Overview
The M-R-S A-90B is a 4x4 farm tractor built in Flora, Mississippi, featuring a heavy 21,400-pound frame and a Cummins 7.6L 6-cylinder diesel engine. Produced between 1964 and 1970, this machine is notable for its power four-wheel steering and a 10-speed transmission designed for demanding agricultural tasks.
Ideal Applications
Heavy-Duty Traction:
With a substantial weight of 21,400 lbs and a 4x4 drive system, this tractor is well-suited for high-traction applications requiring significant stability and ground pressure.
Advanced Maneuverability:
The power four-wheel steering system allows for enhanced control and handling of this large-scale machine during field operations.
Versatile Speed Management:
A 10-speed transmission providing 10 forward and 2 reverse gears allows the operator to select the most efficient gear ratio for various farming requirements.
Production
| Description | Built in Flora, Mississippi, USA |
|---|---|
| Drive type | Four-wheel Drive (4WD) tractor |
| Manufacturer | M-R-S |
Engine
| Engine type | Cummins 7.6L 6-cyl diesel |
|---|---|
| Bore/Stroke | 4.44x5.00 inches (113 x 127 mm) |
| Description | Cummins C-175 / diesel / 6-cylinder / liquid-cooled |
| Displacement | 464 ci (7.6 L) |
| Rated RPM | 2200 |
| Starter type | electric |
Transmission
| Gears | 10 forward and 2 reverse |
|---|---|
| Transmission type | 10-speed |
Mechanical
| Cab | Open operator station. |
|---|---|
| Description | Power four-wheel steering |
| Drive | 4x4 4WD |
Dimensions & Tires
| Front tread | 75 inches (190 cm) |
|---|---|
| Height | 114 inches (289 cm) |
| Rear tread | 81 inches (205 cm) |
| Weight | 21400 lbs (9707 kg) |
| Wheelbase | 100 inches (254 cm) |
| Front tire | 18.4x26 |
| Rear tire | 18.4x26 |
| Weight | 21400 lbs (9707 kg) |
| Wheelbase | 100 inches (254 cm) |
| Ag front | 18.4x26 |
| Ag rear | 18.4x26 |