The Kubota GL418 coolant capacity is listed as 2.2 gal (8.3 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 GL418 Coolant Capacity
| Coolant capacity | 2.2 gal (8.3 L) |
|---|---|
| Cooling system capacity | 2.17 gal (8.2 L) |
| Radiator capacity | 2.2 gal (8.3 L) |
| Coolant type | ethylene glycol-based coolant, Kubota Genuine Coolant, and ASTM D3306 compatible |
| Antifreeze mix | 50/50 coolant and water mix |
| Engine horsepower | 41 hp (30.6 kW) |
Coolant Capacity Comparison Chart
Coolant capacity comparison
Engine horsepower comparison
Kubota GL418 Coolant and Engine Notes
| Coolant capacity note | The Kubota GL418 coolant spec points to 2.2 gal (8.3 L). Do not rely on the radiator-only amount if the full cooling-system capacity is available |
|---|---|
| Radiator capacity note | The Kubota GL418 radiator figure is 2.2 gal (8.3 L). Treat it as radiator context, not always the complete refill amount |
| Coolant type note | The captured coolant type for the Kubota GL418 is ethylene glycol-based coolant, Kubota Genuine Coolant, and ASTM D3306 compatible. Do not mix unknown coolant types unless the label and manual say they are compatible |
| Antifreeze mix note | The Kubota GL418 antifreeze mix is listed as 50/50 coolant and water mix. That is the normal protection range for freezing, boiling and corrosion control |
| Engine context note | For the Kubota GL418, the supporting engine specs are engine horsepower 41 hp (30.6 kW). Use them as context beside the coolant capacity, not as a replacement for the manual |
| Refill note | For a coolant change on the Kubota GL418, do not just dump in coolant and walk away. Fill slowly, run it up to temperature, cool it down and top up as needed |
Kubota GL418 Coolant Capacity FAQ
What is the cooling system capacity of the Kubota GL418?
The Kubota GL418 cooling system capacity is shown as 2.2 gal (8.3 L). That is the number to use before draining the system.
What coolant type should I use in the Kubota GL418?
Use ethylene glycol-based coolant, Kubota Genuine Coolant, and ASTM D3306 compatible. The blunt rule is simple: match the manual’s coolant spec and do not mix unknown coolant formulas.
Should I use straight water in the Kubota GL418?
Not for normal long-term use. The Kubota GL418 should use 50/50 coolant and water mix or the manual’s specified coolant mix so the system gets corrosion, freeze and boil protection.
Does old coolant matter in the Kubota GL418?
Yes. Old coolant can lose protection even if temperature looks normal. The listed service interval for the Kubota GL418 is the service interval in the operator manual.
Why does the Kubota GL418 coolant amount differ from other models?
Coolant capacity changes with engine and radiator setup. For the Kubota GL418, the supporting engine data is horsepower 41 hp (30.6 kW).
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.
