A variety of construction machinery are active on the construction site. Hydraulic excavator is one of the main equipment of these construction machinery, and the hydraulic system is one of the important systems of these equipment.
For a fully hydraulic excavator, it can be said that the hydraulic system, like the blood circulation system of the human body, is distributed throughout the excavator. It includes hydraulic oil tank, main pump, multi-channel valve, various pipelines, oil cylinders and motors that perform various actions. These hydraulic components are precision machined. They have high requirements for the maintenance of the hydraulic system. Improper or no maintenance will lead to failure, This will cause the machine to stop and bring you losses.
Keep the system clean
(1) Change hydraulic oil and filter regularly
Good hydraulic oil contains a variety of additives, which can prevent oil deterioration.
However, these additives will lose their effectiveness after a period of time. Therefore, the oil should be changed regularly to ensure that the additives work.
The filter can only absorb a limited number of dirt particles and other impurities from the oil.
When replacing the hydraulic oil filter, please check whether there are metal particles or debris at the bottom of the filter; If there is copper or iron filings, it indicates that the hydraulic pump, hydraulic motor or valve may have been damaged or will be damaged. If there is rubber, it indicates that the hydraulic cylinder seal is damaged.
(2) Regularly drain the oil tank dirt
Regularly draining the water and sediment in the oil tank is very important for removing impurities in the oil, but it is also very important to regularly replace the hydraulic oil in the whole hydraulic system. This is a reliable method to completely remove system impurities, oxidized hydraulic oil and other harmful impurities. Then, clean hydraulic oil recommended by Hitachi construction machinery should be added to the hydraulic system again.
Please drain the dirt in the oil tank of the hydraulic oil tank every 250 working hours.
(3) Cleaning
If the hydraulic oil is contaminated, especially when the pump, oil cylinder and motor are damaged, all the hydraulic oil must be replaced and the oil tank must be cleaned.
Keep the work area clean
When adding hydraulic oil to the oil tank or refilling hydraulic oil, ensure that the area around the filter tank cover is clean.
Use only clean funnels or containers.
Do not bring dirt into the system.
When maintaining the hydraulic system, only use clean plastic plugs to seal the ends of the lines.
When maintaining hydraulic components, the workbench must be clean.
Check the condition of the tools used. They should also be very clean.
