The John Deere 40C takes 1.58 gal (6 L) of coolant. After refilling, run the engine, let it cool and confirm the final level.
John Deere 40C Coolant Capacity Specs
| Coolant capacity | 1.58 gal (6 L) |
|---|---|
| Engine horsepower | 38 hp |
| Engine displacement | 103.7 cu in (1.7 L) |
John Deere 40C Coolant Capacity Guide
Coolant capacity guide
Compared with a broad older small tractor guide, not the full tractor dataset.
John Deere 40C Coolant Service Notes
| Coolant capacity note | The useful service number here is 1.58 gal (6 L). Keep some extra coolant available because trapped air can lower the level after the first warm-up |
|---|---|
| Coolant service note | After refilling the John Deere 40C, run it to operating temperature and recheck after cool-down. Air pockets can make the level drop |
| Refill check | For the John Deere 40C, 1.58 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 40C is engine horsepower 38 hp and engine displacement 103.7 cu in (1.7 L). Use this for comparison only; the refill amount is the coolant capacity above |
John Deere 40C Coolant Capacity FAQ
What is the John Deere 40C cooling system capacity?
For coolant service, the John Deere 40C is listed at 1.58 gal (6 L). Buy enough coolant for that amount and confirm the final level at the machine
Can the John Deere 40C coolant level drop after refilling?
Do not judge the job only by pouring in 1.58 gal (6 L). The final check is the actual radiator or overflow level after the system has burped air
Should I flush the John Deere 40C cooling system or just top it up?
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 1.58 gal (6 L) capacity as the refill guide
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.
