The M-R-S A-90 is a tractor with a rated output of 123 hp, categorising it among the more powerful models in its class. It was manufactured between 1962 and 1963. The tractor features a 6-cylinder diesel liquid-cooled engine, which powers four-wheel drive through a 10-speed gearbox. Its listed weight is 10886 kg, making it suitable for tasks involving approximately 200–800 ac.
Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.
Rated power
123 hp
Weight
10886 kg
Catalogue coverage
Variants represented
2
Richest spec table
30 rows
Recorded power
123 hp
Recorded weight
10886 kg
Transmissions
10-speed
Production years
1962-1963
Verified variants
0
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Overview
ManufacturerM-R-SReference
Four-wheel Drive (4WD) tractorReference
Built in Flora, Mississippi, USAReference
Drive4x4 4WDReference
Power four-wheel steeringReference
Open operator station.Reference
Engine
Cummins 6.6L 6-cyl dieselReference
Engine91.7 kWReference
Drawbar (claimed)67.1 kWReference
Cummins JN-130-CIReference
dieselReference
6-cylinderReference
liquid-cooledReference
Displacement6.6 LReference
Bore/Stroke105 x 127 mmReference
Power91.7 kWReference
Rated RPM2200Reference
Starter typeelectricReference
Transmission
10-speedReference
Gears10 forward and 2 reverseReference
Dimensions
Wheelbase254 cmReference
Weight10886 kgReference
Front tire18.4x26Reference
Rear tire18.4x26Reference
Ag front18.4x26Reference
Ag rear18.4x26Reference
Height289 cmReference
Ground clearance40 cmReference
Front tread190 cmReference
Rear tread190 cmReference
Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.
