Coolant capacity for the John Deere Z840A is 1.59 gal (6 L). The coolant type is listed as John Deere Cool-Gard II, and the antifreeze mix is 40/60 coolant and water mix.
Coolant capacity1.59 gal (6 L)Cooling system refill amount
Antifreeze mix40/60 coolant and water mixFreeze/boil protection
John Deere Z840A Coolant Capacity Specs
Coolant capacity
1.59 gal (6 L)
Coolant type
John Deere Cool-Gard II
Antifreeze mix
40/60 coolant and water mix
Engine horsepower
34 hp
John Deere Z840A 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 Z840A Coolant Service Notes
Coolant capacity note
The John Deere Z840A cooling system is listed at 1.59 gal (6 L). Final level can settle after the first heat cycle, so recheck the level after service
Coolant service note
A proper coolant change on the John Deere Z840A means using the 1.59 gal (6 L) capacity and keeping the coolant chemistry consistent with John Deere Cool-Gard II and 40/60 coolant and water mix
Coolant type note
For the John Deere Z840A, coolant choice is listed as John Deere Cool-Gard II. Capacity tells you how much; coolant type tells you what to use
Antifreeze mix note
The John Deere Z840A coolant mix guidance is 40/60 coolant and water mix. This matters most in freezing weather, hot work and long service intervals
Refill check
For the John Deere Z840A, 1.59 gal (6 L) is the planned refill amount. The final level may need a small top-up after trapped air leaves the system
Engine context
The engine context for the John Deere Z840A is engine horsepower 34 hp. Use this for comparison only; the refill amount is the coolant capacity above
John Deere Z840A Coolant Capacity FAQ
What is the refill amount for the John Deere Z840A cooling system?
For coolant service, the John Deere Z840A is listed at 1.59 gal (6 L). Buy enough coolant for that amount and confirm the final level at the machine
What should I match when topping up coolant in the John Deere Z840A?
The listed coolant type for the John Deere Z840A is John Deere Cool-Gard II. Match that coolant chemistry before topping up or flushing the system
Should I use premixed coolant in the John Deere Z840A?
The John Deere Z840A coolant mix guidance is 40/60 coolant and water mix. Keep the mix consistent when topping up so freeze and boil protection stay in range
Should I run the John Deere Z840A after adding coolant?
Do not judge the job only by pouring in 1.59 gal (6 L). The final check is the actual radiator or overflow level after the system has burped air
When is a full coolant flush better than a top-up on the John Deere Z840A?
Topping up is fine for a small low-level correction. If the coolant is old, rusty, oily, diluted or the wrong type, drain and flush the system using the 1.59 gal (6 L) capacity as the refill guide
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.
