Muir-Hill 121
Power
120 hp
Production
1972-1983
Engine
Diesel, 6-cylinder
Transmission
Gear
Weight
10700 lbs [4853 kg]
Drive
4WD
From the same series:
Introduction
Muir-Hill 121: Overview of the 4WD Heavy-Duty Tractor
The Muir-Hill 121 is a four-wheel-drive agricultural tractor produced in Manchester, England, between 1972 and 1983. Designed for demanding field operations, this model serves as a core unit in the 111 and 141 series lineup, recognized for its mechanical robustness and stability.
Engine and Performance
The tractor is powered by a Ford 2715E diesel engine, a 6-cylinder liquid-cooled unit with a 6.2-liter displacement. It features direct injection and generates 120 horsepower (89.5 kW) at a rated speed of 2500 RPM. The engine provides a peak torque of 280 lb-ft (379.7 Nm) at 1600 RPM, ensuring consistent pulling power for heavy implements.
Transmission and Drive
Equipped with a gear-type transmission, the Muir-Hill 121 offers 8 forward and 2 reverse gears. The drivetrain is configured as a 4x4 4WD system, utilizing planetary final drives to manage power distribution effectively. The operation is facilitated by a 355.6mm dry disc clutch for the transmission and a hydraulic wet disc clutch for the independent PTO.
Hydraulics and PTO
The machine utilizes an open-center hydraulic system, delivering a pump flow of 11 gpm (41.6 lpm) at a system pressure of 2600 psi (179.3 bar). The rear hitch is a Category II type, featuring both position and draft control for precise implement management. The independent rear PTO operates at 540 and 1000 RPM, engaging at 1750 engine RPM.
Dimensions and Handling
With an operating weight of 10,700 lbs (4,853 kg) and a wheelbase of 75 inches (190 cm), the tractor provides significant stability during operation. It features power steering and hydraulic wet disc brakes for enhanced control. The front and rear treads are adjustable between 64 and 80 inches, allowing for adaptation to various row spacings.
Conclusion
The Muir-Hill 121 is a durable, high-torque tractor suited for heavy-duty traction and field work. Its combination of a reliable Ford power plant, 4WD capability, and mechanical simplicity makes it a relevant choice for agricultural environments requiring consistent performance and longevity.
Production Information of Muir-Hill, 121
- Four-wheel Drive (4WD) tractor
- Built in Manchester, England
| Manufacturer | Muir-Hill |
|---|
Dimension and Tires Information of Muir-Hill, 121
| Wheelbase | 75 inches [190 cm] |
|---|---|
| Front tread | 64 to 80 inches [162 to 203 cm] |
| Weight | 10700 lbs [4853 kg] |
| Length | 156 inches [396 cm] |
| Rear tread | 64 to 80 inches [162 to 203 cm] |
| Width | 82 inches [208 cm] |
| Ag front | 13.6/12x38 |
|---|---|
| Ag rear | 13.6/12x38 |
Engine Specifications of Muir-Hill, 121
- Ford 2715E
- Liquid-cooled
- 6-cylinder
- Diesel
| Fuel system | Direct injection |
|---|---|
| Torque | 280 lb-ft [379.7 Nm] |
| Displacement | 380 ci [6.2 L] |
| Bore/Stroke | 4.22x4.524 inches [107 x 115 mm] |
| Power | 120 hp [89.5 kW] |
| Rated RPM | 2500 |
| Compression | 16:1 |
| Starter volts | 12 |
| Starter | Electric |
| Torque RPM | 1600 |
Transmission Information of Muir-Hill, 121
Transmission variants 1
| Type | Gear |
|---|---|
| Gears | 8 forward and 2 reverse |
| Clutch | 355.6mm dry disc |
Mechanical Specs of Muir-Hill, 121
- Cab standard.
- Hydraulic wet disc brakes
| Drive | 4x4 4WD |
|---|---|
| Final drives | Planetary |
| Steering | Power |
Power Information of Muir-Hill, 121
| Rear PTO | Independent |
|---|---|
| Engine RPM | 540@1750 |
| Engine RPM(optional) | 1000 (1.375) |
| Clutch | Hydraulic wet disc |
| Rear PTO Type | 540 (1.375) |
Hydraulics Specifications of Muir-Hill, 121
| Type | Open center |
|---|---|
| Pressure | 2600 psi [179.3 bar] |
| Pump flow | 11 gpm [41.6 lpm] |
Three-Point Hitch of Muir-Hill, 121
| Rear Type | II |
|---|---|
| Control | Position and draft control |
Electrical System of Muir-Hill, 121
| Charging system | Alternator |
|---|---|
| Battery volts | 12 |
| Battery AH | 128 |
Where it sits
With 120 HP, the Muir-Hill 121 sits between 111 (110 HP) and 141 (145 HP) in Muir-Hill's range. Its power puts it in the 76th percentile of 1970s models in our database (1259 machines).
Frequently asked questions
How much horsepower does the Muir-Hill 121 have?
The Muir-Hill 121 delivers 120 HP.
What years was the Muir-Hill 121 produced?
The Muir-Hill 121 was produced in 1972-1983.
What engine does the Muir-Hill 121 have?
The Muir-Hill 121 is powered by a Diesel, 6-cylinder engine.
What transmission does the Muir-Hill 121 use?
The Muir-Hill 121 uses a Gear transmission.
How much does the Muir-Hill 121 weigh?
The Muir-Hill 121 weighs 10700 lbs [4853 kg].
Is the Muir-Hill 121 4WD?
The Muir-Hill 121 is available in 4WD.