Introduction
M-R-S A-90B Four-Wheel Drive Tractor
The M-R-S A-90B is a heavy-duty four-wheel drive tractor produced between 1964 and 1970 in Flora, Mississippi, USA. Designed for demanding agricultural and industrial applications, this machine is recognized for its robust construction and mechanical simplicity.
Engine Specifications
The A-90B is powered by a Cummins C-175 diesel engine. This 6-cylinder, liquid-cooled power unit features a displacement of 464 cubic inches (7.6 liters) and operates at a rated speed of 2200 RPM. The engine utilizes a bore and stroke of 4.44 by 5.00 inches and relies on an electric starter system.
Transmission and Steering
The tractor is equipped with a transmission system providing 10 forward gears and 2 reverse gears, allowing for a range of operational speeds suitable for field work. Maneuverability is facilitated by a power four-wheel steering system, which assists the operator in controlling the vehicle's 4x4 drive configuration.
Dimensions and Chassis
With a wheelbase of 100 inches (254 cm) and a total weight of 21,400 lbs (9,707 kg), the A-90B is a substantial machine built for stability. It features an open operator station and is fitted with 18.4x26 agricultural tires on both the front and rear axles. The track width is set at 75 inches for the front and 81 inches for the rear.
Conclusion
The M-R-S A-90B represents a classic era of American tractor engineering. Its combination of a high-displacement Cummins engine, 4WD traction, and heavy operating weight makes it a durable choice for primary tillage and heavy-duty pulling tasks in agricultural environments.
Production Information of M-R-S, A-90B
- Four-wheel Drive (4WD) tractor
- Built in Flora, Mississippi, USA
| Manufacturer | M-R-S |
|---|
Dimension and Tires Information of M-R-S, A-90B
| Wheelbase | 100 inches [254 cm] |
|---|---|
| Rear tread | 81 inches [205 cm] |
| Front tread | 75 inches [190 cm] |
| Height | 114 inches [289 cm] |
| Weight | 21400 lbs [9707 kg] |
| Ag front | 18.4x26 |
|---|---|
| Ag rear | 18.4x26 |
Engine Specifications of M-R-S, A-90B
- Cummins C-175
- Liquid-cooled
- Diesel
- 6-cylinder
| Rated RPM | 2200 |
|---|---|
| Displacement | 464 ci [7.6 L] |
| Starter type | Electric |
| Bore/Stroke | 4.44x5.00 inches [113 x 127 mm] |
Transmission Information of M-R-S, A-90B
Transmission variants 1
| Gears | 10 forward and 2 reverse |
|---|
Mechanical Specs of M-R-S, A-90B
- Power four-wheel steering
- Open operator station.
| Drive | 4x4 4WD |
|---|
Frequently asked questions
How much horsepower does the M-R-S A-90B have?
The M-R-S A-90B delivers unknown HP.
What years was the M-R-S A-90B produced?
The M-R-S A-90B was produced in 1964-1970.
What engine does the M-R-S A-90B have?
The M-R-S A-90B is powered by a Diesel, 6-cylinder engine.
How much does the M-R-S A-90B weigh?
The M-R-S A-90B weighs 21400 lbs [9707 kg].
Is the M-R-S A-90B 4WD?
The M-R-S A-90B is available in 4WD.