| Manufacturer | M-R-S |
| Price | - |
| Model | A-80B |
| Equipment Type | Four-wheel Drive 4WD Tractors |
| Factory | Flora, Mississippi, USA |
M-R-S A-80B POWER
| Engine | 141 hp/105.1 kW |
| Drawbar (claimed) | 123 hp/91.7 kW |
ENGINE DETAIL
The M-R-S A-80B tractor features a Detroit Diesel 4-71 engine, providing robust power (141 hp) at 2100 RPM with a high torque output of 366 lb-ft at 1600 RPM, making it ideal for heavy-duty applications. Its liquid-cooled system ensures efficient thermal management, though the relatively high oil and coolant capacities (15 qts and 42 qts, respectively) may require additional maintenance considerations. This tractor is well-suited for agricultural and industrial tasks, but potential challenges include ensuring availability of replacement parts for the aging engine model.
| Description | Detroit Diesel 4-71/diesel/4-cylinder/liquid-cooled |
| Displacement | 283.7 ci/4.6 L |
| Bore/Stroke | 4.25x5.00 inches/108 x 127 mm |
| Power | 141 hp/105.1 kW |
| Rated RPM | 2100 |
| Torque | 366 lb-ft/496.3 Nm |
| Torque RPM | 1600 |
| Starter type | electric |
| Oil capacity | 15 qts/14.2 L |
| Coolant capacity | 42 qts/39.7 L |
M-R-S A-80B ENGINE
The M-R-S A-80B tractor features a robust Detroit Diesel 4.6L 4-cylinder engine, providing a good balance of power and fuel efficiency, ideal for medium-duty agricultural applications. Its compact design enhances maneuverability in tighter fields, but the engine's maintenance may require specialized knowledge due to its specific diesel technology. Consider possible challenges related to parts availability and service support, depending on your location and the tractor’s production history.
| Description | Detroit Diesel 4.6L 4-cyl diesel |
TRANSMISSION
The M-R-S A-80B tractor features a robust 20 forward and 4 reverse gear configuration, which enhances its versatility for various agricultural tasks and terrain. The 381mm dry disc clutch provides reliable engagement and disengagement but may require more frequent maintenance under heavy load conditions. Ideal for operations demanding rapid directional changes, such as row crop harvesting, this tractor's gearing and clutch setup can optimize efficiency but necessitates operator skill to manage gear shifting effectively.
| Gears | 20 forward and 4 reverse |
| Clutch | 381mm dry disc |
MECHANICAL
The M-R-S A-80B tractor features a 4x4 power four-wheel drive system, enhancing traction and stability in various terrains. Its 20-speed transmission allows for optimal torque management and adaptability during different agricultural tasks. The open operator station offers increased visibility, though the optional air-conditioned cab may be advantageous for extended comfort in harsh weather conditions, albeit at a potentially higher cost.
| Chassis | 4x4 4WD |
| Steering | power four-wheel |
| Cab | Open operator station. Cab optional with available air-conditioning.. |
| Transmission | 20-speed |
HYDRAULICS
| Pump flow | 20 gpm/75.7 lpm |
M-R-S A-80B TIRES
The M-R-S A-80B tractor features 18.00-26 agricultural tires in both front and rear configurations, with the option for enhanced rear traction using wider 23.1-26 tires. This tire sizing offers strong load-bearing capacity and stability in varied terrains, making it suitable for heavy-duty farming operations. However, the limited tread width may pose challenges in muddy conditions, where wider tires could provide better flotation and traction.
| Ag front | 18.00-26 |
| Ag rear | 18.00-26/23.1-26 |
DIMENSIONS
| Wheelbase | 118 inches/299 cm |
| Length | 195 inches/495 cm |
| Width | 111 inches/281 cm |
| Height | 117 inches/297 cm |
| Max weight | 17000 lbs/7711 kg |
| Ground clearance | 14 inches/35 cm |
| Front tread | 80 inches/203 cm |
| Rear tread | 80 inches/203 cm |
DIMENSIONS & TIRES
The M-R-S A-80B tractor features a 118-inch wheelbase, optimizing stability for various field operations, especially in rough terrain. Its uniform tire sizes (18.4-26) enhance traction and load distribution, but may limit versatility in tire configurations for specific applications. Ideal for tasks requiring balance and stability, this tractor would excel in plowing, tilling, or hauling in agriculture settings.
| Wheelbase | 118 inches/299 cm |
| Front tire | 18.4-26 |
| Rear tire | 18.4-26 |