Description
You’re checking the coolant level on your John Deere 6000 or 6010 series and notice that sweet smell of antifreeze or spots on the ground under the expansion tank. When the O-ring that seals your expansion tank starts failing, it’s time to get it fixed before a small leak becomes a big problem that leaves you stranded in the field.
What You’re Getting
- Large-size O-ring specifically designed for expansion tank connections
- Heat and coolant-resistant material that won’t crack or harden like old rubber
- Direct replacement that restores proper system pressure and stops leaks
- Quality construction that handles the temperature swings and pressure cycles your cooling system faces
Built for Real Farm Work
Your 6000 or 6010 series tractor puts in long days running everything from hay balers to grain carts, and all that work generates serious heat. The expansion tank keeps your cooling system pressurized so it can handle those demanding conditions without boiling over or losing efficiency.
Made to Last
Cooling system O-rings take a beating from constant heat cycling and exposure to coolant chemicals. This replacement uses modern materials that stay flexible and maintain their seal far longer than the original equipment, giving you reliable service season after season.
Installation Notes
This is the large O-ring – if you need the small one, that’s part 58307. You’ll want to drain coolant below the tank level before starting, and clean both sealing surfaces thoroughly for the best seal. Pro tip: if one O-ring has failed, consider replacing both sizes while you’re at it since they’ve been through the same conditions.






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