The listed coolant capacity for the John Deere X390 is 1.59 gal (6 L). Keep a little extra coolant available for final top-up after air leaves the system.
Coolant capacity1.59 gal (6 L)Cooling system refill amount
John Deere X390 Coolant Capacity Specs
Coolant capacity
1.59 gal (6 L)
Engine model
Kawasaki FR691V
Engine horsepower
22 hp
Engine displacement
44.3 cu in (0.73 L)
John Deere X390 Coolant Capacity Guide
Coolant capacity guide
This model
1.59 gal
Class low
0.5 gal
Class typical
2.5 gal
Class high
4.5 gal
Compared with a broad ztrak / mower guide, not the full tractor dataset.
John Deere X390 Coolant Service Notes
Coolant capacity note
The main coolant number for the John Deere X390 is 1.59 gal (6 L). Use it as the cooling-system refill amount, then check the radiator or overflow level after the engine has warmed up and cooled down
Coolant service note
The John Deere X390 should be filled by capacity first, then verified by the actual level marks after the engine cools
Refill check
After a drain and refill on the John Deere X390, the cooling system can burp air. Recheck the level after the first warm-up and cool-down cycle
Engine context
The John Deere X390 engine specs listed with this page are engine model Kawasaki FR691V, engine horsepower 22 hp, and engine displacement 44.3 cu in (0.73 L). They help identify the machine, but they are not a substitute for the coolant capacity
John Deere X390 Coolant Capacity FAQ
What is the full coolant refill capacity for the John Deere X390?
Plan around 1.59 gal (6 L) when servicing coolant on the John Deere X390. Recheck the system when cool because air pockets can lower the level
Should the John Deere X390 coolant be checked hot or cold?
Yes. Use the 1.59 gal (6 L) figure as the refill guide, but always recheck level after warm-up and cool-down because trapped air can move through the system
What signs mean the John Deere X390 coolant should be flushed?
If the John Deere X390 coolant is only slightly low and otherwise clean, topping up with compatible coolant can be enough. If condition is poor, drain and refill instead
Official information note
Mistakes do happen. Tractor coolant capacity and coolant type can change by year, market, engine, radiator setup and service procedure. Check the operator manual, service manual and official deere.com website before draining, flushing or refilling the cooling system.
