The John Deere 6620 Premium coolant capacity is 13.49 gal (51.1 L). The listed coolant is John Deere Cool-Gard II, with The recommended coolant for the John Deere 6620 Premium tractor is John Deere Cool-Gard guidance.
Coolant capacity13.49 gal (51.1 L)Cooling system refill amount
Antifreeze mixThe recommended coolant for the John Deere 6620 Premium tractor is John Deere Cool-GardFreeze/boil protection
John Deere 6620 Premium Coolant Capacity Specs
Coolant capacity
13.49 gal (51.1 L)
Coolant type
John Deere Cool-Gard II
Antifreeze mix
The recommended coolant for the John Deere 6620 Premium tractor is John Deere Cool-Gard
John Deere 6620 Premium Coolant Capacity Guide
Coolant capacity guide
This model
13.49 gal
Class low
6 gal
Class typical
9.5 gal
Class high
14 gal
Compared with a broad 6 series guide, not the full tractor dataset.
John Deere 6620 Premium Coolant Service Notes
Coolant capacity note
The John Deere 6620 Premium coolant capacity is 13.49 gal (51.1 L). Treat it as a cooling-system amount, not a radiator-only top-up amount
Coolant service note
Use 13.49 gal (51.1 L) as the refill amount for the John Deere 6620 Premium, but do not mix coolant types blindly. The listed coolant detail is John Deere Cool-Gard II and The recommended coolant for the John Deere 6620 Premium tractor is John Deere Cool-Gard
Coolant type note
The listed coolant type for the John Deere 6620 Premium 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 6620 Premium is The recommended coolant for the John Deere 6620 Premium tractor is John Deere Cool-Gard. Mix ratio affects freeze protection, boil protection and corrosion control
Refill check
When refilling the John Deere 6620 Premium, do not pour in 13.49 gal (51.1 L) and walk away. Fill slowly, run the engine, let it cool and recheck the level
John Deere 6620 Premium Coolant Capacity FAQ
What coolant amount is listed for the John Deere 6620 Premium?
The John Deere 6620 Premium coolant capacity is 13.49 gal (51.1 L). Use this as the cooling-system refill amount and recheck the level after warm-up and cool-down
What coolant type does the John Deere 6620 Premium use?
Use John Deere Cool-Gard II or a coolant that clearly meets the same requirement for the John Deere 6620 Premium. Do not rely on color alone because coolant color is not a perfect chemistry guide
Does the John Deere 6620 Premium need a 50/50 coolant mix?
The John Deere 6620 Premium uses The recommended coolant for the John Deere 6620 Premium tractor is John Deere Cool-Gard where that mix is specified. Confirm the mix against your climate and manual
What is the final check after a John Deere 6620 Premium coolant change?
The John Deere 6620 Premium may need a small top-up after the first heat cycle. Fill slowly, watch for leaks and recheck the level when cool
Should I drain and refill the John Deere 6620 Premium coolant system?
Use a full coolant service on the John Deere 6620 Premium when the system needs fresh coolant, not just more coolant. Plan the refill around the 13.49 gal (51.1 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.
