Antifreeze mix40/60 coolant and water mixFreeze/boil protection
John Deere Z820A Coolant Capacity Specs
Coolant capacity
1 gal (3.7 L)
Coolant type
John Deere Cool-Gard II
Antifreeze mix
40/60 coolant and water mix
Engine model
Kawasaki FH721
Engine horsepower
25 hp
Engine displacement
40.9 cu in (0.67 L)
John Deere Z820A Coolant Capacity Guide
Coolant capacity guide
This model
1 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 Z820A Coolant Service Notes
Coolant capacity note
The main coolant number for the John Deere Z820A is 1 gal (3.7 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
Use 1 gal (3.7 L) as the refill amount for the John Deere Z820A, but do not mix coolant types blindly. The listed coolant detail is John Deere Cool-Gard II and 40/60 coolant and water mix
Coolant type note
The listed coolant type for the John Deere Z820A is John Deere Cool-Gard II. Match the coolant chemistry before topping up or flushing the system
Antifreeze mix note
The listed antifreeze mix for the John Deere Z820A is 40/60 coolant and water mix. Mix ratio affects freeze protection, boil protection and corrosion control
Refill check
When refilling the John Deere Z820A, do not pour in 1 gal (3.7 L) and walk away. Fill slowly, run the engine, let it cool and recheck the level
Engine context
For comparison, the John Deere Z820A engine details listed here are engine model Kawasaki FH721, engine horsepower 25 hp, and engine displacement 40.9 cu in (0.67 L). The coolant capacity remains the service number to use for refilling
John Deere Z820A Coolant Capacity FAQ
How many gallons of coolant does the John Deere Z820A hold?
The John Deere Z820A coolant capacity is 1 gal (3.7 L). Use this as the cooling-system refill amount and recheck the level after warm-up and cool-down
What antifreeze coolant type is listed for the John Deere Z820A?
Use John Deere Cool-Gard II or a coolant that clearly meets the same requirement for the John Deere Z820A. Do not rely on color alone because coolant color is not a perfect chemistry guide
Does the John Deere Z820A need a 50/50 coolant mix?
Use the listed 40/60 coolant and water mix mix when refilling the John Deere Z820A. Too much water weakens protection; too much concentrate can also reduce cooling performance
Why does coolant level drop after changing coolant in the John Deere Z820A?
The John Deere Z820A may need a small top-up after the first heat cycle. Fill slowly, watch for leaks and recheck the level when cool
Is topping up enough for the John Deere Z820A cooling system?
Use a full coolant service on the John Deere Z820A when the system needs fresh coolant, not just more coolant. Plan the refill around the 1 gal (3.7 L) capacity
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.
