The Kubota L3940 coolant capacity is listed as 8.66 gal (32.8 L). It also lists coolant type ethylene glycol-based coolant and ASTM D3306 compatible and antifreeze mix 50/50 coolant and water mix.
Coolant capacity8.66 gal (32.8 L)
Coolant typeethylene glycol-based coolant and ASTM D3306 compatible
Antifreeze mix50/50 coolant and water mix
Kubota L3940 Coolant Capacity
Coolant capacity
8.66 gal (32.8 L)
Coolant type
ethylene glycol-based coolant and ASTM D3306 compatible
Antifreeze mix
50/50 coolant and water mix
Engine horsepower
40.5 hp (30.2 kW)
Engine displacement
2 L (122 cu in)
Coolant Capacity Comparison Chart
Coolant capacity comparison
This model
8.66 gal
Average
8 gal
Low
4 gal
High
16 gal
Engine horsepower comparison
This model
40 hp
Average
35 hp
Low
20 hp
High
60 hp
Engine displacement comparison
This model
2 L
Average
1.7 L
Low
0.9 L
High
3 L
Kubota L3940 Coolant and Engine Notes
Coolant capacity note
The Kubota L3940 coolant spec points to 8.66 gal (32.8 L). Do not rely on the radiator-only amount if the full cooling-system capacity is available
Coolant type note
The captured coolant type for the Kubota L3940 is ethylene glycol-based coolant and ASTM D3306 compatible. Do not mix unknown coolant types unless the label and manual say they are compatible
Antifreeze mix note
For the Kubota L3940, 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 L3940: engine horsepower 40.5 hp (30.2 kW) and displacement 2 L (122 cu in). Engine size helps explain why coolant capacity changes between models
Refill note
For a coolant change on the Kubota L3940, 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 L3940 Coolant Capacity FAQ
What is the cooling system capacity of the Kubota L3940?
The Kubota L3940 cooling system capacity is shown as 8.66 gal (32.8 L). That is the number to use before draining the system.
What coolant type should I use in the Kubota L3940?
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 L3940?
Not for normal long-term use. The Kubota L3940 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 L3940?
Yes. Old coolant can lose protection even if temperature looks normal. The listed service interval for the Kubota L3940 is the service interval in the operator manual.
What engine specs affect Kubota L3940 coolant capacity?
The captured engine context is horsepower 40.5 hp (30.2 kW) and displacement 2 L (122 cu in). Engine size is one reason coolant capacity changes between tractors.
Official information note
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.
