Steering | power OptOptional |
Wet disc brakes | |
Two-post ROPS. | |
Power Take-off (PTO) | |
|---|---|
Clutch | dry disc |
Rear PTO Type | 569/814/1226 (1.375) |
Dimensions & Tires | |
|---|---|
Wheelbase | 54.3 inches
137 cm |
Weight | 1488 lbs
674 kg |
Front tire | 6.00-12 |
Rear tire | 8.30-2 |
Full dimensions and tires ...  | |
Electrical | |
|---|---|
Ground | negative |
Battery volts | 12 |
Battery AH | 45 |
Engine
Engine Detail — 61.4 ci / 1.0 L Diesel
Manufacturer | Yanmar 3TNE74 |
Fuel Type | Diesel |
Configuration | 3-cylinder, liquid-cooled |
Displacement | 61.4 ci
1.0 L |
Power | 20 hp
14.9 kW |
Rated RPM | 2700 |
Starter | electric |
Starter volts | 12 |
Transmission
Transmission — 8 forward and reverse
Gears | 8 forward and reverse |
Clutch | dry disc |
Dimensions
Yanmar AF120 Tires | |
|---|---|
Standard tires (ag) | Front: 6.00-12. Rear: 8.30-2 |
Dimensions | |
|---|---|
Wheelbase | 54.3 inches
137 cm |
Length | 103.5 inches
262 cm |
Width | 41.7 inches
105 cm |
Height | 75.6 inches
192 cm |
Weight | 1488 lbs
674 kg |
Front tread | 33.9 inches
86 cm |
Rear tread | 32.7 inches
83 cm |
Photos
Yanmar AF120 tractor photo
Recommended Implements & Sizing Guide
Engineering recommendations for Yanmar AF120 based on its 20 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 | 4 ft (48 in)1.2 m | Light Duty | Pasture clipping and light brush under 1" diameter. |
Rotary TillerSeedbed Prep | 42 to 48 in105 - 120 cm | Light Duty | Covers compact tractor tire width. |
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 Yanmar AF120.
Estimated Continuous Field Runtime: 5.1 hrs
Approximately 5.1 hours of continuous field operation at ~75% rated power on a full tank (5.3 gal / 20.1 L).
Estimated 75% Load Fuel Burn~1 gal/hr (3.9 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
Yanmar AF120 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for Yanmar AF120.
Converted Equivalents:
Horsepower (HP)20 hp
Kilowatts (kW)14.9 kW
Metric Horsepower (PS / CV)20.3 PS
Direct Competitor Comparison
Compare Yanmar AF120 against same-era industry alternatives in the same horsepower class.
Current Model
Yanmar
Yanmar AF120
Engine Power:Diesel (listed): 20 hp / 14.9 kW
★ Baseline Reference
International HarvesterMarket Competitor
International Harvester 184 Lo-Boy
Engine Power:18
Production Years:1977 - 1980
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