There is foreign matter in the hydraulic cylinder, the corresponding reason, and its analysis, specifically as follows:
(1) The oil port is open when the oil cylinder is stored, allowing foreign objects to enter.
(2) When installing the cylinder, its operating environment is not good, there is dirt, etc., so that foreign matter enters the hydraulic cylinder.
(3) The cylinder parts were not processed well during processing, leaving burrs, etc., and were installed without processing, resulting in foreign matter.
(4) Due to the movement of the parts, friction iron powder or iron filings, etc., and metal fragments, etc. are generated, which are left in the cylinder.
(5) There are scars on the inner surface of the cylinder wall, and then cracks occur, which causes the metal to fall off and produce foreign matter.