The John Deere SST15 takes 1.5 gal (5.7 L) of coolant. After refilling, run the engine, let it cool and confirm the final level.
Coolant capacity1.5 gal (5.7 L)Cooling system refill amount
John Deere SST15 Coolant Capacity Specs
Coolant capacity
1.5 gal (5.7 L)
Engine horsepower
15 hp
Engine displacement
1.8 L (109.8 cu in)
John Deere SST15 Coolant Capacity Guide
Coolant capacity guide
This model
1.5 gal
Class low
0.8 gal
Class typical
2.5 gal
Class high
5 gal
Compared with a broad older small tractor guide, not the full tractor dataset.
John Deere SST15 Coolant Service Notes
Coolant capacity note
The useful service number here is 1.5 gal (5.7 L). Keep some extra coolant available because trapped air can lower the level after the first warm-up
Coolant service note
The John Deere SST15 should be filled by capacity first, then verified by the actual level marks after the engine cools
Refill check
After a drain and refill on the John Deere SST15, the cooling system can burp air. Recheck the level after the first warm-up and cool-down cycle
Engine context
The John Deere SST15 engine specs listed with this page are engine horsepower 15 hp and engine displacement 1.8 L (109.8 cu in). They help identify the machine, but they are not a substitute for the coolant capacity
John Deere SST15 Coolant Capacity FAQ
How much coolant should I buy for the John Deere SST15?
The cooling system capacity for the John Deere SST15 is 1.5 gal (5.7 L). This is the main refill figure for a drain, flush or coolant change
Do I fill the John Deere SST15 exactly to capacity or check the level marks?
Fill the John Deere SST15 slowly, run it with the heater/thermostat cycle where applicable, let it cool and check the level again. That helps catch trapped air
Can I just add coolant to the John Deere SST15 if the level is low?
Flush the John Deere SST15 cooling system if the coolant is dirty, contaminated, badly diluted or overdue for service. A simple top-up does not fix old coolant chemistry
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.
