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Kubota L3901 Maintenance

The Kubota L3901 is a compact utility tractor from Standard L series. This model was manufactured between 2014 and 2021. The tractor was designed in 2 versions: L3901F (2-wheel drive) or L3901DT (4-wheel drive).

The Kubota L3901 powerline system components: a 111.4 cu.in (1.8L) Kubota D1803-CR-E4 3-cylinder direct injection liquid-cooled diesel engine with a rated power of 37.5 hp (28.1 kW), and synchronized shuttle transmission with 8 forward and 8 reverse gears. The maximum travel speed (forward/reverse): 13.2 mph (21.2 km/h) and 13.1 mph (21.1 km/h).

The open center hydraulic system includes a gear pump with a flow rate of 6.3 gal/min (23.9 l/min). The hydraulic pressure is 162 bar (2350 psi). The 2WD models are equipped with 5.00x15 front tires and 11.2x24 rear tires. The 7.2x16 or 27x8.50-15 front tires and 11.2x24 or 15x19.5 rear tires are used for 4WD tractors. The wheelbase is 63.3 inches (1610 mm). Compatible attachments for the tractor: 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 inches (2280 mm).

Refill Capacities
Engine oil capacity, gal (L) 1.75 (6.7)
Engine coolant capacity, gal (L) 1.6 (6.0)
Hydraulic/transmission fluid capacity (2WD), gal (L) 7.4 (28.0)
Hydraulic/transmission fluid capacity (4WD), gal (L) 7.5 (28.5)
Front axle oil capacity, gal (L) 1.2 (4.5)

Recommended Oil and Fluid
Engine oil type SAE 20, SAE 30, 10W-30, 15W-40. API Service category CI-4, CJ-4
Engine coolant type Kubota Antifreeze/Coolant
Hydraulic/transmission fluid type Kubota Super UDT-2 Fluid
Front axle oil type Kubota Super UDT-2, SAE 80, SAE 80W-90 Gear Oil

Service Intervals
Check hydraulic/transmission fluid level Every 50 hours
Check front axle oil level Every 50 hours
Lubricate axle hub bearings Every 50 hours
Clean engine air filter element Every 100 hours
Check battery and clean terminals Every 100 hours
Inspect and adjust fan belt Every 100 hours
Adjust parking and service brakes Every 100 hours
Check and adjust engine idling Every 200 hours
Change engine oil Every 400 hours
Replace engine oil filter Every 400 hours
Replace hydraulic oil filter Every 400 hours
Replace engine fuel filter Every 400 hours
Clean water separator Every 400 hours
Change hydraulic/transmission fluid Every 400 hours
Change front axle oil Every 400 hours
Check power steering oil line Every 800 hours
Check and adjust valve clearance Every 800 hours
Replace engine air filter element Every 1000 hours
Clean fuel injection nozzles Every 1500 hours
Clean EGR cooler Every 1500 hours
Flush cooling system and add new coolant Every 2000 hours

Replacement Parts
Engine oil filter part number HH164-32430
Engine fuel filter part number 1J800-43172 (Spin On), 1G311-43380 (Element)
Engine air filter part number TA040-93230 or TC620-93230
Hydraulic oil filter part number HH3A0-82623 or TC422-82620
Drive belt part number 15469-97010



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CASE IH 495 CASE IH 1255XL CASE IH 2140 CASE IH 2294