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一台格鲁夫RT745型起重机在使用过程中,因未按规定及时更换液压油,导致油液严重变质,最终造成大部分液压缸活塞杆表面大面积锈蚀,密封件损坏,液压系统趋于瘫痪。其中支腿水平伸缩液压缸(以下简称支腿水平缸)漏油尤为严重。解体检查发现其密封件严重老化、损坏,需立即更换。经咨询,支腿水平缸密封件(修理包)价格较高,经与有关人员分析、讨论,决定以支腿水平缸为试点,逐步用国产密封件代替原液压缸所有密封件。
A Grove RT745 crane in use, due to failure to timely replacement of hydraulic oil, resulting in serious deterioration of the oil, eventually resulting in most of the hydraulic cylinder piston rod surface area corrosion, seal damage, the hydraulic system tends to paralysis . One leg horizontal telescopic hydraulic cylinder (hereinafter referred to as leg horizontal cylinder) spill is particularly serious. Disintegration inspection found that the seal serious aging, damage, need to be replaced immediately. After consultation, the legs horizontal cylinder seals (repair kits) higher prices, with the relevant personnel analysis, discussion, decided to leg horizontal cylinder for the pilot, and gradually with the original seal instead of all the original seal of the hydraulic cylinder.