The Kubota L3700SU coolant capacity is listed as 6.6 gal (25 L). It also lists coolant type ethylene glycol-based coolant and ASTM D3306 compatible and antifreeze mix 50/50 coolant and water mix.
Kubota L3700SU Coolant Capacity
| Coolant capacity | 6.6 gal (25 L) |
|---|---|
| Cooling system capacity | 6.21 gal (23.5 L) |
| Coolant type | ethylene glycol-based coolant and ASTM D3306 compatible |
| Antifreeze mix | 50/50 coolant and water mix |
| Coolant change interval | every 700 hours |
| Engine displacement | 1.8 L (111.4 cu in) |
Coolant Capacity Comparison Chart
Coolant capacity comparison
Engine displacement comparison
Kubota L3700SU Coolant and Engine Notes
| Coolant capacity note | The Kubota L3700SU’s key coolant figure here is 6.6 gal (25 L) for coolant capacity. Use that before buying coolant or draining the system |
|---|---|
| Coolant type note | Use the right coolant formula for the Kubota L3700SU: ethylene glycol-based coolant and ASTM D3306 compatible. Cheap wrong coolant is not a smart saving if it causes corrosion or deposits |
| Antifreeze mix note | For the Kubota L3700SU, 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 |
| Coolant change interval note | Coolant service for the Kubota L3700SU is listed as every 700 hours. If the service history is unknown, a fresh drain and refill is usually the cleaner move |
| Engine context note | Engine context for the Kubota L3700SU: displacement 1.8 L (111.4 cu in). Engine size helps explain why coolant capacity changes between models |
| Refill note | Coolant changes are simple but easy to do sloppily. On the Kubota L3700SU, plan around 6.6 gal (25 L) and confirm the final level after air works out of the system |
Kubota L3700SU Coolant Capacity FAQ
What is the cooling system capacity of the Kubota L3700SU?
The Kubota L3700SU cooling system capacity is shown as 6.6 gal (25 L). That is the number to use before draining the system.
What coolant type should I use in the Kubota L3700SU?
Use ethylene glycol-based coolant and ASTM D3306 compatible. 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 L3700SU?
Not for normal long-term use. The Kubota L3700SU should use 50/50 coolant and water mix or the manual’s specified coolant mix so the system gets corrosion, freeze and boil protection.
Does old coolant matter in the Kubota L3700SU?
Yes. Old coolant can lose protection even if temperature looks normal. The listed service interval for the Kubota L3700SU is every 700 hours.
What engine specs affect Kubota L3700SU coolant capacity?
The captured engine context is displacement 1.8 L (111.4 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.
