The Kubota KT20 coolant capacity is listed as 1.59 gal (6 L). It also lists coolant type ethylene glycol-based coolant and ASTM D3306 compatible and antifreeze mix 50/50 coolant and water mix.
Kubota KT20 Coolant Capacity
| Coolant capacity | 1.59 gal (6 L) |
|---|---|
| Cooling system capacity | 1.59 gal (6 L) |
| Radiator capacity | 1.59 gal (6 L) |
| Coolant type | ethylene glycol-based coolant and ASTM D3306 compatible |
| Antifreeze mix | 50/50 coolant and water mix |
| Engine model | D1403 |
| Engine horsepower | 19 hp (14.2 kW) |
| Engine displacement | 1.4 L (85.4 cu in) |
Coolant Capacity Comparison Chart
Coolant capacity comparison
Engine horsepower comparison
Engine displacement comparison
Kubota KT20 Coolant and Engine Notes
| Coolant capacity note | For service planning, the Kubota KT20 should be treated as 1.59 gal (6 L) coolant capacity. That is a compact tractor cooling system where a normal premixed coolant jug may cover most of the refill |
|---|---|
| Radiator capacity note | For the Kubota KT20, the captured radiator capacity is 1.59 gal (6 L). If you are doing a full drain, check the full cooling-system capacity too |
| Coolant type note | For the Kubota KT20, coolant type matters as much as capacity. The clean captured value is ethylene glycol-based coolant and ASTM D3306 compatible |
| Antifreeze mix note | For the Kubota KT20, 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 KT20: engine model D1403, engine horsepower 19 hp (14.2 kW), and displacement 1.4 L (85.4 cu in). Engine size helps explain why coolant capacity changes between models |
| Refill note | The practical service move for the Kubota KT20: buy enough coolant for 1.59 gal (6 L), fill to spec, run the engine, then recheck the radiator and overflow bottle after cooling |
Kubota KT20 Coolant Capacity FAQ
How much coolant does the Kubota KT20 take?
The main coolant amount captured for the Kubota KT20 is 1.59 gal (6 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 KT20?
Yes. Capacity tells you how much to buy; coolant type tells you what to buy. For the Kubota KT20, the captured coolant type is ethylene glycol-based coolant and ASTM D3306 compatible.
What antifreeze mix does the Kubota KT20 use?
The captured antifreeze mix for the Kubota KT20 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 KT20 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.
Why does the Kubota KT20 coolant amount differ from other models?
Coolant capacity changes with engine and radiator setup. For the Kubota KT20, the supporting engine data is engine model D1403, horsepower 19 hp (14.2 kW), and displacement 1.4 L (85.4 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.
