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挖掘机在作业时，其工作液压缸有时会出现动作缓慢、挖掘无力的症状，同时还伴有油温过高、内漏和内沉降的现象。此时，应立即停机检查，若发现液压油箱的回油滤网上有铁屑，则基本可以认定是缸筒、活塞被拉伤了，应做解体检查，看活塞及密封件是否已破损，缸筒是否拉伤起槽，
Excavators in the operation, the working cylinder sometimes appear slow movement, weakness of the symptoms of mining, but also accompanied by high oil temperature, internal leakage and the settlement phenomenon. At this point, should immediately stop checking, if found on the hydraulic oil tank return filter on the iron, the basic cylinder can be identified, the piston was injured, should be disassembled to see if the piston and seal have been damaged, the cylinder Whether the cartridge is torn from the slot,