Dimensions
| Kubota L3901 | 2WD | 4WD |
|---|---|---|
| Overall Length | 110.6 in (2810 mm) | 107.9 in (2740 mm) |
| Wheelbase | 63.3 in (1610 mm) | 63.3 in (1610 mm) |
| Overall Width | 55.1 in (1400 mm) | 55.1 in (1400 mm) |
| Overall Height with ROPS | 91.7 in (2330 mm) | 91.7 in (2330 mm) |
| Ground Clearance | 13.6 in (345 mm) | 13.4 in (340 mm) |
| Min Turning Radius (w/ brake) | 94.5 in (2400 mm) | 98.4 in (2500 mm) |
| Front Tread | 41.3 in (1050 mm) | 43.1 in (1095 mm) |
| Rear Tread | 43.8 in (1115 mm) 47.1 in (1195 mm) 50.8 in (1290 mm) |
43.8 in (1115 mm) 47.1 in (1195 mm) 50.8 in (1290 mm) |
Tire Size
| Kubota L3901 | 2WD | 4WD |
|---|---|---|
| Front Tire Size (Ag) | 5-15 | 7.2-16 |
| Front Tire Size (Turf) | 23×8.50-12 | 25×8.50-14 |
| Front Tire Size (Industrial) | N/A | 27×8.50-15 |
| Rear Tire Size (Ag) | 11.2-24 | 11.2-24 |
| Rear Tire Size (Turf) | 13.6-16 | 13.6-16 |
| Rear Tire Size (Industrial) | N/A | 15-19.5 R4 |
Operator Environment
| ROPS | Factory certified two post foldable ROPS with retractable seat belt |
| OPC | Operator presence control system, engine shutoff type |
| Safety Start Switches | PTO / Shuttle (F/DT)/HST Range (HST) Neutral Switches |
| Dashboard | Deluxe dash with analog tachometer, temperature gauge, fuel gauge and LCD hour and error message display |
| Parking Brake | Interlocking brake pedals, and depress pedal and latch with the parking brake lever |
| SMV sign | Slow moving vehicle sign |
Weight
| Operating Weight (2WD, Manual) | 2590 lb (1175 kg) |
| Operating Weight (4WD, Manual) | 2767 lb (1255 kg) |
| Operating Weight (4WD, HST) | 2778 lb (1260 kg) |
| Front Axle Load | 2865 lb (1300 kg) |
| Rear Axle Load | 2865 lb (1300 kg) |
| Rear Wheel Weight (V97000) | 6x 61.6 lb (6x 28 kg) |
| Front Weight (V42000, Option 1) | 7x 44 lb (7x 20 kg) |
| Front Weight (V42000, Option 2) | 7x 55 lb (7x 25 kg) |
Engine Details
| Number Of Cylinders | 3 |
| Engine Make | Kubota |
| Engine Model | Kubota D1803-CR-E4-LB3 / D1803-CR-E4-LB4 |
| Displacement | 111.4 cu in (1.826 L) |
| Bore | 3.43 in (87 mm) |
| Stroke | 4.03 in (102.4 mm) |
| Engine Type | 4 cycle multi valve diesel engine |
| Net Horsepower | 36.3 hp (29.7 kw) |
| Gross Horsepower | 37.5 hp (27.6 kw) |
| PTO Power | 32.1 hp (23.6 kw) / 30.6 hp (22.5 kw) |
| Power Measured @ | 2700 rpm |
| Peak Torque | 83.6 lb ft (113.3 Nm) |
| Torque Measured @ | 1500 rpm |
| Air Cleaner | Dry Paper Single Element |
| Lubrication | Forced lubricaton by trochoidal pump |
| Governor | Electronic control |
| Injection pump | Electronic CRS (Common Rail System) |
| Fuel Filter | 1-Spin on type fuel filter with water separator with manual drain cock |
| Oil Filter | Sheet net and replaceable treated paper element, spin on oil filter |
| Fuel Shutoff | Electric activated engine stop mechanism |
| Throttle | Hand and foot operated throttle / Hand operated throttle |
| Aspiration | Naturally aspirated |
| Emission Standards | US CARB / EPA Tier 4 + EU Stage IIIA |
Electrical System
| Operating Voltage | 12 V |
| Alternator | 40 amps |
| Battery | 12V, CCA 580, RC: 110 min |
| Ground | Negative |
| Starter | 12 V |
| Working Lights | Fender mounted 4-way flashers + Two headlights +Two tail lights with hazard flashers and turn signals |
Transmission
| Kubota L3901 | Manual (2WD/4WD) | HST (4WD) |
|---|---|---|
| Type | Gear shift with synchronized shuttle | Hydrostatic transmission |
| Clutch Type | Dry type dual stage / Dry type single stage with torsion spring: 8.46″ | Dry type single stage with torsion spring 7.87″ |
| Number Of Gears | 8F / 8R | Infinite (3-range) |
| Max Forward Speed | 13.2 mph (21.2 km/h) | 14.1 mph (22.7 km/h) |
| Max Reverse Speed | 13.1 mph (21.1 km/h) | 12.7 mph (20.5 km/h) |
| Steering | Integral type power steering | Integral type power steering |
| Cruise Control | N/A | Mechanical lever, infinite speed control |
| Front Axle | 2WD: Tubular steel, non-adjustable tread spacing 4WD: Bevel gear front axle, non-adjustable tread spacing |
Bevel gear front axle, non-adjustable tread spacing |
| Differential Lock | Rear differential lock standard | Rear differential lock standard |
| Final Drive Type | Helical gear, Flange hub | Helical gear, Flange hub |
| Service Brakes | Mechanical, wet disc type, pedals that can be locked together | Mechanical, wet disc type, pedals that can be locked together |
Hydraulic System
| Type | Open center |
| Pump Type | Tandem pump gear type |
| Hydraulic Pump Output | 6.3 gal/min (23.8 L/min) |
| Power Steering Pump Output | 3.8 gal/min (14.4 L/min) |
| Total Hydraulic Flow | 10.1 gal/min (38.2 L/min) |
| System Pressure | 2347 psi (16200 kPa) |
| Number of Remote Valves | Up to 3 – Self canceling detent valve or float detent valve options |
| Hydraulic Filter | Spin-on hydraulic filter |
3-Point Hitch
| Lift Control Type | Position control |
| Lift Arms | Rigid lower link ends with turnbuckle check chains |
| Right Link Adjustment | Turn Buckle |
| 3-Point Hitch Type | Category I |
| 3 Point Hitch Lift Capacity @ Ends | 1984 lb (900 kg) |
| 3 Point Hitch Lift Capacity @ 24″ | 1433 lb (650 kg) |
PTO (Power Take-Off)
| Kubota L3901 | Gear-Drive | HST |
|---|---|---|
| Rear PTO Type | Live Independent PTO w/ hydraulic clutch | Live Independent PTO w/ hydraulic overrunning clutch |
| Rear PTO Speed | 540 rpm | 540 rpm |
| PTO / Engine RPM | 540 @ 2425 | 540 @ 2580 |
| PTO Horsepower | 32.1 hp (23.6 kw) | 30.6 hp (22.5 kw) |
| Rear PTO Shaft | 1 3/8″ SAE 6-Spline Shaft | 1 3/8″ SAE 6-Spline Shaft |
| PTO Shield | Flip-up type PTO shield | Flip-up type PTO shield |
Drawbar
| Drawbar Type | Fixed / Swinging (optional) |
| Max Drawbar Load | 2200 lb (1000 kg) |
| Max Drawbar Load @ Hitch | 730 lb (330 kg) |
Service Refill Capacities
| Kubota L3901 | 2WD Gear F | 4WD DT | 4WD HST |
|---|---|---|---|
| Fuel Tank Capacity | 11.1 gal (42 L) | 11.1 gal (42 L) | 11.1 gal (42 L) |
| Engine Oil Capacity | 1.8 gal (6.7 L) | 1.8 gal (6.7 L) | 1.8 gal (6.7 L) |
| Cooling System Capacity | 1.6 gal (6 L) | 1.6 gal (6 L) | 1.6 gal (6 L) |
| Transmission Oil Capacity | 7.4 gal (28 L) | 7.5 gal (28.4 L) | 6.2 gal (23.5 L) |
| Front Axle (4WD Bevel Gear Cases) | 1.2 gal (4.5 L) | 1.2 gal (4.5 L) |
Kubota L3901 Attachments
The Kubota L3901 compact tractor is built for versatility, offering a wide range of attachments to tackle virtually any task. For lifting and material handling, the Kubota LA525 Loader delivers dependable power and precision, while the Kubota BH77 Backhoe provides excellent digging capability for trenching and excavation projects.
Kubota LA525 Loader
| A. Maximum Lift Height (to bucket pivot pin) | 94.3 in (2394 mm) |
| B. Maximum Lift Height under Level Bucket | 87.6 in (2224 mm) |
| C. Clearance with Bucket Dumped | 76.2 in (1936 mm) |
| D. Reach at Maximum Lift Height (dumping reach) | 25.4 in (645 mm) |
| E. Maximum Dump angle | 40° |
| F. Reach with Bucket on Ground | 63.7 in (1618 mm) |
| G. Bucket Roll-back angle | 31° |
| H. Digging Depth | 6.9 in (176 mm) |
| I. Overall Height in Carry Position | 51.3 in (1302 mm) |
| U. Lift Capacity (bucket pivot pin, maximum height) | 1082 lb (491 kg) |
| V. Lift Capacity (500 mm forward, maximum height) | 820 lb (372 kg) |
| W. Lift Capacity (bucket pivot pin, 1500 mm height) | 1431 lb (649 kg) |
| X. Lift Capacity (1500 mm height) | 1135 lb (515 kg) |
| Y. Breakout Force (bucket pivot pin) | 2373 lbf (10.55 kN) |
| Z. Breakout Force (500 mm forward) | 1806 lbf (8.03 kN) |
| VV. Bucket Roll-back Force at Maximum Height | 2114 lbf (9.40 kN) |
| XX. Bucket Roll-back Force at 1500 mm | 2618 lbf (11.65 kN) |
| ZZ. Bucket Roll-back Force at Ground level | 2146 lbf (9.55 kN) |
| a. Bucket Length | 19.7 in (500 mm) |
| Raising Time (rated flow) | 2.8 sec |
| Lowering Time (rated flow) | 2.0 sec |
| Bucket Dumping Time (rated flow) | 1.8 sec |
| Bucket Roll-back Time (rated flow) | 2.1 sec |
LA525 Loader Options: 2-Lever Quick Coupler (L2215); 66″ 2-Lever Quick Coupler Square Back Bucket (L2256); 60″ Pin-on Bucket (L2242); 2-Lever Quick Coupler Bale Spear (L2237); 2-Lever Quick Coupler Pallet Fork Frame (L2238); 36″ Pallet Forks (K9048); Bucket Rod Indicator (L2130).
Kubota BH77 Backhoe
The Kubota BH77 Backhoe is a rugged, high-performance digging attachment designed specifically for Kubota compact tractors like the L3901. Built for strength and ease of use, the BH77 offers impressive digging capabilities with a maximum digging depth of around 93.6 inches (2378 mm) and a reach of over 124 inches (3156 mm) from the swing pivot, making it ideal for trenching, landscaping, and small excavation tasks.
The BH77 features a curved boom design, providing excellent visibility to the digging area and easier maneuvering around obstacles. Its hydraulically cushioned cylinders offer smoother operation and reduce shock loads during digging and lifting. The quick-attach subframe design allows the BH77 to be mounted and removed efficiently, minimizing downtime between jobs. With available options like mechanical or hydraulic thumb kits, the BH77 expands its versatility for gripping rocks, logs, or debris.
| A. Transport Height | 80.3 in (2040 mm) |
| B. Stabilizer Spread – Transport | 51.8 in (1315 mm) |
| C. Ground Clearance | 11.5 in (292 mm) |
| E. Overall Width | 54.9 in (1394 mm) |
| F. Maximum Digging Depth | 93.6 in (2378 mm) |
| G. Digging Depth, 2 ft. Flat Bottom | 89.8 in (2280 mm) |
| H. Digging Depth, 8 ft. Flat Bottom | 69.2 in (1758 mm) |
| J. Operating Height, Fully Raised | 119.3 in (3029 mm) |
| K. Loading Height | 65.7 in (1669 mm) |
| L. Loading Reach | 50.8 in (1290 mm) |
| M. Reach from Swing Pivot | 124.3 in (3156 mm) |
| N. Swing Pivot to Rear Axle Center Line | 37.6 in (954 mm) |
| P. Bucket Rotation | 180° |
| R. Stabilizer Spread – Operating | 69.0 in (1753 mm) |
| A3. Angle of Departure (per SAE J1234) | 17.3° |
| U. Leveling Angle | 10.2° |
| Swing Arc | 180° |
| Bucket Digging Force | 3421 lbf (15.22 kN) |
| Dipperstick Digging Force | 2190 lbf (97.38 kN) |
| Boom Cylinder, Extend | 3.5 sec |
| Boom Cylinder, Retract | 3.1 sec |
| Swing Cylinder, From 90° | 2.1 sec |
| Dipperstick Cylinder, Extend | 4.9 sec |
| Dipperstick Cylinder, Retract | 3.4 sec |
| Bucket Cylinder, Extend | 3.2 sec |
| Bucket Cylinder, Retract | 2.5 sec |
| Stabilizer Cylinder, Lower | 2.4 sec |
| Stabilizer Cylinder, Raise | 2.0 sec |
Kubota BH77 Backhoe Buckets: 10″ Bucket (BT1950A); 12″ Bucket (BT1951A); 16″ Bucket (BT1952A); 24″ Bucket (BT1953A).
The L3901 can be easily paired with pallet forks for moving pallets and materials, or a 3-point bale spear for handling hay bales with ease. To maintain fields and pastures, operators can attach a rear rotary cutter, and for soil preparation, a rotary tiller ensures efficient ground breaking. When winter hits, a rear snow blower clears driveways and farmyards quickly, while rear-mounted blades help with grading, scraping, and snow removal. With these attachments, the Kubota L3901 transforms into a true all-season, all-purpose workhorse.
