M-R-S A-80B
Power
141 hp
Production
1967-1980
Engine
Detroit Diesel 4-71, 4-cylinder
Weight
17000 lbs [7711 kg]
Drive
4WD
Introduction
M-R-S A-80B Four-Wheel Drive Tractor
The M-R-S A-80B is a heavy-duty four-wheel drive tractor produced between 1967 and 1980 in Flora, Mississippi, USA. Designed for demanding agricultural and traction tasks, this model is recognized for its robust construction and mechanical reliability.
Engine and Performance
The tractor is powered by a Detroit Diesel 4-71 liquid-cooled four-cylinder engine with a 4.6-liter displacement. It delivers a rated power of 141 hp (105.1 kW) at 2100 RPM, with a maximum torque output of 366 lb-ft (496.3 Nm) reached at 1600 RPM. The engine cooling system has a capacity of 39.7 liters, while the oil system holds 14.2 liters.
Transmission and Drivetrain
The drivetrain features a 4x4 configuration with power four-wheel steering, providing enhanced maneuverability and traction. The transmission offers 20 forward and 4 reverse gears, allowing for precise speed selection depending on the operational requirements. Power is managed through a 381 mm dry disc clutch.
Hydraulics and Dimensions
The hydraulic system is equipped with a pump providing a flow rate of 20 gpm (75.7 lpm). The tractor has a wheelbase of 118 inches (299 cm) and a total length of 195 inches (495 cm). With a ground clearance of 14 inches (35 cm) and a maximum weight of 17,000 lbs (7,711 kg), the A-80B is engineered for stability on varied terrain.
Operator Environment
The standard configuration features an open operator station designed for high visibility. For extended operation in various weather conditions, an optional cab with air-conditioning was available to improve operator comfort.
Conclusion
The M-R-S A-80B is a specialized four-wheel drive machine suited for heavy-duty agricultural operations requiring significant traction and consistent engine torque. Its durable design and mechanical specifications reflect the engineering standards of its production era.
Production Information of M-R-S, A-80B
- Four-wheel Drive (4WD) tractor
- Built in Flora, Mississippi, USA
| Manufacturer | M-R-S |
|---|
Dimension and Tires Information of M-R-S, A-80B
| Front tread | 80 inches [203 cm] |
|---|---|
| Wheelbase | 118 inches [299 cm] |
| Max weight | 17000 lbs [7711 kg] |
| Height | 117 inches [297 cm] |
| Length | 195 inches [495 cm] |
| Rear tread | 80 inches [203 cm] |
| Ground clearance | 14 inches [35 cm] |
| Width | 111 inches [281 cm] |
| Ag front | 18.4-26 |
|---|---|
| Ag rear | 18.00-26 |
| Ag rear(optional) | 23.1-26 |
| Ag rear | 18.4-26 |
| Ag rear(optional) | 23.1-26 |
| Ag front | 18.00-26 |
Engine Specifications of M-R-S, A-80B
- Detroit Diesel 4-71
- Liquid-cooled
- Diesel
- 4-cylinder
| Starter type | Electric |
|---|---|
| Displacement | 283.7 ci [4.6 L] |
| Rated RPM | 2100 |
| Bore/Stroke | 4.25x5.00 inches [108 x 127 mm] |
| Coolant capacity | 42 qts [39.7 L] |
| Oil capacity | 15 qts [14.2 L] |
| Torque RPM | 1600 |
| Torque | 366 lb-ft [496.3 Nm] |
| Power | 141 hp [105.1 kW] |
Transmission Information of M-R-S, A-80B
Transmission variants 1
| Gears | 20 forward and 4 reverse |
|---|---|
| Clutch | 381mm dry disc |
Mechanical Specs of M-R-S, A-80B
- Power four-wheel steering
- Open operator station. Cab optional with available air-conditioning..
| Drive | 4x4 4WD |
|---|
Power Information of M-R-S, A-80B
| Engine | 141 hp [105.1 kW] |
|---|---|
| Drawbar (claimed) | 123 hp [91.7 kW] |
Hydraulics Specifications of M-R-S, A-80B
| Pump flow | 20 gpm [75.7 lpm] |
|---|
Where it sits
With 141 HP, the M-R-S A-80B sits between A-80 (134 HP) and A-95 (186 HP) in M-R-S's range. Its power puts it in the 94th percentile of 1960s models in our database (709 machines).
Frequently asked questions
How much horsepower does the M-R-S A-80B have?
The M-R-S A-80B delivers 141 HP.
What years was the M-R-S A-80B produced?
The M-R-S A-80B was produced in 1967-1980.
What engine does the M-R-S A-80B have?
The M-R-S A-80B is powered by a Detroit Diesel 4-71, 4-cylinder engine.
How much does the M-R-S A-80B weigh?
The M-R-S A-80B weighs 17000 lbs [7711 kg].
Is the M-R-S A-80B 4WD?
The M-R-S A-80B is available in 4WD.