Swing Gearbox Fit for Excavator Sumitomo SH120 A2
Swing Gearbox Fit for Excavator Sumitomo SH120 A2
The swing gearbox, also known as the swing drive or swing motor, is an essential component of an excavator's slewing system. As the name suggests, it is responsible for swinging the excavator's upper structure left or right, allowing for greater maneuverability and versatility on the job site. Here are some key features and uses of the swing gearbox:
- Transmits power to the excavator's slewing mechanism
- Enables precise and smooth movement of the upper structure
- Supports heavy loads and high torque requirements

Swing Gearbox Installation and Function
The swing gearbox is typically installed inside the excavator's upper structure, with its output shaft connected to the slewing bearing. When the operator uses the joystick to swing the upper structure, the swing gearbox converts the hydraulic power from the engine into mechanical power, which rotates the slewing bearing and turns the upper structure.
Our Swing Gearbox Fit for Excavator Sumitomo SH120 A2 is designed specifically to fit Sumitomo excavators, providing optimal performance and compatibility. Before purchasing, it's important to confirm the following parameters:
| Parameter | Description |
|---|---|
| Excavator Make and Model | Sumitomo SH120 A2 |
| Swing Ratio | Check excavator manual or consult with manufacturer |
| Output Torque | Consult with manufacturer |
| Mounting Flange Size | Check excavator manual or consult with manufacturer |

Signs You Need to Replace Your Swing Gearbox
Like any mechanical component, the swing gearbox can wear out over time and require replacement. Here are some common signs that your swing gearbox may need to be replaced:
- Unusual noises or vibrations during operation
- Irregular or jerky movements of the upper structure
- Lack of power or slow response time when swinging
- Leaking hydraulic fluid or damaged housing
Swing Gearbox Maintenance Tips
Proper maintenance can help extend the lifespan of your swing gearbox and prevent costly repairs. Here are some tips to keep your swing gearbox in top condition:
- Regularly check for leaks, cracks, or damage to the housing
- Change hydraulic fluid and filters according to manufacturer recommendations
- Keep the swing gearbox clean and free of debris
- Check for proper mounting and alignment
Compatible Excavator Brands and Models
Our Swing Gearbox Fit for Excavator Sumitomo SH120 A2 is just one of the many high-quality, precision-engineered parts we offer for construction machinery. We specialize in producing a wide range of components, including:
- Travel and swing gearboxes
- Gears, shafts, and transmission parts
- Planetary gears, hubs, and pump casings
- Washers, bearings, and oil seals
We offer over 12,000 different parts for more than 679 different machine models, including popular brands like Caterpillar, Komatsu, and Hitachi. Please note that we do not sell products under these brand names but can manufacture compatible parts for them.
About Our Company
At our company, we are dedicated to producing high-quality, reliable replacement parts for construction machinery. We use advanced manufacturing equipment and techniques to ensure precise tolerances and optimal performance. Our team of experienced engineers and marketers is committed to providing excellent service and support to our customers worldwide.
Thank you for choosing our Swing Gearbox Fit for Excavator Sumitomo SH120 A2. Contact us today to learn more about our products and services.
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


