Buy HITACHI EX-1-2-3-5 ZAXIS ZX SERIES PILOT VALVE SERVO LEVER OIL SEAL (20 X 12.50 X 4MM) | Tonkee®

The oil seal has specific dimensions, measuring 20 millimeters in inner diameter, 12.50 millimeters in outer diameter, and 4 millimeters in thickness.

These dimensions are critical to its function as they determine how it fits and seals within the pilot valve servo lever assembly. The precision of these measurements ensures that the oil seal can effectively prevent hydraulic fluid from leaking and contaminating the surrounding components.

The pilot valve servo lever is a key part of the excavator's hydraulic system, responsible for controlling the flow of hydraulic fluid to various hydraulic cylinders and motors. This control is essential for the precise movement of the excavator's boom, arm, and bucket, enabling operators to perform digging, lifting, and other tasks with accuracy and control.

The oil seal's primary function is to prevent hydraulic fluid from escaping from the pilot valve servo lever assembly. It creates a tight seal between moving components, such as the lever and the valve body, to maintain hydraulic pressure and enable responsive control. Without a reliable oil seal, hydraulic fluid leakage can occur, leading to reduced performance, increased maintenance costs, and potential safety hazards.

The choice of materials for this oil seal is critical to its durability and effectiveness.

It is typically made from high-quality rubber or synthetic elastomers that can withstand the harsh operating conditions of an excavator's hydraulic system. These materials offer excellent resistance to hydraulic fluids, temperature extremes, and wear, ensuring a long service life for the oil seal.

Installation and maintenance of the oil seal require precision and attention to detail. When replacing the seal, it's essential to clean and inspect the sealing surfaces thoroughly to ensure there are no scratches or damage that could compromise the seal's effectiveness. Proper lubrication during installation is also crucial to prevent friction and wear during operation.

Regular inspection and replacement of the oil seal are part of routine maintenance for Hitachi excavators to ensure continued reliable performance. Any signs of oil leakage or wear on the seal should prompt immediate action to prevent more extensive damage to the hydraulic system.

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