The John Deere 8400R coolant capacity is 7.57 gal (28.6 L). Use this as the cooling-system refill amount and recheck the level after the engine cools.
Coolant capacity7.57 gal (28.6 L)Cooling system refill amount
John Deere 8400R Coolant Capacity Specs
Coolant capacity
7.57 gal (28.6 L)
Engine horsepower
400 hp
Engine displacement
548 cu in (9 L)
John Deere 8400R Coolant Capacity Guide
Coolant capacity guide
This model
7.56 gal
Class low
10 gal
Class typical
16 gal
Class high
24 gal
Compared with a broad 8 series guide, not the full tractor dataset.
John Deere 8400R Coolant Service Notes
Coolant capacity note
The John Deere 8400R cooling system is listed at 7.57 gal (28.6 L). Final level can settle after the first heat cycle, so recheck the level after service
Coolant service note
Use 7.57 gal (28.6 L) as the refill guide for the John Deere 8400R. The final level should still be confirmed at the radiator or overflow bottle
Refill check
Use the 7.57 gal (28.6 L) capacity to buy enough coolant for the John Deere 8400R, but finish the job by checking the actual level marks
Engine context
The John Deere 8400R engine specs listed with this page are engine horsepower 400 hp and engine displacement 548 cu in (9 L). They help identify the machine, but they are not a substitute for the coolant capacity
John Deere 8400R Coolant Capacity FAQ
How much coolant does the John Deere 8400R take?
The John Deere 8400R takes 7.57 gal (28.6 L) of coolant. Final level can settle after trapped air leaves the cooling system
Do I need to recheck coolant level after servicing the John Deere 8400R?
After a coolant change on the John Deere 8400R, check for leaks, watch temperature and recheck the level once the engine cools down
When should contaminated coolant be replaced in the John Deere 8400R?
Low level, bad smell, rust, sludge, oil film or overheating are signs to inspect the John Deere 8400R cooling system rather than only topping it up
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.
