The Kubota KL21 coolant capacity is listed as 2.17 gal (8.2 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 KL21 Coolant Capacity
| Coolant capacity | 2.17 gal (8.2 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 | 21.5 hp (16 kW) |
Coolant Capacity Comparison Chart
Coolant capacity comparison
Engine horsepower comparison
Kubota KL21 Coolant and Engine Notes
| Coolant capacity note | For the Kubota KL21, 2.17 gal (8.2 L) is the main coolant capacity captured. Use it as a refill planning number, then confirm the final level at the machine |
|---|---|
| Coolant type note | Use the right coolant formula for the Kubota KL21: 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 Kubota KL21 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 KL21, the supporting engine specs are engine model D1105 and engine horsepower 21.5 hp (16 kW). Use them as context beside the coolant capacity, not as a replacement for the manual |
| Refill note | Coolant changes are simple but easy to do sloppily. On the Kubota KL21, plan around 2.17 gal (8.2 L) and confirm the final level after air works out of the system |
Kubota KL21 Coolant Capacity FAQ
How much coolant does the Kubota KL21 take?
The main coolant amount captured for the Kubota KL21 is 2.17 gal (8.2 L). Buy a little extra so you can top up after the engine warms up and cools down.
Does coolant type matter on the Kubota KL21?
Yes. Capacity tells you how much to buy; coolant type tells you what to buy. For the Kubota KL21, the captured coolant type is ethylene glycol-based coolant, Kubota Genuine Coolant, and ASTM D3306 compatible.
What antifreeze mix does the Kubota KL21 use?
The captured antifreeze mix for the Kubota KL21 is 50/50 coolant and water mix. A 50/50-style mix is the common practical answer unless your manual or climate calls for something different.
When should the Kubota KL21 coolant be replaced?
Use the service interval in the operator manual as the service guide. Coolant can look okay but still lose corrosion protection over time.
What engine specs affect Kubota KL21 coolant capacity?
The captured engine context is engine model D1105 and horsepower 21.5 hp (16 kW). Engine size is one reason coolant capacity changes between tractors.
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.
