Swing Gearbox Fit for Excavator Hitachi ZX120-3

Swing gearbox, also known as swing drive, is a gearbox that provides rotational power to the excavator's upper structure for 360-degree rotation. It is an essential component of the excavator's hydraulic system with the following functions:

• Enables the excavator to rotate in a full circle, allowing for maximum efficiency in material handling and excavation;
• Transfers power from the hydraulic pump to the excavator's upper structure;
• Provides braking force to stop the upper structure's rotation;
• Reduces the speed of the upper structure??s rotation, allowing for more precise and controlled movements;
• Distributes power to other excavator attachments that require hydraulic power.

Swing Gearbox Installation and Operation

The swing gearbox is located at the excavator??s upper structure and is responsible for turning the excavator's house. When the operator moves the joystick, the hydraulic pump sends oil to the swing gearbox, causing the house to rotate. The gearbox operates on the principle of a planetary gear system, which consists of a central sun gear, planet gears, and an outer ring gear.

Swing Gearbox Fit for Excavator Hitachi ZX120-3

Our Swing Gearbox is specially designed to fit Excavator Hitachi ZX120-3 model. Before purchasing, please confirm the following parameters:

When to Replace the Swing Gearbox

The following are signs that the excavator's swing gearbox needs to be replaced:

1. Noisy operation;
2. Leaking oil or hydraulic fluid;
3. Reduced or loss of swing power;
4. Difficulty in changing swing direction;
5. Complete failure of the gearbox.

Maintenance Tips for Swing Gearbox

The following everyday maintenance practices can help extend the lifespan of your swing gearbox:

• Regularly check for oil leaks;
• Keep the gearbox clean and free of debris;
• Ensure the gear oil is regularly changed and topped up;
• Replace damaged seals or bearings immediately;
• Avoid overloading the excavator's upper structure beyond its capacity.

Compatible Excavator Brands and Models

Our Swing Gearbox can fit various excavator brands and models. Some common brands and models include:

• Caterpillar: 336D, 345D, 349D
• Komatsu: PC200-6, PC300-7, PC400-5
• Volvo: EC210B, EC240B, EC360B

About Us

We are a leading manufacturer of high-quality engineering machinery spare parts, including walking reducer assemblies, rotary reducer assemblies, gears, drive shafts, planetary gears, wheel hubs, pump casings, rotary shaft seats, end covers, gaskets, bearings, oil seals, and many other supporting products. Our products cover more than 12,000 types of transmission components for over 567 models of excavators and bulldozers. Our company is equipped with various production equipment, advanced processing technology, and a high-quality production design and marketing team.