Home / Farm Tractors / Kubota Tractors / Kubota L4630

Kubota L4630 Maintenance

The Kubota L4630 L30 series compact utility tractor was manufactured between 2003 and 2007. This model was designed in 4 versions: L4630DT (8-Speed), L4630GST (12-Speed), L4630HST (Hydrostatic), and L4630GSTC (Cab).

The Kubota L4630 tractor is powered by 134.1 cu.in (2.2L) Kubota V2203 4-cycle vertical 4-cylinder indirect injection naturally aspirated diesel engine with a rated power of 44.7 Hp (33.3 kW) and 146.2 Nm (107.8 lb-ft) of maximum torque at 1600 rpm.

The Kubota L4630 is fitted with three transmission options: FST Sync Shuttle fully synchronized transmission with 8 forward and 8 reverse gears, Glide Shift fully synchronized transmission with 12 forward and 8 reverse gears, and 3-range hydrostatic transmission with infinite forward and reverse gears. The maximum travel speed (forward/reverse): 18.7 mph (30 km/h) and 16.8 mph (27 km/h). The open center hydraulic system used a gear pump with a rated capacity of 9.8 gal/min (37 l/min).

The hydraulic system pressure is 177 bar (2560 psi). The Kubota L4630 is equipped with a hydrostatic power steering, wet disc brakes, 8.00x16 or 8.3x16 front tires, and 13.6x24 or 14.9x24 rear tires. The wheel base is 74.6" (1895 mm). The tractor is compatible with a Kubota LA853 front-end loader with lift capacity to full height of 2374 lbs (1076 kg) and breakout force of 3125 lbs (1417 kg).

Refill Capacities
Engine oil capacity, gal (L) 2.1 (8.2)
Engine coolant capacity (ROPS), gal (L) 2.0 (7.5)
Engine coolant capacity (Cab), gal (L) 2.3 (8.7)
Hydraulic/transmission fluid capacity, gal (L) 11.4 (43.0)
Front axle oil capacity, gal (L) 1.7 (6.5)

Recommended Oil and Fluid
Engine oil type SAE 20, SAE 30, SAE 10W, 10W-30, 10W-40. API Service category CD, CE, CF
Engine coolant type Kubota Antifreeze/Coolant
Hydraulic/transmission fluid type Kubota UDT or Kubota Super UDT
Front axle oil type Kubota UDT, 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 elements Every 100 hours
Service engine fuel 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
Change engine oil Every 100 hours
Replace engine oil filter Every 200 hours
Replace hydraulic oil filter Every 200 hours
Replace hydrostatic transmission oil filter Every 200 hours
Clean cab air filters Every 200 hours
Check power steering oil line Every 200 hours
Check and adjust engine idling Every 200 hours
Clean radiator fins Every 300 hours
Change hydraulic/transmission fluid Every 400 hours
Change front axle oil Every 400 hours
Replace engine fuel filter Every 400 hours
Replace primary engine air filter element Every 600 hours
Replace secondary engine air filter element Every 600 hours
Check and adjust valve clearance Every 800 hours
Flush cooling system and add new coolant Every 1000 hours

Replacement Parts
Engine oil filter part number HH164-32430
Engine fuel filter part number 15521-43160, 1A001-43160 (Element)
Primary engine air filter part number TA040-93230
Secondary engine air filter part number TA040-93220 (Element)
Hydraulic oil filter part number HHTA0-37710
HST transmission oil filter part number HHTA0-59900
Cab air filter part number T0270-72070, TA043-71600
Drive belt part number 15469-97010



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