Shop HITACHI EX120 200-2-3-5 CENTRE JOINT BUSHING 85 X 80.3 X 20 MM (OEM HI 4241780) | Tonkee®

The center joint bushing serves as a crucial pivot point in the excavator's structure, allowing the upper structure (which includes the cabin, engine, and hydraulic components) to rotate or "swing" relative to the lower undercarriage.

This swinging motion is essential for the excavator's mobility and maneuverability, as it enables the machine to reach various areas of the construction site without repositioning the entire unit. The center joint bushing is located at the center of this rotational mechanism, and its specifications are crucial for ensuring its proper function.

The dimensions of the center joint bushing, 85 x 80.3 x 20 mm, are precise and tailored to fit the specific requirements of the Hitachi EX120 200-2-3-5 excavators. The outer diameter of 85 mm, inner diameter of 80.3 mm, and thickness of 20 mm are carefully engineered to provide a snug and secure fit within the center joint assembly. This precise fit is essential for preventing excessive play or movement within the joint, which could lead to premature wear and reduced overall machine performance.

The choice of materials for the Tonkee® center joint bushing is crucial for its durability and longevity. It is typically constructed from high-quality materials that offer excellent resistance to wear, corrosion, and fatigue. These materials are selected to withstand the heavy loads, constant movement, and exposure to the elements that the center joint bushing will encounter during excavator operation.

Proper lubrication is vital for the longevity and performance of the center joint bushing.

The bushing should be adequately lubricated to reduce friction and minimize wear. Tonkee® center joint bushings are designed to retain lubrication effectively, ensuring that the rotating motion of the center joint remains smooth and free of excessive resistance.

Installation and replacement of the center joint bushing are critical tasks that require precision and expertise. The Tonkee® center joint bushing is designed to facilitate these processes. It should be installed by experienced mechanics or technicians who are familiar with the specific requirements of the Hitachi EX120 200-2-3-5 excavators. Proper installation ensures that the bushing is correctly aligned and secured within the center joint assembly.

Regular inspection and maintenance of the center joint bushing are essential to detect signs of wear or damage early. As the bushing experiences wear over time, it may develop play or looseness, affecting the excavator's stability and performance. Timely replacement of the bushing when needed is crucial to avoid more extensive and costly repairs down the line.

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