Fuel tank capacity for the John Deere 4040S is 37 gal (140 L). Use that as the main refueling amount, with 18.5 gal (70 L) as the half-tank guide.
Fuel tank capacity37 gal (140 L)Empty-to-full tank amount
Half tank18.5 gal (70 L)Planning guide
5-gal cansabout 8 x 5-gal cans to have enough fuel from emptyPortable fuel estimate
John Deere 4040S fuel tank capacity specs
Fuel tank capacity
37 gal (140 L)
Fuel capacity in litres
140 L
Half tank amount
18.5 gal (70 L)
5-gallon fuel cans
about 8 x 5-gal cans to have enough fuel from empty
10-litre fuel jugs
15 x 10-L jugs
Fuel capacity is a tank-size figure. Actual top-up amount and runtime depend on remaining fuel, workload, throttle use, terrain and machine condition.
John Deere 4040S fuel planning notes
Fuel capacity note
The John Deere 4040S fuel tank is listed at 37 gal (140 L). Runtime changes heavily with load, throttle, terrain and implement use.
Refill planning
For an empty-to-full refill on the John Deere 4040S, plan for about 8 x 5-gal cans or 15 x 10-L jugs. Real fill amount can be slightly lower if fuel remains in the tank.
Fuel tank capacity guide
This model
37 gal
Guide low
6 gal
Guide typical
14 gal
Guide high
30 gal
Compared with a broad Compact / small utility tractor guide, not the full tractor dataset.
John Deere 4040S fuel capacity FAQ
How much fuel fits in the John Deere 4040S tank?
The John Deere 4040S holds 37 gal (140 L) of fuel. A normal top-up may take less if there is fuel already in the tank.
What is the John Deere 4040S fuel capacity in litres?
The John Deere 4040S fuel tank is 37 gal (140 L), which converts to about 140 litres.
What should the John Deere 4040S hold at half fuel?
Half a tank on the John Deere 4040S is about 18.5 gal (70 L). Treat it as a planning number because gauge accuracy varies.
How much portable fuel should I bring for the John Deere 4040S?
From empty, the John Deere 4040S needs about 8 x 5-gal cans or 15 x 10-L jugs. If the tank already has fuel, you will need less.
How long will the John Deere 4040S run on a full tank?
The John Deere 4040S may run very different hours on the same 37 gal (140 L) tank depending on loader use, PTO implements, mowing, travel and terrain. Use fuel capacity for planning, not as a fuel-burn rating.
How does the John Deere 4040S tank size compare?
For the John Deere 4040S, plan fuel before field work because a full empty-to-full refill is more than a quick splash from one small can.
Do I fill the John Deere 4040S exactly to capacity?
Use 37 gal (140 L) as a planning number. The safe finish point is the proper fill level, not squeezing in every last ounce.
Official information note
Mistakes do happen. Check the operator manual, service manual and official deere.com website for official fuel capacity specifications.
