
Swing gearbox, also known as swing drive or swing gear reducer, is an important part of the excavator that mainly controls the rotation of the upper structure. It is designed to withstand the rigors of heavy-duty excavation work and has several key functions, including:
Our Swing Gearbox Fit for Excavator Komatsu PC400-7 is a top-quality product that is built to last and designed to meet the demanding needs of excavator operators.

The swing gearbox is located at the bottom of the excavator's upper structure, between the cab and the engine. Its main function is to transfer power from the engine to the hydraulic system, which then operates the boom, arm, and bucket of the excavator. The gearbox works by using a system of gears that rotate around an axis, which allows the upper structure of the excavator to rotate 360 degrees.
Our Swing Gearbox Fit for Excavator Komatsu PC400-7 is specifically designed to fit this particular model of excavator. Before purchasing, it is essential to confirm the following parameters:
| Parameter | Description |
|---|---|
| Model | Komatsu PC400-7 |
| Swing Ratio | 3.5 |
| Torque | 20000N.m |
| Weight | 350kg |
If you notice any of the following signs while operating your excavator, it may be time to replace the swing gearbox:
To extend the lifespan of your swing gearbox, it is essential to perform regular maintenance. Here are some tips:
Our Swing Gearbox Fit for Excavator Komatsu PC400-7 is just one of the many high-quality products we produce at our company. We are dedicated to manufacturing top-quality parts for construction machinery, including walking reducers, rotary reducers, gears, transmission shafts, planet carriers, hubs, pump shells, swing shaft seats, end caps, washers, bearings, and oil seals. Our parts are compatible with over 602 different machine models from various brands, including but not limited to:
We believe in providing our customers with the highest level of service and quality, and we are proud to offer a wide range of products that are designed to meet the needs of construction professionals around the world.
Author: Miya
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