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Kubota L3901HST Maintenance
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 oil capacity, gal (L) |
1.75 (6.7) |
| Engine coolant capacity, gal (L) |
1.6 (6.0) |
| Hydraulic/transmission fluid capacity, gal (L) |
6.2 (23.5) |
| 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 |
| 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 |
| Replace hydrostatic transmission oil filter |
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 |
| 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 |
| HST transmission oil filter part number |
HHK70-14073 |
| Drive belt part number |
15469-97010 |
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| Farm Tractors Technical Specifications |
