The Kubota B2231 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 B2231 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 | D1105 |
| Engine horsepower | 22.7 hp (16.9 kW) |
Coolant Capacity Comparison Chart
Coolant capacity comparison
Engine horsepower comparison
Kubota B2231 Coolant and Engine Notes
| Coolant capacity note | The Kubota B2231’s key coolant figure here is 1.59 gal (6 L) for coolant capacity. Use that before buying coolant or draining the system |
|---|---|
| Radiator capacity note | For the Kubota B2231, the captured radiator capacity is 1.65 gal (6.2 L). If you are doing a full drain, check the full cooling-system capacity too |
| Coolant type note | Use the right coolant formula for the Kubota B2231: 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 | For the Kubota B2231, the captured mix is 50/50 coolant and water mix. Straight water is not the right long-term answer unless you are only flushing the system |
| Engine context note | Engine context for the Kubota B2231: engine model D1105 and engine horsepower 22.7 hp (16.9 kW). Engine size helps explain why coolant capacity changes between models |
| Refill note | Coolant changes are simple but easy to do sloppily. On the Kubota B2231, plan around 1.59 gal (6 L) and confirm the final level after air works out of the system |
Kubota B2231 Coolant Capacity FAQ
What is the cooling system capacity of the Kubota B2231?
The Kubota B2231 cooling system capacity is shown as 1.59 gal (6 L). That is the number to use before draining the system.
What coolant type should I use in the Kubota B2231?
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 B2231?
Not for normal long-term use. The Kubota B2231 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 B2231?
Yes. Old coolant can lose protection even if temperature looks normal. The listed service interval for the Kubota B2231 is the service interval in the operator manual.
Why does the Kubota B2231 coolant amount differ from other models?
Coolant capacity changes with engine and radiator setup. For the Kubota B2231, the supporting engine data is engine model D1105 and horsepower 22.7 hp (16.9 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.
