The Kubota M126GX coolant capacity is listed as 4 gal (15 L). It also lists coolant type ethylene glycol-based coolant and ASTM D3306 compatible.
Coolant capacity4 gal (15 L)
Coolant typeethylene glycol-based coolant and ASTM D3306 compatible
Change intervalevery 2,000 hours
Kubota M126GX Coolant Capacity
Coolant capacity
4 gal (15 L)
Radiator capacity
4 gal (15 L)
Coolant type
ethylene glycol-based coolant and ASTM D3306 compatible
Coolant change interval
every 2,000 hours
Engine model
V6108-TI-CRS
Engine horsepower
125 hp (93.2 kW)
Engine displacement
6.1 L (374 cu in)
Coolant Capacity Comparison Chart
Coolant capacity comparison
This model
4 gal
Average
4 gal
Low
2 gal
High
8 gal
Engine horsepower comparison
This model
125 hp
Average
140 hp
Low
80 hp
High
240 hp
Engine displacement comparison
This model
6.1 L
Average
6 L
Low
3 L
High
10 L
Kubota M126GX Coolant and Engine Notes
Coolant capacity note
The Kubota M126GX coolant spec points to 4 gal (15 L). Do not rely on the radiator-only amount if the full cooling-system capacity is available
Radiator capacity note
For the Kubota M126GX, the captured radiator capacity is 4 gal (15 L). If you are doing a full drain, check the full cooling-system capacity too
Coolant type note
For the Kubota M126GX, coolant type matters as much as capacity. The clean captured value is ethylene glycol-based coolant and ASTM D3306 compatible
Coolant change interval note
Coolant service for the Kubota M126GX is listed as every 2,000 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 M126GX: engine model V6108-TI-CRS, engine horsepower 125 hp (93.2 kW), and displacement 6.1 L (374 cu in). Engine size helps explain why coolant capacity changes between models
Refill note
The practical service move for the Kubota M126GX: buy enough coolant for 4 gal (15 L), fill to spec, run the engine, then recheck the radiator and overflow bottle after cooling
Kubota M126GX Coolant Capacity FAQ
What is the cooling system capacity of the Kubota M126GX?
The Kubota M126GX cooling system capacity is shown as 4 gal (15 L). That is the number to use before draining the system.
What coolant type should I use in the Kubota M126GX?
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 M126GX?
Not for normal long-term use. The Kubota M126GX should use the coolant mix specified in the manual or the manual’s specified coolant mix so the system gets corrosion, freeze and boil protection.
Does old coolant matter in the Kubota M126GX?
Yes. Old coolant can lose protection even if temperature looks normal. The listed service interval for the Kubota M126GX is every 2,000 hours.
What engine specs affect Kubota M126GX coolant capacity?
The captured engine context is engine model V6108-TI-CRS, horsepower 125 hp (93.2 kW), and displacement 6.1 L (374 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.
