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Kubota L305 Maintenance

The Kubota L305 is a compact utility tractor from L-series. This model was manufactured between 1979 and 1985. The Kubota L305 tractor is equipped with Kubota D1301-A vertical 4-cycle 3-cylinder diesel engine.

A 79.3 cubic inches (1.3 L) engine has a cylinder bore of 3.23" (82 mm), piston stroke of 3.23" (82 mm), and rated power of 30 hp (22.5 kW). The mechanical transmission includes a dry single-plate clutch and sliding mesh gearbox with 8 forward and 2 revers gears. Max. forward speed - 12.7 mph (20.4 kph), maximum reverse speed - 6.2 mph (10.1 kph).

The open center hydraulic system includes a gear pump with a flow rate of 6.4 gpm (24.2 lpm). The hydraulic pressure is 155 bar (2250 psi). The L305F tractors (2WD) are equipped with 7.00x16 front tires and 12.4x24 rear tires. The 8.3x16 front tires and 13.6x24 rear tires are used for L305DT tractors (4WD). The wheel base is 72.8" (1840 mm). The Kubota L305 is compatible with Kubota L1720 front end loader with lift capacity to full height of 1495 lbs (680 kg).

Refill Capacities
Engine oil capacity, gal (L) 1.7 (6.3)
Engine coolant capacity, gal (L) 1.5 (5.8)
Hydraulic/transmission fluid capacity (2WD), gal (L) 7.9 (30.0)
Hydraulic/transmission fluid capacity (4WD), gal (L) 8.2 (31.0)
Front axle oil capacity, gal (L) 1.5 (5.7)

Recommended Oil and Fluid
Engine oil type SAE 20, SAE 30, SAE 10W, 10W-30. API Service category CC, CD
Engine coolant type Kubota Antifreeze/Coolant
Hydraulic/transmission fluid type Kubota UDT or Kubota Super UDT Fluid
Front axle oil type 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
Change engine oil Every 75 hours
Clean engine air filter element Every 100 hours
Clean engine fuel filter Every 100 hours
Check battery and clean terminals Every 100 hours
Replace engine oil filter Every 150 hours
Check steering oil level Every 150 hours
Inspect and adjust fan belt Every 200 hours
Adjust parking and service brakes Every 200 hours
Replace hydraulic/transmission oil filter Every 300 hours
Change hydraulic/transmission fluid Every 300 hours
Change front axle oil Every 300 hours
Check and adjust engine idling Every 300 hours
Change engine fuel filter element Every 400 hours
Clean radiator fins Every 400 hours
Replace engine air filter element Every 600 hours
Check and adjust valve clearance Every 600 hours
Flush cooling system and add new coolant Every 1000 hours

Replacement Parts
Engine oil filter part number 15213-32090
Engine fuel filter part number 15291-43010, 15221-43080 (Element)
Engine air filter part number 15401-11080, 15287-11080, 15287-11490 (Element)
Hydraulic/transmission oil filter part number 37300-37710
Hydraulic/transmission filter gasket part number 04811-50600
Drive belt part number 15401-97010



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