For the John Deere 4066R, coolant capacity is 12.93 gal (48.9 L). Fill slowly and recheck the radiator or overflow level after the first heat cycle.
Coolant capacity12.93 gal (48.9 L)Cooling system refill amount
John Deere 4066R Coolant Capacity Specs
Coolant capacity
12.93 gal (48.9 L)
Engine horsepower
65 hp
Engine displacement
128.1 cu in (2.1 L)
John Deere 4066R Coolant Capacity Guide
Coolant capacity guide
This model
12.92 gal
Class low
1.5 gal
Class typical
3.5 gal
Class high
6 gal
Compared with a broad compact tractor guide, not the full tractor dataset.
John Deere 4066R Coolant Service Notes
Coolant capacity note
For the John Deere 4066R, the coolant capacity is 12.93 gal (48.9 L). That is the buying and refill guide for a full cooling-system service
Coolant service note
Use 12.93 gal (48.9 L) as the refill guide for the John Deere 4066R. The final level should still be confirmed at the radiator or overflow bottle
Refill check
Use the 12.93 gal (48.9 L) capacity to buy enough coolant for the John Deere 4066R, but finish the job by checking the actual level marks
Engine context
The engine context for the John Deere 4066R is engine horsepower 65 hp and engine displacement 128.1 cu in (2.1 L). Use this for comparison only; the refill amount is the coolant capacity above
John Deere 4066R Coolant Capacity FAQ
How many litres of coolant does the John Deere 4066R take?
Use 12.93 gal (48.9 L) as the coolant-change amount for the John Deere 4066R. The final level should still be checked at the radiator or overflow bottle
How do I avoid air pockets when refilling the John Deere 4066R coolant?
The 12.93 gal (48.9 L) number helps you plan the refill. The actual finish point is the correct level mark after warm-up, cool-down and leak checking
Should old coolant be drained from the John Deere 4066R?
For the John Deere 4066R, use the 12.93 gal (48.9 L) capacity when planning a full drain or flush. Topping up only solves low level, not worn-out coolant
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.
