Overview
The M-R-S A-80B is a powerful American-made four-wheel drive farm tractor featuring a 141 hp Detroit Diesel 4.6L engine and a versatile 20-speed transmission. Built in Flora, Mississippi, this machine is distinguished by its unique power four-wheel steering system and a high-clearance 4x4 design suitable for demanding agricultural tasks.
Ideal Applications
Heavy-Duty Field Work:
With a 141 hp diesel engine and a max weight of 17,000 lbs, this tractor provides the power and traction necessary for intensive primary tillage and pulling heavy implements.
High-Precision Maneuvering:
The power four-wheel steering system and 4x4 drive configuration allow for improved control and agility in the field despite the machine's substantial 195-inch length.
Versatile Speed Management:
The 20-speed transmission with 20 forward and 4 reverse gears allows operators to find the exact ground speed required for various applications, from slow-speed tasks to transport.
Production
| Description | Built in Flora, Mississippi, USA |
|---|---|
| Drive type | Four-wheel Drive (4WD) tractor |
| Manufacturer | M-R-S |
Engine
| Engine type | Detroit Diesel 4.6L 4-cyl diesel |
|---|---|
| Bore/Stroke | 4.25x5.00 inches (108 x 127 mm) |
| Coolant capacity | 42 qts (39.7 L) |
| Description | Detroit Diesel 4-71 / diesel / 4-cylinder / liquid-cooled |
| Displacement | 283.7 ci (4.6 L) |
| Oil capacity | 15 qts (14.2 L) |
| Power | 141 hp (105.1 kW) |
| Rated RPM | 2100 |
| Starter type | electric |
| Torque | 366 lb-ft (496.3 Nm) |
| Torque RPM | 1600 |
| Drawbar (claimed) | 123 hp (91.7 kW) |
Transmission
| Clutch | 381mm dry disc |
|---|---|
| Gears | 20 forward and 4 reverse |
| Transmission type | 20-speed |
Mechanical
| Cab | Open operator station. Cab optional with available air-conditioning.. |
|---|---|
| Description | Power four-wheel steering |
| Drive | 4x4 4WD |
Hydraulics
| Pump flow | 20 gpm (75.7 lpm) |
|---|
Dimensions & Tires
| Front tread | 80 inches (203 cm) |
|---|---|
| Ground clearance | 14 inches (35 cm) |
| Height | 117 inches (297 cm) |
| Length | 195 inches (495 cm) |
| Max weight | 17000 lbs (7711 kg) |
| Rear tread | 80 inches (203 cm) |
| Wheelbase | 118 inches (299 cm) |
| Width | 111 inches (281 cm) |
| Front tire | 18.4-26 |
| Rear tire | 18.4-26 |
| Wheelbase | 118 inches (299 cm) |
| Ag front | 18.4-26 / 18.00-26 |
| Ag rear | 18.4-26 / 18.00-26 |
References
| Description | Red Book 1969 published by Implement & Tractor |
|---|