Radiator Overflow Expansion Tank for John Deere 7020/7030/7005/7J Series Tractors

Description

When you’re running big horsepower in the field and your coolant starts disappearing or you notice puddles under the tractor, it’s often a cracked or damaged expansion tank causing the problem. This tank is where your cooling system sends hot coolant when it expands, then recovers it as things cool down. A faulty expansion tank means lost coolant, air in the system, and potential overheating when you can least afford downtime.

Key Features

• Holds excess coolant safely during heat cycles to prevent system damage
• Durable construction designed to handle the pressure and temperature swings of heavy-duty operation
• Direct replacement design fits like the original with no modifications needed
• Proper venting allows system to breathe while keeping contaminants out
• Clear sight lines let you monitor coolant levels at a glance

Built for Real Farm Work

This expansion tank fits John Deere’s workhorse tractors from the 7020 series powerhouses like the 7720, 7820, and 7920, plus the newer 7030 series including the 7630 through 7930 models. It also fits the 7005 series utility tractors and the versatile 7J series models. These are serious machines that handle everything from heavy tillage and planting to harvest operations where consistent cooling is critical.

Made to Last

Farm cooling systems face extreme conditions – from subzero starts to scorching field work under load. This expansion tank uses materials engineered to resist cracking from temperature cycling and UV exposure. The mounting points are reinforced to handle vibration without developing stress cracks that lead to coolant loss.

Installation Notes

This is a direct bolt-in replacement for your original tank. Drain the cooling system before removal and take the opportunity to inspect hoses and clamps while you’re at it. When refilling, make sure to bleed all air from the system and check that the expansion tank is about one-third full when cold.