Swing Gearbox Bearing Replacement

Swing Gearbox Bearing Replacement

Swing Gearbox Bearing Replacement


Swing gearboxes are critical components in excavators, responsible for the rotation of the upper structure. Over time, the bearings in the gearbox may wear out, leading to increased friction and decreased efficiency. In this article, we will explore the process of replacing swing gearbox bearings, from disassembly to reassembly.

Tools Required

  • Socket wrench set
  • Combination wrench set
  • Seal puller
  • Bearing puller
  • Bearing installer
  • Hammer
  • Torque wrench


The first step in replacing swing gearbox bearings is to disassemble the gearbox. This requires removing the gearbox from the excavator and separating the input and output shafts. The bearings can then be accessed and removed using a bearing puller.

Cleaning and Inspection

Once the bearings have been removed, the gearbox should be thoroughly cleaned and inspected for any damage or wear. Any damaged or worn parts should be replaced, and the gearbox should be reassembled with new bearings.


To reassemble the gearbox, the input and output shafts should be aligned and the bearings should be pressed into place using a bearing installer. The gearbox should be torqued to the manufacturer’s specifications and tested for proper operation before being reinstalled in the excavator.

Our Company

Swing GearboxWe are a professional gearbox factory specializing in the design and manufacture of various types of gearboxes, including planetary gearboxes, worm gearboxes, bevel gearboxes, and helical gearboxes. Our products are widely used in agricultural machinery, construction machinery, special vehicles, and industrial automation. Our advantages include:

  1. More than 20 years of experience in gearbox design and manufacture
  2. A comprehensive product line, from standard to customized
  3. Precision manufacturing processes and strict quality control
  4. Ongoing innovation in technology and product development
  5. Flexible customization services

Signs that Swing Gearbox Needs Replacement

  • Unusual noises during operation
  • If you hear unusual noises, such as grinding or clicking, during operation, it may indicate that the bearings in the gearbox are worn and need to be replaced.

  • Increased friction and decreased efficiency
  • If you notice that the excavator is experiencing increased friction and decreased efficiency during operation, it may be a sign that the gearbox bearings need to be replaced.

  • Leaking oil
  • If you notice oil leaking from the gearbox, it may indicate that the seals or bearings are worn and need to be replaced.

Swing Gearbox Buying Guide

Parameter Description
Excavator Model Determine the make and model of your excavator to ensure compatibility with the swing gearbox.
Swing Gear Ratio The swing gear ratio determines the speed and torque of the rotation. Choose a ratio that is appropriate for your application.
Input Power Determine the input power required for your application to ensure that the swing gearbox can handle the load.
Output Torque Determine the output torque required for your application to ensure that the swing gearbox can handle the load.
Operating Environment Determine the operating environment, including temperature, humidity, and exposure to dust and debris, to ensure that the swing gearbox is suitable for your application.

Compatible Excavator Brands and Models

  • Caterpillar 320
  • Komatsu PC200
  • Hitachi ZX200
  • Volvo EC210
  • Hyundai R210

Author: Miya