Swing Gearbox Fit for Excavator Sumitomo SH120 A1
Swing Gearbox Fit for Excavator Sumitomo SH120 A1

Introduction
A swing gearbox is an essential component of an excavator that helps in rotating the upper structure of the machine. It is a complex system comprising gears, bearings, and other mechanical components that enable smooth rotation of the excavator.
Functions and Usage
- Rotates the excavator upper structure
- Helps in positioning the excavator bucket or attachment
- Enables movement of the excavator from one place to another

Installation and Working Principle
The swing gearbox is usually installed on the excavator's revolving frame, near the machinery's upper part. The gearbox rotates with the swing gear, which is responsible for rotating the excavator upper structure. A hydraulic motor drives the gearbox, which, in turn, rotates the swing gear.
Working Principle
When the hydraulic motor rotates the gearbox, the gearbox's gears rotate the swing gear, which, in turn, rotates the upper structure of the excavator. The gearbox's gears work on the principle of friction, and the bearings help reduce the friction force.
Compatibility and Parameters
Our swing gearbox is compatible with the Excavator Sumitomo SH120 A1 model. Before purchasing, customers need to ensure the following parameters:
| Parameter | Description |
|---|---|
| Swing gear diameter | The diameter of the swing gear |
| Number of teeth | The number of teeth on the swing gear |
| Rotation direction | The direction of rotation of the gearbox |
Signs of Replacement
Some signs indicate that the swing gearbox needs replacement:
- Strange noises when operating
- Difficulty in rotating the upper structure
- Low efficiency of the hydraulic system
Daily Maintenance
Proper maintenance can extend the swing gearbox's lifespan. Some maintenance tips are:
- Regularly check the gearbox oil level and top it up if necessary
- Inspect the gearbox for leaks
- Check the gearbox's gears and bearings for any damage
- Clean the gearbox and gears of debris and dirt
Compatible Brands and Models
We can adapt our products to various excavator brands and models, including but not limited to:
- Caterpillar
- John Deere
- Komatsu
About Our Company
We are a leading manufacturer of high-quality engineering machinery accessories such as walking decelerator assemblies, rotary decelerator assemblies, gears, gear rings, transmission shafts, planetary frames, wheel hubs, pump shells, rotary shaft seats, end caps, gaskets, bearings, oil seals, and other supporting products. Our extensive product range includes over 12,000 transmission parts for more than 678 different machine models. We have modern production equipment, excellent processing technology, and a high-quality production and marketing team.
Author: Miya
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