What is the reason for oil leakage in the distribution valve of the CAT 320 excavator?

The main reasons for oil leakage in the distribution valve of the CAT 320 excavator include the following aspects:

Aging or damage of seals: Long term use and the impact of the working environment can cause seals to lose their elasticity and fail to seal effectively, leading to oil leakage.

Hydraulic oil pollution: Hydraulic oil contains impurities, particles, etc., which may cause wear on the valve core and seat when flowing through the distribution valve, damage the sealing surface, and lead to oil leakage.

Improper installation: For example, the torque of the fastening bolts does not meet the requirements, or the installation position of the seals is incorrect, which may cause oil leakage.

External influence: The severe vibration and impact of the excavator during operation may cause the components of the distribution valve to loosen, leading to oil leakage.

For these reasons, the following effective maintenance methods can be adopted:

Replace seals: In case of aging or damage to seals, it is necessary to replace them with new ones in a timely manner and ensure that their quality is reliable and meets the working requirements of the excavator.

Replace hydraulic oil and clean the system: If oil leakage is caused by hydraulic oil contamination, clean the hydraulic oil first and clean the entire hydraulic system to remove impurities and pollutants.

Reinstall the distribution valve: For issues with improper installation, it is necessary to reinstall the distribution valve correctly, tighten the bolts according to the specified torque, and ensure that the seals are installed in place.

Tighten loose parts: If the loose parts are caused by vibration and impact, it is necessary to tighten the loose parts and check whether the relevant components are damaged. If damaged, replace them in a timely manner.

Preventive measures include:

Regular inspection and maintenance: Regularly inspect the sealing components and installation of the distribution valve to ensure that it is in good condition.

Use high-quality hydraulic oil: Choose high-quality hydraulic oil and replace it regularly to avoid hydraulic oil contamination.

Proper installation and maintenance: During the installation and maintenance process, strictly follow the operating procedures to ensure that all components are correctly installed and securely fastened in place.

Through the above measures, the problem of oil leakage in the Carter 320 distribution valve can be effectively reduced, ensuring the normal operation of the second-hand excavator.