2. Remove the cap from the reservoir. Be careful, as the oil may be hot.
3. Add hydraulic oil to the reservoir. Use a funnel to avoid spilling. The oil level should be between the "full" and "add" marks on the dipstick.
4. Replace the cap on the reservoir.
5. Start the tractor and let it run for a few minutes. This will circulate the oil and help to mix it with the old oil.
6. Check the oil level again. If it is low, add more oil.
Here are some additional tips for adding hydraulic oil to a John Deere 2240:
* Use the correct type of oil. The recommended oil is John Deere Hy-Gard Hydraulic Oil.
* Do not overfill the reservoir. This can cause the oil to foam, which can damage the hydraulic system.
* Check the oil level regularly. The oil level should be between the "full" and "add" marks on the dipstick.
* Change the oil every 1000 hours of operation.