Replacement Hydraulic Oil Cooler for Kobelco SK200-6 Excavator

1. Basic Definition

This product is a Replacement Hydraulic Oil Radiator (also commonly called a Hydraulic Oil Cooler or Heat Exchanger). It is an aftermarket part designed to directly replace the original hydraulic cooler on a Kobelco SK200-6 excavator.

Its primary function is to dissipate heat generated by the hydraulic system during operation.

2. Why is it Needed?

Hydraulic systems generate significant heat from:

• Fluid friction within pumps, valves, and cylinders.

• Compression of the hydraulic fluid.

• Continuous operation under heavy loads.

If the hydraulic oil gets too hot, it leads to:

• Reduced Lubrication: Thinning of the oil, leading to increased wear and tear on pumps and motors.

• Seal Damage: High heat degrades seals and O-rings, causing leaks.

• Loss of Efficiency: The hydraulic system becomes less powerful and responsive.

• System Failure: In extreme cases, overheating can cause complete hydraulic system failure.

The cooler prevents this by transferring heat from the hot hydraulic oil to the surrounding air, maintaining the oil at an optimal operating temperature.

3. Key Features of a Quality Replacement Cooler

• Direct Fit: Engineered to match the exact dimensions, mounting points, and port connections (thread size and type) of the original Kobelco part, ensuring easy installation without modifications.

• Durable Core: Typically constructed from aluminum or copper-brass fins and tubes. Aluminum offers excellent heat transfer and is lightweight; copper-brass is highly durable and resistant to corrosion.

• Robust Tanks/Headers: The end tanks are often made from cast aluminum or heavy-duty steel to withstand pressure and vibration.

• Pressure Rating: Designed to handle the specific operating pressure of the Kobelco SK200-6's hydraulic system.

• Efficient Cooling Capacity: Designed to provide equal or better cooling performance compared to the original equipment manufacturer (OEM) part.

4. When to Replace the Hydraulic Cooler

You should consider replacing the cooler if you notice:

• External Hydraulic Oil Leaks: from the cooler itself, indicating a crack or seal failure.

• Persistent Hydraulic Overheating: (high-temperature warnings on the dashboard) even after fluid and filter changes, suggesting the cooler is clogged or damaged internally.

• Physical Damage: Bent fins, dents, or impact damage that restricts airflow or compromises integrity.

• Internal Clogging: Contamination (from failed seals, metal shavings) that blocks the tubes, reducing flow and cooling efficiency. This is often difficult to clean and usually necessitates replacement.