Yanmar YM155
Power
15 hp
Production
1976-1979
Engine
Diesel, 2-cylinder
Transmission
Gear
Weight
1057 lbs [479 kg]
Drive
2WD/4WD
Introduction
Yanmar YM155 Sub-Compact Utility Tractor
The Yanmar YM155 is a sub-compact utility tractor manufactured by Yanmar between 1976 and 1979. Designed for small-scale farming, landscaping, and property maintenance, this model is recognized for its durability and compact dimensions, which facilitate operation in confined spaces.
Engine and Performance
The tractor is powered by a liquid-cooled, two-cylinder Yanmar 2TR13A diesel engine. With a displacement of 40.4 cubic inches (0.7 liters) and a compression ratio of 23:1, the engine produces 15 horsepower (11.2 kW) at a rated speed of 2700 RPM. It generates a maximum torque of 28.9 lb-ft (39.2 Nm) at 2200 RPM, providing consistent power for light-duty agricultural tasks.
Transmission and Drivetrain
The YM155 utilizes a gear-type transmission featuring 6 forward and 2 reverse gears, coupled with a 180mm dry disc clutch. The drivetrain is available in either two-wheel or four-wheel drive configurations. Mechanical control is maintained through manual steering and a mechanical rear differential lock, ensuring traction in varied field conditions.
Hydraulics and Hitch
The hydraulic system is an open-center design with a pump flow capacity of 3.8 gallons per minute (14.4 liters per minute). The rear of the tractor is equipped with a Category I hitch, capable of lifting up to 1,210 lbs (548 kg), allowing for the attachment of various implements. The rear Power Take-Off (PTO) operates at 540 RPM at an engine speed of 2540 RPM.
Dimensions and Chassis
The tractor features a wheelbase of 48.8 inches (123 cm) and a ground clearance of 10.4 inches (26 cm). The total weight varies by configuration, with the two-wheel drive model weighing 1,057 lbs (479 kg) and the four-wheel drive version weighing 1,145 lbs (519 kg). The open operator station provides a clear view for the driver during operation.
Conclusion
The Yanmar YM155 serves as a practical solution for tasks requiring a compact and maneuverable machine. Its combination of a 15-horsepower diesel engine, Category I hitch, and dual-drive options makes it suitable for hobby farmers and property owners looking for a reliable, older-generation utility tractor.
Production Information of Yanmar, YM155
- Sub-Compact Utility tractor
- Original price was $5,000 in 1979
| Manufacturer | Yanmar |
|---|
Dimension and Tires Information of Yanmar, YM155
| Rear tread | 27.6 to 33.5 inches [70 to 85 cm] |
|---|---|
| Wheelbase | 48.8 inches [123 cm] |
| Height (hood) | 42.2 inches [107 cm] |
| Height (steering wheel) | 45.7 inches [116 cm] |
| Length | 99.2 inches [251 cm] |
| Ground clearance | 10.4 inches [26 cm] |
| 2WD Weight | 1057 lbs [479 kg] |
| Width | 37.6 inches [95 cm] |
| 4WD Front tread | 29.3 inches [74 cm] |
| 2WD Front tread | 28.7 inches [72 cm] |
| 4WD Weight | 1145 lbs [519 kg] |
| 2WD Standard tires (ag) | Front: 4.50-10. Rear: 8-16 |
|---|---|
| 4WD Standard tires (ag) | Front: 5-12. Rear: 8-16 |
| Ag rear | 8-16 |
Engine Specifications of Yanmar, YM155
- Yanmar 2TR13A
- Liquid-cooled
- 2-cylinder
- Diesel
| Compression | 23:1 |
|---|---|
| Torque RPM | 2200 |
| Displacement | 40.4 ci [0.7 L] |
| Bore/Stroke | 2.953x2.953 inches [75 x 75 mm] |
| Power | 15 hp [11.2 kW] |
| Torque | 28.9 lb-ft [39.2 Nm] |
| Rated RPM | 2700 |
| Oil capacity | 2.1 qts [2.0 L] |
| Starter volts | 12 |
| Firing order | 1-2 |
Transmission Information of Yanmar, YM155
Transmission variants 1
| Type | Gear |
|---|---|
| Gears | 6 forward and 2 reverse |
| Clutch | 180mm dry disc |
Mechanical Specs of Yanmar, YM155
- Two- or four-wheel drive
- Open operator station.
- Mechanical drum brakes
- Manual steering
| Differential lock | Mechanical rear |
|---|
Power Information of Yanmar, YM155
| Clutch | Overrunning |
|---|---|
| Clutch(optional) | 770@2540 |
| Rear PTO Type | 540 (1.375) |
| Engine RPM | 540@2540 |
Hydraulics Specifications of Yanmar, YM155
| Type | Open center |
|---|---|
| Pump flow | 3.8 gpm [14.4 lpm] |
Three-Point Hitch of Yanmar, YM155
| Rear Type | I |
|---|---|
| Rear lift | 1210 lbs [548 kg] |
Electrical System of Yanmar, YM155
| Ground | Negative |
|---|---|
| Battery volts | 12 |
Where it sits
With 15 HP, the Yanmar YM155 sits between YM147 (14 HP) and AF-17 (16 HP) in Yanmar's range. Its power puts it in the 5th percentile of 1970s models in our database (1259 machines).
Frequently asked questions
How much horsepower does the Yanmar YM155 have?
The Yanmar YM155 delivers 15 HP.
What years was the Yanmar YM155 produced?
The Yanmar YM155 was produced in 1976-1979.
What engine does the Yanmar YM155 have?
The Yanmar YM155 is powered by a Diesel, 2-cylinder engine.
What transmission does the Yanmar YM155 use?
The Yanmar YM155 uses a Gear transmission.
How much does the Yanmar YM155 weigh?
The Yanmar YM155 weighs 1057 lbs [479 kg].
Is the Yanmar YM155 4WD?
The Yanmar YM155 is available in 2WD/4WD.