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Home / Lawn and Garden Tractors / Kubota Lawn Tractors / Kubota G23

Kubota G23 Maintenance

The Kubota G23 is a 4-wheel drive diesel lawn tractor. This model was manufactured between 2009 and 2015. The components of Kubota G23 driveline system: Kubota D902 4-cycle vertical 3-cylinder naturally aspirated water-cooled diesel engine and hydrostatic transmission with infinite forward and reverse gears.

A 54.8 cubic inches (0.9L) engine has a cylinder bore of 2.83" (72 mm), piston stroke of 2.90" (73.6 mm), and rated power of 23.5 hp (17.5 kW). Max forward speed - 9.7 mph (15.5 km/h), max reverse speed - 5 mph (8 km/h).

The Kubota G23 is equipped with a hydrostatic power steering, wet disc brakes, 16x7.50-8 front tires, and 24x12.00-12 rear tires. The wheel base is 54.9" (1390 mm). The tractor is compatible with a 48" mid-mount 2-blade rear discharge Kubota RCK48 mower deck with cutting height of 1.0-4.0" (25-102 mm), dial cutting height adjustment, and hydraulic lift system.

Refill Capacities
Engine oil capacity, qts (L) 3.3 (3.1)
Engine coolant capacity, qts (L) 3.4 (3.2)
Transmission fluid capacity, qts (L) 11.7 (11.0)
Mower gear box capacity, qts (L) 2.0 (1.9)
Fuel tank capacity, gal (L) 5.3 (20.0)

Recommended Oil and Fluid
Engine oil type SAE 30, SAE 10W, 10W-30, 15W-40. API Service category CF or higher
Engine coolant type Kubota Antifreeze/Coolant
Transmission fluid type Kubota UDT or Kubota Super UDT Fluid
Mower gear box oil type Kubota UDT or Kubota Super UDT Fluid

Service Intervals
Check transmission fluid level Every 50 hours
Check mower gear box oil level Every 50 hours
Lubricate axle hub bearings Every 50 hours
Clean engine air filter element Every 50 hours
Check battery and clean terminals Every 50 hours
Adjust front PTO belt tension Every 50 hours
Check engine fuel filter element Every 100 hours
Inspect and adjust fan belt Every 100 hours
Check and adjust brakes Every 100 hours
Change mower gear box oil Every 150 hours
Change engine oil Every 200 hours
Replace engine oil filter Every 200 hours
Replace transmission oil filter Every 200 hours
Check and adjust toe-in Every 200 hours
Check and adjust engine idling Every 300 hours
Clean radiator fins Every 300 hours
Clean transmission strainer Every 400 hours
Replace engine fuel filter Every 400 hours
Change transmission fluid Every 400 hours
Replace 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 HH150-32430
Engine fuel filter part number 12581-43012 (Element)
Engine air filter part number K1211-82320 (Element)
Hydraulic suction filter part number K2063-36520
Hydrostatic transmission filter part number HHK70-14070
Front PTO belt part number K2053-15643

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