The Kubota GL338 coolant capacity is listed as 1.73 gal (6.5 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 GL338 Coolant Capacity
| Coolant capacity | 1.65 gal (6.2 L) |
|---|---|
| Cooling system capacity | 1.73 gal (6.5 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 | D1803 |
| Engine horsepower | 32.6 hp (24.3 kW) |
Coolant Capacity Comparison Chart
Coolant capacity comparison
Engine horsepower comparison
Kubota GL338 Coolant and Engine Notes
| Coolant capacity note | For the Kubota GL338, 1.73 gal (6.5 L) is the main coolant capacity captured. Use it as a refill planning number, then confirm the final level at the machine |
|---|---|
| Radiator capacity note | For the Kubota GL338, 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 | For the Kubota GL338, coolant type matters as much as capacity. The clean captured value is ethylene glycol-based coolant, Kubota Genuine Coolant, and ASTM D3306 compatible |
| Antifreeze mix note | For the Kubota GL338, 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 GL338: engine model D1803 and engine horsepower 32.6 hp (24.3 kW). Engine size helps explain why coolant capacity changes between models |
| Refill note | The practical service move for the Kubota GL338: buy enough coolant for 1.73 gal (6.5 L), fill to spec, run the engine, then recheck the radiator and overflow bottle after cooling |
Kubota GL338 Coolant Capacity FAQ
How much coolant does the Kubota GL338 take?
The main coolant amount captured for the Kubota GL338 is 1.73 gal (6.5 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 GL338?
Yes. Capacity tells you how much to buy; coolant type tells you what to buy. For the Kubota GL338, the captured coolant type is ethylene glycol-based coolant, Kubota Genuine Coolant, and ASTM D3306 compatible.
What antifreeze mix does the Kubota GL338 use?
The captured antifreeze mix for the Kubota GL338 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 GL338 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 GL338 coolant amount differ from other models?
Coolant capacity changes with engine and radiator setup. For the Kubota GL338, the supporting engine data is engine model D1803 and horsepower 32.6 hp (24.3 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.
