The maintenance method of the hydraulic oil filter is as follows:

1. Before replacing the original hydraulic oil, check the oil return filter element, oil suction filter element, pilot filter element to see if there are iron filings, copper filings or other impurities. In some cases, there may be failure of the hydraulic components. After troubleshooting, clean the system .

2. When changing the hydraulic oil, all hydraulic oil filters (return oil filter, suction filter, pilot filter) must be replaced at the same time, otherwise it is equivalent to not changing.

3. Distinguish the hydraulic oil markings. Do not mix hydraulic oils with different labels and brands. They may react to deteriorate and produce floc. It is recommended to use the specified oil.

4. Before refueling, an oil suction filter must be installed, and the nozzle covered by the oil suction filter directly leads to the main pump. If the impurities are light, the main pump will be accelerated and the pump will be worn.

5. Refuel to the standard position. There is usually an oil level gauge on the hydraulic oil tank. See the liquid level gauge. Pay attention to the parking method. Generally, all the oil cylinders are retracted, that is, the forearm and bucket are fully extended and landed.

6.Pay attention to the main pump to exhaust air after refueling. Otherwise, the whole car will be temporarily inactive, the main pump will be abnormal (air blast), and the air pocket will damage the main pump. The method of exhausting air is to loosen the pipe joint directly on the top of the main pump and fill it directly.

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