How to replace the hydraulic oil filter element in a hydraulic power unit

Hydraulic power units are the power source for various factories, and the most important aspect of their maintenance is the replacement of the hydraulic oil filter. How should the hydraulic oil filter be replaced? What precautions should be taken during the replacement process? Today, we'll discuss this together.
(1) Before replacing the hydraulic oil filter element in the hydraulic station, drain the original hydraulic oil in the tank and check the three types of hydraulic oil filters: return oil filter element, suction oil filter element and pilot filter element. Check if there are iron filings, copper filings or other impurities attached. If so, there may be a fault in the hydraulic gear pump component. After inspection and troubleshooting, clean the system and then replace it.
(2) When changing hydraulic oil, all hydraulic oil filter elements (return oil filter element, suction oil filter element, pilot filter element) must be replaced at the same time, otherwise it is equivalent to not changing them.
(3) Do not mix hydraulic oils of different grades or brands, as this may cause the hydraulic oil filter element to react and deteriorate, producing flocculent matter.
(4) Before adding oil, the hydraulic oil filter element (suction filter element) must be installed. The pipe covered by the hydraulic oil filter element leads directly to the main pump. If impurities enter, it will accelerate the wear of the main pump or even cause the pump to break down.
(5) After filling the hydraulic power unit with oil, be sure to bleed the air from the main pump. Otherwise, at best, the entire vehicle will be temporarily unable to operate and the main pump will make abnormal noises (air pops). At worst, cavitation will damage the hydraulic pump. The method for bleeding air is to loosen the pipe joint on the top of the main pump and fill it up directly.
(6) Perform regular oil quality checks. Hydraulic filters are consumables and should be replaced immediately if clogged.

(7) Ensure the hydraulic power unit's oil tank and pipelines are thoroughly cleaned. When adding oil, use a refueling device equipped with a filter.
(8) Do not allow the oil in the hydraulic power station tank to come into direct contact with the air. Do not mix new and old oil. This will help extend the service life of the filter element.