OEM HITACHI EX100 120-5 SWING DEVICE SLEW BOX PIN SPRING PLANETARY 1 2 (OEM HI 4134502) | Tonkee®

OEM HITACHI EX100 120-5 SWING DEVICE SLEW BOX PIN SPRING PLANETARY 1 2 (OEM HI 4134502) | Tonkee®

HITACHI EX100 120-5 SWING DEVICE SLEW BOX PIN SPRING PLANETARY 1 2 (OEM HI 4134502) | Tonkee®
Durability: This component is built to withstand the harsh working conditions of construction and excavation sites. It is engineered for long-term durability, reducing the need for frequent replacements and maintenance.
Maintenance: While the pin spring planetary is durable, it still requires regular inspection and maintenance to ensure optimal performance. Lubrication and cleaning are essential to prevent premature wear and extend the component's lifespan.
HITACHI EX100 120-5 SWING DEVICE SLEW, BOX PIN SPRING PLANETARY 1 2 (OEM HI 4134502) | Tonkee®

The swing device slew box pin spring planetary is part of the swing drive system of the excavator.


The swing drive system is responsible for rotating the excavator's upper structure, including the cab, boom, and bucket, in a controlled and precise manner. This rotation is essential for digging, lifting, and maneuvering the machine during various construction and excavation tasks.

The primary function of the pin spring planetary is to provide stability and control during the swinging motion of the excavator. It ensures that the upper structure rotates smoothly and efficiently, allowing the operator to perform tasks with precision and safety. This component is essential for maintaining the excavator's balance and preventing excessive wear and tear on other parts of the machine.

Material: The pin spring planetary is typically made of high-strength steel or alloy to withstand the heavy loads and stresses encountered during excavation operations.

Dimensions: The exact dimensions of the pin spring planetary may vary depending on the specific model and design of the Hitachi EX100-5 excavator. However, it is typically a compact and robust component designed to fit within the swing drive system.

Functionality: The pin spring planetary consists of multiple components, including pins, springs, and planetary gears. These components work together to provide the necessary torque and rotation to the swing drive system, allowing the excavator to pivot smoothly and precisely.

Compatibility: The HI 4134502 pin spring planetary is designed specifically for use in Hitachi EX100-5 and EX120-5 excavators.


It is an OEM (Original Equipment Manufacturer) part, ensuring a perfect fit and compatibility with the machine.

Durability: This component is built to withstand the harsh working conditions of construction and excavation sites. It is engineered for long-term durability, reducing the need for frequent replacements and maintenance.

Maintenance: While the pin spring planetary is durable, it still requires regular inspection and maintenance to ensure optimal performance. Lubrication and cleaning are essential to prevent premature wear and extend the component's lifespan.

Installation: Proper installation is crucial to ensure the pin spring planetary functions correctly. It should be installed by trained technicians who are familiar with the excavator's hydraulic systems.
BOX PIN SPRING PLANETARY 1 2 (OEM HI 4134502) | Tonkee® HITACHI EX100 120-5 SWING DEVICE SLEW
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