Compared with a broad compact tractor guide, not the full tractor dataset.
John Deere 1120 Coolant Service Notes
Coolant capacity note
The John Deere 1120 cooling system is listed at 2.75 gal (10.4 L). Final level can settle after the first heat cycle, so recheck the level after service
Coolant service note
For a full coolant service on the John Deere 1120, plan around 2.75 gal (10.4 L) and match the listed coolant guidance: John Deere Cool-Gard II
Coolant type note
The John Deere 1120 coolant type is John Deere Cool-Gard II. Wrong coolant chemistry can reduce corrosion, freeze and boil protection
Refill check
After a drain and refill on the John Deere 1120, the cooling system can burp air. Recheck the level after the first warm-up and cool-down cycle
Engine context
The John Deere 1120 engine specs listed with this page are engine horsepower 51 hp and engine displacement 164.5 cu in (2.7 L). They help identify the machine, but they are not a substitute for the coolant capacity
John Deere 1120 Coolant Capacity FAQ
How much coolant does the John Deere 1120 take?
Plan around 2.75 gal (10.4 L) when servicing coolant on the John Deere 1120. Recheck the system when cool because air pockets can lower the level
Does the John Deere 1120 use John Deere Cool-Gard coolant?
Coolant type for the John Deere 1120 is listed as John Deere Cool-Gard II. If the system has been filled with something else before, confirm compatibility before mixing
Do I need to recheck coolant level after servicing the John Deere 1120?
Yes. Use the 2.75 gal (10.4 L) figure as the refill guide, but always recheck level after warm-up and cool-down because trapped air can move through the system
When should contaminated coolant be replaced in the John Deere 1120?
If the John Deere 1120 coolant is only slightly low and otherwise clean, topping up with compatible coolant can be enough. If condition is poor, drain and refill instead
Can I mix coolant types when topping up the John Deere 1120?
Match coolant by specification, not just color. For the John Deere 1120, the listed coolant guidance is John Deere Cool-Gard II. If compatibility is unclear, flush and refill rather than mixing types
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.
