Swing Gearbox Fit for Excavator Hyundai R335-9
Swing Gearbox Fit for Excavator Hyundai R335-9
The Swing Gearbox, also known as the slewing ring gearbox, is a key component of the excavator. It plays a crucial role in the rotation of the upper part of the excavator, including the cab, boom, arm, and bucket. Here are some important features of the Swing Gearbox:
- Provides smooth and precise rotation for the excavator
- Transfers power from the hydraulic motor to the slewing ring, allowing the upper structure to rotate continuously
- Reduces the load on the hydraulic system by transferring torque from the upper structure to the lower structure

Installation and Functionality
The Swing Gearbox is typically installed on the excavator's undercarriage and is responsible for the rotation of the upper structure. It consists of a housing, slewing ring, hydraulic motor, and other components. The gearbox works by receiving hydraulic power from the excavator's hydraulic system and transferring it to the slewing ring. The slewing ring is then able to rotate the upper structure of the excavator. Here is an image of the Swing Gearbox installed on the excavator:

Compatibility and Parameters
Our Swing Gearbox is specifically designed to fit Excavator Hyundai R335-9. Before purchasing, it is important to determine the following parameters:
| Parameter | Description |
|---|---|
| Machine model | The make and model of the excavator |
| Swing circle diameter | The size of the excavator's swing circle |
| Number of mounting holes | The number of mounting holes on the gearbox |
Signs of Wear and Tear
Here are some signs that indicate it is time to replace the Swing Gearbox:
- Abnormal noise during rotation
- Increased vibration during operation
- Difficulty rotating the upper structure
- Leaking hydraulic fluid
- Unusual wear on the teeth of the slewing ring
Maintenance Tips
Proper maintenance can significantly extend the lifespan of the Swing Gearbox. Here are some tips:
- Regularly check for leaks and worn components
- Keep the Swing Gearbox clean and free of debris
- Ensure the hydraulic system is free of contaminants
- Replace hydraulic fluid and filters as recommended by the manufacturer
- Inspect and replace worn or damaged seals and bushings
Compatible Brands and Models
Our Swing Gearbox is compatible with a wide range of excavator brands and models. Some of the most common ones include:
- Caterpillar
- Komatsu
- Hitachi
- Volvo
- Doosan
Please note that we do not sell products for the above brands and models. The compatibility list is provided for customer convenience only.
About Us
We are a specialized manufacturer of high-quality spare parts for construction machinery such as excavators and bulldozers. Our company has various production equipment and advanced processing technology. We have a high-quality production, design, and marketing team. Our main products include walking reducer assemblies, slewing reducer assemblies, gears, gear rings, transmission shafts, planetary carriers, wheel hubs, pump shells, slewing ring seats, end covers, gaskets, bearings, and oil seals. We produce more than 12,000 transmission parts for over 624 machine models.
Author: Miya
Product Quick Detail:
- Standard and non-standard available
- With high quality and competitive price
- Prompt delivery
- Packing as per customer’s demand.
We promise will offer the best price by the high quality in china! We also accept special order about the products. If you are interested in our products. Please do not hesitate to let us know.We are pleased to give you the detailed information.We promise that our products would be safety and were in high quality and reasonable price. If you are interested in our products, please contact us asap.We are sincerely looking for your cooperation.
Most of our products are exported to Europe or Americas, both standard and nonstandard products available. We can produce as per your drawing or sample. Material can be standard or as per your special request. If you choose us, you choose reliable.

Materials Available
1. Stainless Steel: SS201, SS303, SS304, SS316, SS416, SS420
2. Steel:C45(K1045), C46(K1046),C20
3. Brass:C36000 ( C26800), C37700 ( HPb59), C38500( HPb58), C27200(CuZn37), C28000(CuZn40)
4. Bronze: C51000, C52100, C54400, etc
5. Iron: 1213, 12L14,1215
6. Aluminum: Al6061, Al6063
7.OEM according to your request
Surface Treatment
Annealing, natural canonization, heat treatment, polishing, nickel plating, chrome plating, zinc plating,yellow passivization, gold passivization, satin, Black surface painted etc.
Processing Method
CNC machining, punch,turning, milling, drilling, grinding, broaching, welding and assembly
QC & Certificate
Technicians self-check in production,final-check before package by professional Quality inspector
ISO9001:2008 , ISO14001:2001,ISO/TS 16949:2009
Package & Lead Time
Size: Drawings
Wooden Case/Container and pallet, or as per customized specifications.
15-25days samples. 30-45days offcial order
Port: Shanghai/Ningbo port


