The Kubota STW37 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 Kubota recommends using a 50: 50 ethylene glycol-based coolant-to-water mix for the STW37 tractor.
Kubota STW37 Coolant Capacity
| 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 | Kubota recommends using a 50: 50 ethylene glycol-based coolant-to-water mix for the STW37 tractor |
| Engine horsepower | 36.6 hp (27.3 kW) |
| Engine displacement | 1.8 L (109.8 cu in) |
Coolant Capacity Comparison Chart
Coolant capacity comparison
Engine horsepower comparison
Engine displacement comparison
Kubota STW37 Coolant and Engine Notes
| Coolant capacity note | For the Kubota STW37, 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 |
|---|---|
| Radiator capacity note | Radiator capacity is listed as 2.17 gal (8.2 L). The full cooling system can be higher because coolant also sits in the engine and hoses |
| Coolant type note | The captured coolant type for the Kubota STW37 is ethylene glycol-based coolant and Kubota Genuine Coolant. Do not mix unknown coolant types unless the label and manual say they are compatible |
| Antifreeze mix note | The Kubota recommends using a 50: 50 ethylene glycol-based coolant-to-water mix for the STW37 tractor mix gives the Kubota STW37 coolant system a sensible balance of freeze protection, boil protection and corrosion protection |
| Engine context note | The Kubota STW37 engine data captured here is engine horsepower 36.6 hp (27.3 kW) and displacement 1.8 L (109.8 cu in). Bigger engines usually need more coolant and more careful refill bleeding |
| Refill note | For a coolant change on the Kubota STW37, do not just dump in coolant and walk away. Fill slowly, run it up to temperature, cool it down and top up as needed |
Kubota STW37 Coolant Capacity FAQ
What is the cooling system capacity of the Kubota STW37?
The Kubota STW37 cooling system capacity is shown as 2.17 gal (8.2 L). That is the number to use before draining the system.
What coolant type should I use in the Kubota STW37?
Use ethylene glycol-based coolant and Kubota Genuine Coolant. 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 STW37?
Not for normal long-term use. The Kubota STW37 should use Kubota recommends using a 50: 50 ethylene glycol-based coolant-to-water mix for the STW37 tractor or the manual’s specified coolant mix so the system gets corrosion, freeze and boil protection.
Does old coolant matter in the Kubota STW37?
Yes. Old coolant can lose protection even if temperature looks normal. The listed service interval for the Kubota STW37 is the service interval in the operator manual.
Why does the Kubota STW37 coolant amount differ from other models?
Coolant capacity changes with engine and radiator setup. For the Kubota STW37, the supporting engine data is horsepower 36.6 hp (27.3 kW) and displacement 1.8 L (109.8 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.
