How to check hydraulic fluid level on John Deere tractor

In the world of agriculture, John Deere tractors stand as reliable companions, powering through fields to get the job done. One crucial aspect of tractor maintenance is keeping an eye on the hydraulic fluid level

Proper hydraulic fluid levels ensure the smooth operation of your John Deere tractor’s essential functions. 

In this article, we will know about how to check hydraulic fluid level on john Deere tractor. Remember this method is same for other models of John Deere like 4045e. If the level of hydraulic fluid is low, then the several problems occurs with your John Deere. So maintain the hydraulic level in your tractor.

Understanding the Importance of Hydraulic Fluid:

Hydraulic fluid plays a pivotal role in the functionality of a tractor’s hydraulic system. It serves as a vital lubricant, cooling agent, and power transfer medium, ensuring that various hydraulic components work seamlessly together. Regularly checking the hydraulic fluid level is akin to giving your tractor a health check, preventing potential issues and extending its lifespan.

How to check hydraulic fluid level on John Deere tractor

Now we are going to discuss the steps for checking the hydraulic fluid level on a John Deere tractor.

Step 1: Safety First

Before we delve into the steps of checking the hydraulic fluid level, safety should always be the top priority. Ensure your John Deere tractor is parked on level ground, and the engine is turned off. Engage the parking brake and let the tractor cool down to avoid any accidental burns.

Step 2: Locate the Hydraulic Reservoir

The hydraulic reservoir is the container that holds the hydraulic fluid. On most John Deere tractors, you can find the hydraulic reservoir near the engine. It typically has a dipstick or sight glass to indicate the fluid level.

Step 3: Clean the Area Around the Reservoir

To prevent any contaminants from entering the hydraulic system, clean the area around the hydraulic reservoir. Use a cloth or rag to wipe away any dirt or debris that may have accumulated.

Step 4: Identify the Fluid Level Indicator

As I mentioned earlier, John Deere tractors usually have either a dipstick or a sight glass to indicate the hydraulic fluid level. Familiarize yourself with the type of indicator your tractor has, as this will determine the method you use to check the fluid level.

Step 5: Checking Hydraulic Fluid Level with a Dipstick

If your John Deere tractor is equipped with a dipstick, follow these steps:

  • Remove the dipstick from the hydraulic reservoir.
  • Wipe the dipstick clean with a cloth.
  • Reinsert the dipstick fully into the reservoir.
  • Withdraw the dipstick and observe the fluid level. The dipstick will have markings indicating the proper level.

Step 6: Checking Hydraulic Fluid Level with a Sight Glass

If your tractor has a sight glass, here’s how you can check the hydraulic fluid level:

  • Locate the sight glass on the hydraulic reservoir.
  • Clean the sight glass to ensure clear visibility.
  • Observe the fluid level through the sight glass. There will be markings indicating the proper level.

Step 7: Adding Hydraulic Fluid (If Necessary)

If the fluid level is below the recommended level, it’s time to add hydraulic fluid. Use the appropriate type of hydraulic fluid recommended in your John Deere tractor’s manual.

  • Slowly add small amounts of hydraulic fluid at a time.
  • Allow time for the fluid to settle before rechecking the level.
  • Continue this process until the fluid level reaches the recommended range.

Step 8: Securely Close the Reservoir

After checking and adjusting the hydraulic fluid level, ensure that the dipstick is securely reinserted or that the sight glass cover is properly closed. This prevents contaminants from entering the hydraulic system and maintains the integrity of the fluid.

Step 9: Regular Maintenance Checks

Make it a habit to check the hydraulic fluid level regularly as part of your tractor maintenance routine. Regular checks help identify potential issues early on and contribute to the overall efficiency and longevity of your John Deere tractor.

How to Add hydraulic fluid to a John Deere tractor

To add hydraulic fluid to a John Deere tractor, you can follow these general steps:

  • Park the tractor on level ground with the implements down.
  • Wipe away any debris from the reservoir area.
  • Remove the hydraulic fluid reservoir cap and add the appropriate hydraulic fluid using a clean funnel. For John Deere tractors, the recommended fluid is the John Deere Hy-Gard Hydraulic and Transmission Oil.
  • To avoid overfilling the reservoir, add a little fluid at a time. 
  • After adding the fluid, it’s important to check the hydraulic fluid level. This can typically be done by viewing the oil level in the sight glass, which is usually located behind the driver’s seat on John Deere tractors. The optimal level is just beneath the top mark on the glass, between the marks.


Taking a few minutes to check the hydraulic fluid level on your John Deere tractor is a small investment that pays off in the long run. It ensures the proper functioning of your tractor’s hydraulic system, preventing unnecessary wear and tear. 

By following these simple steps and incorporating regular maintenance checks into your routine, you contribute to the reliability and performance of your trusted John Deere companion in the fields.


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