The Kubota GL300 coolant capacity is listed as 1.59 gal (6 L). It also lists coolant type ethylene glycol-based coolant, Kubota Genuine Coolant, and ASTM D3306 compatible and antifreeze mix 50/50 coolant and water mix.
Kubota GL300 Coolant Capacity
| Coolant capacity | 1.59 gal (6 L) |
|---|---|
| Cooling system capacity | 1.59 gal (6 L) |
| Radiator capacity | 1.65 gal (6.2 L) |
| Coolant type | ethylene glycol-based coolant, Kubota Genuine Coolant, and ASTM D3306 compatible |
| Antifreeze mix | 50/50 coolant and water mix |
| Engine model | D1503 |
| Engine horsepower | 30 hp (22.4 kW) |
| Engine displacement | 1.5 L (91.5 cu in) |
Coolant Capacity Comparison Chart
Coolant capacity comparison
Engine horsepower comparison
Engine displacement comparison
Kubota GL300 Coolant and Engine Notes
| Coolant capacity note | The Kubota GL300 coolant spec points to 1.59 gal (6 L). Do not rely on the radiator-only amount if the full cooling-system capacity is available |
|---|---|
| Radiator capacity note | Radiator capacity is listed as 1.65 gal (6.2 L). The full cooling system can be higher because coolant also sits in the engine and hoses |
| Coolant type note | Use the right coolant formula for the Kubota GL300: ethylene glycol-based coolant, Kubota Genuine Coolant, and ASTM D3306 compatible. Cheap wrong coolant is not a smart saving if it causes corrosion or deposits |
| Antifreeze mix note | The 50/50 coolant and water mix mix gives the Kubota GL300 coolant system a sensible balance of freeze protection, boil protection and corrosion protection |
| Engine context note | The Kubota GL300 engine data captured here is engine model D1503, engine horsepower 30 hp (22.4 kW), and displacement 1.5 L (91.5 cu in). Bigger engines usually need more coolant and more careful refill bleeding |
| Refill note | Coolant changes are simple but easy to do sloppily. On the Kubota GL300, plan around 1.59 gal (6 L) and confirm the final level after air works out of the system |
Kubota GL300 Coolant Capacity FAQ
What is the Kubota GL300 coolant capacity?
The Kubota GL300 coolant capacity is listed as 1.59 gal (6 L) for coolant capacity. Use this as the refill planning number and confirm the final level at the radiator or overflow bottle.
Can I use any coolant in the Kubota GL300?
No. Use ethylene glycol-based coolant, Kubota Genuine Coolant, and ASTM D3306 compatible or a coolant that clearly matches the manual’s required spec. Wrong coolant can create corrosion, deposits or seal problems.
Is premixed coolant okay for the Kubota GL300?
Premixed coolant can be fine if it matches ethylene glycol-based coolant, Kubota Genuine Coolant, and ASTM D3306 compatible and the required mix. The captured mix for the Kubota GL300 is 50/50 coolant and water mix.
How often should I change coolant in the Kubota GL300?
The captured coolant change interval for the Kubota GL300 is the service interval in the operator manual. If service history is unknown, changing it is usually smarter than guessing.
Why does the Kubota GL300 coolant amount differ from other models?
Coolant capacity changes with engine and radiator setup. For the Kubota GL300, the supporting engine data is engine model D1503, horsepower 30 hp (22.4 kW), and displacement 1.5 L (91.5 cu in).
Mistakes do happen. Tractor coolant specs can change by year, market, engine, radiator, cab/heater setup and service procedure. Please check the operator manual, decal information and official kubotausa.com website for official information before draining or refilling the cooling system.
