M-R-S A-90
Power
123 hp
Production
1962-1963
Engine
Diesel, 6-cylinder
Weight
24000 lbs [10886 kg]
Drive
4WD
Introduction
M-R-S A-90 Four-Wheel Drive Tractor
The M-R-S A-90 is a heavy-duty four-wheel drive tractor produced between 1962 and 1963 in Flora, Mississippi, USA. Designed for demanding agricultural applications, this machine is recognized for its robust construction and high-torque engine performance.
Engine and Performance
The tractor is powered by a liquid-cooled, 6-cylinder Cummins JN-130-CI diesel engine. With a displacement of 401 cubic inches (6.6 liters), the engine produces 123 horsepower (91.7 kW) at a rated speed of 2200 RPM. It utilizes an electric starter system and features a bore and stroke of 4.125 by 5.00 inches.
Transmission and Handling
The transmission provides 10 forward gears and 2 reverse gears, allowing for a range of speeds adapted to various field operations. The machine is equipped with power four-wheel steering, which enhances maneuverability despite its significant size and weight. The operator station is of the open type, focusing on visibility and simplicity of control.
Dimensions and Chassis
The A-90 features a 4x4 drive configuration with identical 18.4x26 agricultural tires on both the front and rear axles. It has a wheelbase of 100 inches (254 cm), a ground clearance of 16 inches (40 cm), and a front and rear tread width of 75 inches (190 cm). The tractor maintains substantial stability with a total weight of 24,000 lbs (10,886 kg).
Conclusion
With a drawbar power rating of 90 hp (67.1 kW), the M-R-S A-90 was engineered as a durable workhorse suitable for heavy-duty traction and field tasks requiring consistent power and four-wheel drive traction.
Production Information of M-R-S, A-90
- Four-wheel Drive (4WD) tractor
- Built in Flora, Mississippi, USA
| Manufacturer | M-R-S |
|---|
Dimension and Tires Information of M-R-S, A-90
| Wheelbase | 100 inches [254 cm] |
|---|---|
| Front tread | 75 inches [190 cm] |
| Ground clearance | 16 inches [40 cm] |
| Height | 114 inches [289 cm] |
| Rear tread | 75 inches [190 cm] |
| Weight | 24000 lbs [10886 kg] |
| Ag front | 18.4x26 |
|---|---|
| Ag rear | 18.4x26 |
Engine Specifications of M-R-S, A-90
- Cummins JN-130-CI
- Liquid-cooled
- Diesel
- 6-cylinder
| Power | 123 hp [91.7 kW] |
|---|---|
| Displacement | 401 ci [6.6 L] |
| Rated RPM | 2200 |
| Bore/Stroke | 4.125x5.00 inches [105 x 127 mm] |
| Starter type | Electric |
Transmission Information of M-R-S, A-90
Transmission variants 1
| Gears | 10 forward and 2 reverse |
|---|
Mechanical Specs of M-R-S, A-90
- Power four-wheel steering
- Open operator station.
| Drive | 4x4 4WD |
|---|
Power Information of M-R-S, A-90
| Engine | 123 hp [91.7 kW] |
|---|---|
| Drawbar (claimed) | 90 hp [67.1 kW] |
Where it sits
With 123 HP, the M-R-S A-90 sits just below A-80 (134 HP) in M-R-S's range. Its power puts it in the 91th percentile of 1960s models in our database (709 machines).
Frequently asked questions
How much horsepower does the M-R-S A-90 have?
The M-R-S A-90 delivers 123 HP.
What years was the M-R-S A-90 produced?
The M-R-S A-90 was produced in 1962-1963.
What engine does the M-R-S A-90 have?
The M-R-S A-90 is powered by a Diesel, 6-cylinder engine.
How much does the M-R-S A-90 weigh?
The M-R-S A-90 weighs 24000 lbs [10886 kg].
Is the M-R-S A-90 4WD?
The M-R-S A-90 is available in 4WD.