The Kubota F3990 coolant capacity is listed as 2.17 gal (8.2 L). It also lists coolant type ethylene glycol-based coolant and Kubota Genuine Coolant and antifreeze mix 50/50 coolant and water mix.
Kubota F3990 Coolant Capacity
| Coolant capacity | 2.17 gal (8.2 L) |
|---|---|
| Cooling system capacity | 2.17 gal (8.2 L) |
| Radiator capacity | 2.17 gal (8.2 L) |
| Coolant type | ethylene glycol-based coolant and Kubota Genuine Coolant |
| Antifreeze mix | 50/50 coolant and water mix |
| Engine horsepower | 39 hp (29.1 kW) |
| Engine displacement | 1.5 L (91.5 cu in) |
Coolant Capacity Comparison Chart
Coolant capacity comparison
Engine horsepower comparison
Engine displacement comparison
Kubota F3990 Coolant and Engine Notes
| Coolant capacity note | The headline cooling-system number for the Kubota F3990 is 2.17 gal (8.2 L). Buy enough coolant before opening the drain plug |
|---|---|
| Radiator capacity note | The Kubota F3990 radiator figure is 2.17 gal (8.2 L). Treat it as radiator context, not always the complete refill amount |
| Coolant type note | Coolant type for the Kubota F3990 is listed as ethylene glycol-based coolant and Kubota Genuine Coolant. The safest move is to use coolant that matches the manual’s spec rather than mixing random formulas |
| Antifreeze mix note | The Kubota F3990 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 F3990, the supporting engine specs are engine horsepower 39 hp (29.1 kW) and displacement 1.5 L (91.5 cu in). Use them as context beside the coolant capacity, not as a replacement for the manual |
| Refill note | When refilling the Kubota F3990, use 2.17 gal (8.2 L) as the planning number and 50/50 coolant and water mix as the mixture guide. Recheck the level after the thermostat opens |
Kubota F3990 Coolant Capacity FAQ
How much coolant does the Kubota F3990 take?
The main coolant amount captured for the Kubota F3990 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 F3990?
Yes. Capacity tells you how much to buy; coolant type tells you what to buy. For the Kubota F3990, the captured coolant type is ethylene glycol-based coolant and Kubota Genuine Coolant.
What antifreeze mix does the Kubota F3990 use?
The captured antifreeze mix for the Kubota F3990 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 F3990 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 F3990 coolant capacity?
The captured engine context is horsepower 39 hp (29.1 kW) and displacement 1.5 L (91.5 cu in). 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.
