Swing Gearbox Fit for Excavator Komatsu PC120
Swing Gearbox Fit for Excavator Komatsu PC120

Introduction
Swing gearbox, also known as swing drive or slewing gearbox, is a key component of the excavator's rotation system. Its main function is to transfer power from the hydraulic motor to the excavator's slewing ring, which enables the excavator to rotate in a continuous 360-degree motion. The following are the specific functions and uses of the swing gearbox:
- Allows the excavator to rotate in a continuous 360-degree motion
- Transfers power from the hydraulic motor to the slewing ring
- Controls the speed and direction of the excavator's rotation
- Provides a stable and reliable rotation system for the excavator

Installation and Working Principle
The swing gearbox is installed in the excavator's upper structure, between the cab and the undercarriage. It is connected to the hydraulic motor and the slewing ring through a series of hydraulic hoses and fittings. When the operator controls the swing function, hydraulic oil is directed to the swing gearbox, which then transfers the power to the slewing ring and rotates the excavator.
Compatibility and Parameters
Our swing gearbox is specifically designed to fit Excavator Komatsu PC120. Before purchasing, customers need to determine the following parameters:
| Parameter | Description |
|---|---|
| Excavator model | Komatsu PC120 |
| Weight | XX kg |
| Input torque | XX Nm |
| Output torque | XX Nm |
| Maximum output speed | XX rpm |
When to Replace the Swing Gearbox
There are several signs that may indicate the need to replace the swing gearbox:
- Unusual noises or vibrations coming from the gearbox
- Difficulty in rotating the excavator
- Leaking hydraulic oil around the gearbox
- Excessive wear or damage to the gearbox components
Maintenance for Extended Lifespan
Regular maintenance of the swing gearbox can help extend its lifespan. The following are some maintenance tips:
- Check the gearbox oil level and quality regularly
- Replace the gearbox oil and filter according to the manufacturer's recommendations
- Inspect the gearbox components for wear and damage
- Clean the gearbox and surrounding area to prevent debris buildup
Compatible Brands and Models
Our swing gearbox can also be used for various other excavator brands and models, including but not limited to:
- Caterpillar
- Hitachi
- Kobelco
- Volvo
Please note that we do not sell products for the above brands and models. The brands and models mentioned are for customer convenience only.
About Us
We are a company that specializes in producing high-quality spare parts for construction machinery such as excavators and bulldozers. Our company has various production equipment and advanced processing technology, and we have a high-quality production design and marketing team. Our main products include walking reducer assemblies, rotary reducer assemblies, gears, pinions, transmission shafts, planetary carriers, hubs, pump housings, slewing bearing housings, end covers, washers, bearings, oil seals, and other supporting products. Our company's production of transmission parts for excavators and bulldozers has exceeded 12,000 kinds, suitable for more than 588 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


