Kubota M4950
The Kubota M4950 is a tractor produced by Kubota. It is equipped with a 170.3 ci 2.8 L engine. The listed engine power is Diesel (net): 51 hp / 38.0 kW. Transmission: 12 forward and 4 reverse. Operating weight: 4762 to 5800 pounds.
Engine Power
Diesel (net): 51 hp / 38.0 kW
Fuel & Capacities
18.5 gal
70.0 L
Transmission
12 forward and 4 reverse
Operating Weight
4762 to 5800 pounds
Overview
 | 1983 - 1993
M50 SeriesUtility tractor
M50 Series
Utility tractor |
|---|
Production | |
|---|---|
Manufacturer | Kubota |
Utility tractor | |
Built in Japan | |
Variants | |
|---|---|
M4950F | 2WD |
M4950DT | 4WD |
Kubota M4950 Engine | |
|---|---|
Kubota 2.8L 6-cyl diesel | |
Engine details ...  |
Kubota M4950 Transmission | |
|---|---|
12-speed fully synchronized | |
Transmission details ...  |
Kubota M4950 Power | |
|---|---|
Engine (net) | 51 hp
38.0 kW |
PTO (claimed) | 47 hp
35.0 kW |
Drawbar (tested) | 40.25 hp
30.0 kW |
PTO (tested) | 49.57 hp
37.0 kW |
Performance test details ...  | |
Mechanical | |
|---|---|
Two- or four-wheel drive | |
Differential lock | mechanical rear |
Power steering | |
Differential mechanical wet disc brakes | |
Four-post ROPS. Cab optional with air-conditioning. | |
Capacity | |
|---|---|
Fuel | 18.5 gal
70.0 L |
Hydraulic system | 12.7 gal
48.1 L |
Hydraulics | |
|---|---|
Type | open center |
Capacity | 12.7 gal
48.1 L |
Pressure | 2630 psi
181.3 bar |
Valves | 1 or 2 |
Total flow | 9.25 gpm
35.0 lpm |
Tractor hitch | |
|---|---|
Rear Type | II/I |
Rear lift (at ends) | 3968 lbs
1799 kg |
Rear lift (at 24"/610mm) | 3307 lbs
1500 kg |
Power Take-off (PTO) | |
|---|---|
Rear PTO | independent |
Rear PTO Type | 540 |
Engine RPM | 540@2194 |
Dimensions & Tires | |
|---|---|
2WD Wheelbase | 80.9 inches
205 cm |
4WD Wheelbase | 82.3 inches
209 cm |
Weight | 4762 to 5800 pounds |
Front tire | 6.00-16 |
2WD Rear tire | 14.9-28 |
Full dimensions and tires ...  | |
Electrical | |
|---|---|
Charging system | alternator |
Charging amps | 65 (with cab) |
Battery volts | 12 |
Battery AH | 300 |
References | |
|---|---|
 | |
Front Loaders published in 1988, by Kubota | |
Front Loaders B, L and M-Series published in 1994, by Kubota* | |
Product Catalog published in 1990, by Kubota | |
M-Series published in 1985, by Kubota | |
*Publication contains known errors. |
Engine
Engine Detail — 170.3 ci / 2.8 L Diesel
Manufacturer | Kubota S2800-A |
Fuel Type | Diesel |
Configuration | 6-cylinder, liquid-cooled |
Displacement | 170.3 ci
2.8 L |
Bore/Stroke | 3.35x3.23 inches
85 x 82 mm |
Power (net) | 51 hp
38.0 kW |
Air cleaner | single paper element |
Compression | 21:1 |
Rated RPM | 2600 |
Starter volts | 12 |
Oil capacity | 14.5 qts
13.7 L |
Coolant capacity | 8.7 qts
8.2 L |
Transmission
Transmission — 12 forward and 4 reverse fully synchronized
Type | fully synchronized |
Gears | 12 forward and 4 reverse |
Clutch | dry dual 11.2-inch plate |
Oil capacity | 50.8 qts
48.1 L |
Three gears (1-3) plus reverse in four ranges (A-D). Shifts between gears are synchronized. | |
With 14.9-28 rear tires. | |
 | |
Dimensions
Kubota M4950 Tires | |
|---|---|
2WD Standard tires (ag) | Front: 6.00-16. Rear: 14.9-28 |
4WD Standard tires (ag) | Front: 8.3-24. Rear: 14.9-28 |
Dimensions | |
|---|---|
2WD Wheelbase | 80.9 inches
205 cm |
4WD Wheelbase | 82.3 inches
209 cm |
Length | 144.3 inches
366 cm |
Width | 70.9 inches
180 cm |
Height (steering wheel) | 65 inches
165 cm |
Height (exhaust) | 89.4 inches
227 cm |
2WD Clearance (front axle) | 17.7 inches
44 cm |
4WD Clearance (front axle) | 14 inches
35 cm |
2WD Front tread | 55.9 to 79.5 inches
141 to 201 cm |
4WD Front tread | 55.9 to 63.8 inches
141 to 162 cm |
Rear tread | 55.9 to 79.5 inches
141 to 201 cm |
Kubota M4950 Weight | |
|---|---|
2WD Shipping | 4762 lbs
2160 kg |
4WD Shipping | 5452 lbs
2473 kg |
Operating | 5800 lbs (4WD ROPS)
2630 kg |
Ballasted | 8195 lbs
3717 kg |
Tests
Nebraska Tractor Test 1496 | |
|---|---|
Diesel 12-speed 4WD
Link: Nebraska Tractor Test 1496 file | |
PTO performance | |
Power at rated engine speed | 49.57 hp
37.0 kW |
Fuel use | 3.6 gal/hour
13.6 l/hour |
Power at rated PTO speed | 45.47 hp
33.9 kW |
Fuel use | 3.1 gal/hour
11.7 l/hour |
Drawbar performance | |
Max power | 40.25 hp
30.0 kW |
Fuel use | 3.4 gal/hour
12.9 l/hour |
Max pull | 6,750 lbs
3061 kg |
Photos
Kubota M4950
Recommended Implements & Sizing Guide
Engineering recommendations for Kubota M4950 based on its 51 HP power envelope and ASAE agricultural standards.
| Implement & Operation | Recommended Size | Workload Rating | Engineering Notes |
|---|---|---|---|
Moldboard PlowPrimary Tillage | 2 to 3 Bottom (14-16")2 - 3 铧 (35-40 cm) | Medium Duty | Standard utility farm tillage. |
Rotary Cutter / MowerMowing & Clearing | 6 ft (72 in)1.8 m | Medium Duty | Medium pasture clearing; rear slip-clutch recommended. |
Rotary TillerSeedbed Prep | 66 to 72 in165 - 180 cm | Medium Duty | Standard utility tiller; slip clutch protection required. |
Disc HarrowSecondary Tillage | 7 to 8 ft Tandem Disc2.1 - 2.4 m 对开双排耙 | Medium Duty | Field leveling and clod breaking behind plows. |
Hay BalerHay & Forage | Small Square Baler (14x18")小方捆打捆机 (36x46 cm) | Medium Duty | Classic 2-string baler for horse and small livestock hay. |
Sizing & Soil Condition NoteActual implement sizing varies depending on local soil conditions (heavy clay vs sandy loam), field slope, and operating speed. Heavy tillage implements may require front ballast weights and wheel weights.
Fluids, Capacities & Working Autonomy
Standard fluid requirements, service intervals, and continuous runtime estimates for Kubota M4950.
Estimated Continuous Field Runtime: 7 hrs
Approximately 7 hours of continuous field operation at ~75% rated power on a full tank (18.5 gal / 70 L).
Estimated 75% Load Fuel Burn~2.7 gal/hr (10 L/hr)
Engine Crankcase Oil
SAE 15W-40 (Heavy Duty Diesel)
Standard Spec: API CK-4 / CJ-4 Heavy Duty
Service Interval: 150 – 250 Hours
Transmission & Hydraulic System
UTTO (Universal Tractor Transmission Oil)
Standard Spec: ISO VG 46 / 68 (Wet Brake & Trans Compatible)
Service Interval: 600 – 1000 Hours
Engine Cooling System
50/50 Ethylene Glycol Pre-mix
Standard Spec: ASTM D6210 / Heavy-Duty OAT Antifreeze
Service Interval: 2 Years / 1500 Hours
Kubota M4950 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for Kubota M4950.
Converted Equivalents:
Horsepower (HP)51 hp
Kilowatts (kW)38 kW
Metric Horsepower (PS / CV)51.7 PS
Direct Competitor Comparison
Compare Kubota M4950 against same-era industry alternatives in the same horsepower class.
Current Model
Kubota
Kubota M4950
Engine Power:Diesel (net): 51 hp / 38.0 kW
★ Baseline Reference
International HarvesterMarket Competitor
International Harvester 385
Engine Power:46
Production Years:1985 - 1985
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