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Kubota L3901HST Tractor

The Kubota L3901HST is a 4-wheel drive compact utility tractor. This model was manufactured between 2014 and 2021. The Kubota L3901HST driveline includes a 111.4 cubic inches (1.8 L) Kubota D1803-CR-E4 4-cycle 3-cylinder direct injection naturally aspirated liquid-cooled diesel engine with a rated power of 37.5 hp (28.1 kW), and 3-range hydrostatic transmission with infinite forward and reverse gears.

Max travel speed (forward/reverse): 3.9 mph (6.3 km/h) using low range or 14.1 mph (27.2 km/h) using high range, and 3.5 mph (5.6 km/h) using low range or 12.7 mph (20.5 km/h) using high range.

The open center hydraulic system includes a gear pump with fluid flow rate of 6.3 gpm (23.9 lpm). The main relief pressure is 162 bar (2350 psi). The Kubota L3901HST is equipped with an integral power steering system, wet disc brakes, 7.2x16 (AG) or 27x8.50-15 (Industrial) front tires, and 11.2x24 (AG) or 15x19.5 (Industrial) rear tires. The wheel base is 63.3" (1610 mm). The tractor is compatible with a Kubota LA525 front-end loader with lift capacity to full height of 1131 lbs (513 kg), and Kubota BH77 backhoe with 2-ft flat digging depth of 89.8" (2280 mm).

Engine Model Kubota D1803-CR-E4
Engine Type 4-cycle vertical direct injection diesel
Number of Cylinders 3
Total Displacement, cu in (L) 111.4 (1.83)
Cylinder Bore, in (mm) 3.43 (87.0)
Piston Stroke, in (mm) 4.03 (102.4)
Aspiration Naturally aspirated
Rated Engine Power, hp (kW) 37.5 (28.1)
Rated Engine Speed, rpm 2700
Low Idle Speed, rpm 900
Maximum Torque, Nm (lb-ft) 115.8 (85.4)
Torque Speed, rpm 1500
Compression Ratio 23.8:1
Firing Order 1-2-3
Fuel System Common rail direct injection
Fuel System Control Electronic
Lubricating system Forced lubrication by pump
Cooling system Forced circulation with water pump
Emission Level Tier 4 Final
Fuel Tank Capacity, gal (L) 11.0 (42.0)
Oil Capacity, qts (L) 7.1 (6.7)
Coolant Capacity, qts (L) 6.3 (6.0)
Electrical System Rating, Volts 12
Charging System Alternator
Alternator Rating, Amps 40

Power Take-Off
PTO Operational Type Live-continuous
PTO Horsepower, hp (kW) 30.6 (22.8)
PTO Clutch Dry disc
PTO Speed, rpm 540
PTO / Engine Speed, rpm 540/2580

Transmission Type Hydrostatic
Number of Forward Gears Infinite (3-range)
Number of Reverse Gears Infinite (3-range)
Oil Capacity, qts (L) 24.9 (23.5)
Maximum Forward Speed (Low), mph (kph) 3.9 (6.3)
Maximum Forward Speed (Medium), mph (kph) 6.8 (10.9)
Maximum Forward Speed (High), mph (kph) 14.1 (22.7)
Maximum Reverse Speed (Low), mph (kph) 3.5 (5.6)
Maximum Reverse Speed (Medium), mph (kph) 6.1 (9.9)
Maximum Reverse Speed (High), mph (kph) 12.7 (20.5)

Wheels and Tires
Drive Wheels 4WD 4x4
Steering Configuration Front Steer
Steering System Integral power steering
Brake Type Wet disc
Front Tire Size (AG) 7.2x16
Rear Tire Size (AG) 11.2x24
Front Tire Size (Industrial) 27x8.50-15
Rear Tire Size (Industrial) 15x19.5
Front Tread, in (mm) 43.1 (1095)
Rear Tread, in (mm) 43.8-50.8 (1115-1290)

Hydraulic System
Hydraulic System Type Open Center
Main Hydraulic Pump Type Gear
Implement Pump Flow, gpm (Lpm) 6.3 (23.9)
Steering Pump Flow, gpm (Lpm) 3.8 (14.5)
Hydraulic Pressure, Bar (psi) 162 (2350)
Number of Standard Remote Valves 1/3
3-Point Hitch Category Category 1
Draft Sensing or Lift Control Position Control
Rear Lift Capacity at 24" (0.6m) behind pin, lb (kg) 1435 (651)
Rear Lift Capacity at pin, lb (kg) 1998 (906)

Dimensions and Weight
Wheelbase, in (mm) 63.3 (1610)
Length, in (mm) 107.9 (2740)
Height (ROPS), in (mm) 91.7 (2330)
Height (Steering Wheel), in (mm) 58.1 (1475)
Overall Width, in (mm) 55.1 (1400)
Ground Clearance, in (mm) 13.4 (340)
Turning Radius, in (mm) 98.4 (2500)
Weight, lb (kg) 2780 (1260)



Farm Tractors Technical Specifications
JD 1026R JD 3650 JD 6400 JD 7810
FORD 1320 FORD 2810 FORD 3930 FORD 5600
MF 250 MF 690 MF 3060 MF 6180
NH TC48DA NH M100 NH T7550 NH 8560
CASE IH 495 CASE IH 1255XL CASE IH 2140 CASE IH 2294