Overview
The M-R-S A-85 is a four-wheel drive farm tractor produced in Flora, Mississippi, between 1977 and 1980. It is powered by a 5.2L Detroit Diesel 6-cylinder engine rated at 202 horsepower and features a 20-speed transmission system. The machine is built with power four-wheel steering and has a total listed weight of 17,300 pounds.
Ideal Applications
Engine and Power Ratings:
The Detroit Diesel 6V-53N liquid-cooled engine displacement is 318.4 cubic inches and delivers a claimed drawbar power of 164 horsepower at 2500 rated RPM.
Mechanical and Transmission Layout:
The tractor is equipped with a 4x4 four-wheel drive system and a 20-speed transmission providing 20 forward and 4 reverse gears.
Chassis and Tire Dimensions:
The unit features a 118-inch wheelbase and 23.1x26 agricultural tires on both front and rear, with 14 inches of ground clearance and an overall width of 111 inches.
Production
| Description | Built in Flora, Mississippi, USA |
|---|---|
| Drive type | Four-wheel Drive (4WD) tractor |
| Manufacturer | M-R-S |
Engine
| Engine type | Detroit Diesel 5.2L 6-cyl diesel |
|---|---|
| Bore/Stroke | 3.875x4.50 inches (98 x 114 mm) |
| Description | Detroit Diesel 6V-53N / diesel / 6-cylinder / liquid-cooled |
| Displacement | 318.4 ci (5.2 L) |
| Power | 202 hp (150.6 kW) |
| Rated RPM | 2500 |
| Starter type | electric |
| Drawbar (claimed) | 164 hp (122.3 kW) |
Transmission
| Gears | 20 forward and 4 reverse |
|---|---|
| Transmission type | 20-speed |
Mechanical
| 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 (cab) | 132 inches (335 cm) |
| Length | 195 inches (495 cm) |
| Rear tread | 80 inches (203 cm) |
| Weight | 17300 lbs (7847 kg) |
| Wheelbase | 118 inches (299 cm) |
| Width | 111 inches (281 cm) |
| Front tire | 23.1x26 |
| Rear tire | 23.1x26 |
| Weight | 17300 lbs (7847 kg) |
| Wheelbase | 118 inches (299 cm) |
| Ag front | 23.1x26 |
| Ag rear | 23.1x26 |