The Kubota L3970 coolant capacity is listed as 2.17 gal (8.2 L). It also lists coolant type ethylene glycol-based coolant, Kubota Genuine Coolant, and long-life coolant and antifreeze mix 50/50 coolant and water mix.
Coolant capacity2.17 gal (8.2 L)
Coolant typeethylene glycol-based coolant, Kubota Genuine Coolant, and long-life coolant
Antifreeze mix50/50 coolant and water mix
Change intervalevery 700 hours
Kubota L3970 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, Kubota Genuine Coolant, and long-life coolant
Antifreeze mix
50/50 coolant and water mix
Coolant change interval
every 700 hours
Engine model
D1803
Engine horsepower
39 hp (29.1 kW)
Engine displacement
1.8 L (111.4 cu in)
Coolant Capacity Comparison Chart
Coolant capacity comparison
This model
2.17 gal
Average
2 gal
Low
1 gal
High
4 gal
Engine horsepower comparison
This model
39 hp
Average
35 hp
Low
20 hp
High
60 hp
Engine displacement comparison
This model
1.8 L
Average
1.7 L
Low
0.9 L
High
3 L
Kubota L3970 Coolant and Engine Notes
Coolant capacity note
For service planning, the Kubota L3970 should be treated as 2.17 gal (8.2 L) coolant capacity. That is a compact tractor cooling system where a normal premixed coolant jug may cover most of the refill
Radiator capacity note
For the Kubota L3970, the captured radiator capacity is 2.17 gal (8.2 L). If you are doing a full drain, check the full cooling-system capacity too
Coolant type note
Coolant type for the Kubota L3970 is listed as ethylene glycol-based coolant, Kubota Genuine Coolant, and long-life coolant. The safest move is to use coolant that matches the manual’s spec rather than mixing random formulas
Antifreeze mix note
For the Kubota L3970, 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 L3970 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 L3970: engine model D1803, engine horsepower 39 hp (29.1 kW), and displacement 1.8 L (111.4 cu in). Engine size helps explain why coolant capacity changes between models
Refill note
When refilling the Kubota L3970, 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 L3970 Coolant Capacity FAQ
What is the cooling system capacity of the Kubota L3970?
The Kubota L3970 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 L3970?
Use ethylene glycol-based coolant, Kubota Genuine Coolant, and long-life 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 L3970?
Not for normal long-term use. The Kubota L3970 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 L3970?
Yes. Old coolant can lose protection even if temperature looks normal. The listed service interval for the Kubota L3970 is every 700 hours.
Why does the Kubota L3970 coolant amount differ from other models?
Coolant capacity changes with engine and radiator setup. For the Kubota L3970, the supporting engine data is engine model D1803, horsepower 39 hp (29.1 kW), and displacement 1.8 L (111.4 cu in).
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.
