For full hydraulic excavator can said hydraulic system, like the body's blood circulation system as throughout the excavator, Sony to hydraulic tools that it contains 20 hydraulic oil tank, the main pump, multi way valve, the pipeline and executing the action of the oil cylinder, motor parts, these hydraulic components are the precision machining, their maintenance of the hydraulic system have higher requirements, if improper maintenance or not maintenance will lead to failure, resulting in machine downtime, also bring a loss to you.

1. Keep the hydraulic oil clean.

Sony said the oil hydraulic tools to store in a clean place, oil or fuel must be cautious. Use a clean funnel equipped with a fine mesh filter to pour oil from the container into the tank.. Of course, the oil you use must be the recommended type of Hitachi.

2. Keep the system clean.

(1) regular replacement of hydraulic oil and filter

Good hydraulic oil contains a variety of additives, these additives can prevent the oil metamorphism. However, these additives will lose their effect after a period of time..Therefore, oil should be replaced regularly to ensure that additives play a role.

Filters can only absorb a limited amount of dirt particles and other impurities from the oil.

Please change the hydraulic tank back to oil filter every 1000 hours, clean the oil filter when changing the hydraulic oil, so as to keep the system clean..

When replacing the hydraulic oil filter. Please check at the bottom of the filter if there are metal particles or crumbs; such as copper or iron filings show that hydraulic pumps, hydraulic motors or valve may have been damaged or will damage, such as rubber said hydraulic cylinder seal damage.

(2) regular discharge of fuel tank dirt

Regular release of water and sediment in the tank, for removing impurities in the oil is very important, but the regular replacement of the entire hydraulic system hydraulic oil is also very important. Sony to hydraulic tool that it is perfectly clear system of impurities, is the only reliable method of oxidation of hydraulic oil and other harmful impurities. Then, clean hydraulic oil recommended by Hitachi should be re added to the hydraulic system..

Please discharge the hydraulic oil tank to the oil tank dirt in every 250 hours.

(3) cleaning

If the hydraulic oil is contaminated, especially when the pump or cylinder, motor damage, must replace all hydraulic oil and clean the tank.

3. Keep working area clean.

Add hydraulic oil to the tank and add hydraulic oil, and ensure that the filter box cover is clean..

Sony said to hydraulic tools can only use clean funnel or container. Do not put dirt into the system.

When maintaining the hydraulic system, only clean plastic plug head is used to seal the end of the pipeline.

When hydraulic components are maintained, the bench must be absolutely clean..

Check the use of tools, and they should be very clean..