Introduction
Memo M451 Utility Tractor
The Memo M451 is a utility tractor produced in Yugoslavia between 1987 and 1988. Designed for general agricultural tasks, this two-wheel-drive machine is built around a robust, air-cooled diesel powertrain, reflecting the engineering standards of the late 1980s for mid-range utility equipment.
Engine and Performance
The tractor is powered by a Deutz F3L912 engine, a 2.8-liter, 3-cylinder diesel unit. This air-cooled engine is rated at 45 hp (33.6 kW) at 2300 RPM. It produces a maximum torque of 121.5 lb-ft (164.8 Nm) at 1500 RPM, providing consistent lugging ability for field operations. The engine utilizes a 17:1 compression ratio and requires 9.5 quarts (9.0 L) of oil for lubrication.
Transmission and Drivetrain
The M451 features a gear-type transmission providing 8 forward and 2 reverse speeds. Power is transferred through a dry disc clutch. The tractor is configured as a two-wheel-drive unit and includes power steering for improved maneuverability. Traction is assisted by a mechanical rear differential lock, which helps maintain forward motion in varying soil conditions.
Hydraulics and PTO
Equipped with an open-center hydraulic system, the M451 provides a pump flow of 9.72 gpm (36.8 lpm) at a system pressure of 2500 psi (172.4 bar). The system can support up to three hydraulic valves. The rear Power Take-Off (PTO) is a live type, operating at 540 RPM when the engine reaches 2077 RPM, standard for driving compatible implements.
Dimensions and Capacity
The tractor has a wheelbase of 78.7 inches (199 cm) and an overall length of 136.6 inches (346 cm). With a weight of 7,714 lbs (3,499 kg), it provides a stable platform for a Category I rear hitch, which offers a lift capacity of 3,600 lbs (1,632 kg). It is fitted with 7.5x16 front tires and 14.9x28 rear tires.
Conclusion
The Memo M451 is a straightforward, mechanically focused utility tractor suited for small to medium-scale agricultural operations. Its air-cooled engine and basic hydraulic interface make it a durable choice for operators prioritizing ease of maintenance and reliable performance in standard field applications.
Production Information of Memo, M451
- Utility tractor
- Built in Yugoslavia
| Manufacturer | Memo |
|---|
Dimension and Tires Information of Memo, M451
| Clearance (rear axle) | 21.65 inches [54 cm] |
|---|---|
| Wheelbase | 78.7 inches [199 cm] |
| Weight | 7714 lbs [3499 kg] |
| Height (steering wheel) | 70 inches [177 cm] |
| Length | 136.6 inches [346 cm] |
| Front tread | 52 to 71.7 inches [132 to 182 cm] |
| Clearance (front axle) | 18 inches [45 cm] |
| Width | 69.3 inches [176 cm] |
| Rear tread | 50 to 67.7 inches [127 to 171 cm] |
| Ag front | 7.5x16 |
|---|---|
| Ag rear | 14.9x28 |
Engine Specifications of Memo, M451
- Deutz F3L912
- Air-cooled
- 3-cylinder
- Diesel
| Compression | 17:1 |
|---|---|
| Torque RPM | 1500 |
| Displacement | 172.45 ci [2.8 L] |
| Bore/Stroke | 3.9x4.7 inches [99 x 119 mm] |
| Power | 45 hp [33.6 kW] |
| Torque | 121.5 lb-ft [164.8 Nm] |
| Rated RPM | 2300 |
| Oil capacity | 9.5 qts [9.0 L] |
| Starter power | 4 hp [3.0 kW] |
| Starter volts | 12 |
Transmission Information of Memo, M451
Transmission variants 1
| Type | Gear |
|---|---|
| Oil capacity | 14.7 qts [13.9 L] |
| Gears | 8 forward and 2 reverse |
| Clutch | Dry disc |
Mechanical Specs of Memo, M451
- Two-wheel drive
- Open operator station. Cab available.
- Mechanical drum brakes
- Power steering
| Differential lock | Mechanical rear |
|---|
Power Information of Memo, M451
| Rear PTO | Live |
|---|---|
| Rear PTO Type | 540 (1.375) |
| Engine RPM | 540@2077 |
Hydraulics Specifications of Memo, M451
| Type | Open center |
|---|---|
| Pump flow | 9.72 gpm [36.8 lpm] |
| Valves | Up to 3 |
| Capacity | 2.6 gal [9.8 L] |
| Pressure | 2500 psi [172.4 bar] |
Three-Point Hitch of Memo, M451
| Rear Type | I |
|---|---|
| Rear lift | 3600 lbs [1632 kg] |
Electrical System of Memo, M451
| Charging system | Alternator |
|---|---|
| Charging amps | 28 |
| Battery volts | 12 |
Where it sits
With 45 HP, the Memo M451 sits just below M452 (50 HP) in Memo's range. Its power puts it in the 31th percentile of 1980s models in our database (2052 machines).
Frequently asked questions
How much horsepower does the Memo M451 have?
The Memo M451 delivers 45 HP.
What years was the Memo M451 produced?
The Memo M451 was produced in 1987-1988.
What engine does the Memo M451 have?
The Memo M451 is powered by a Diesel, 3-cylinder engine.
What transmission does the Memo M451 use?
The Memo M451 uses a Gear transmission.
How much does the Memo M451 weigh?
The Memo M451 weighs 7714 lbs [3499 kg].
Is the Memo M451 4WD?
The Memo M451 is available in 2WD.