论文部分内容阅读
1.整机动作无力1台SC220.8型挖掘机工作装置动作无力,回转、行走缓慢,热车时动作无力现象更加明显。分析认为:该挖掘机各项动作均无力,其故障可能为前、后液压泵吸空、先导油路压力低、主溢流阀卡滞或前、后液压泵磨损严重所致。(1)检查液压泵是否吸空从液压油箱检查孔检查液压油油量充足、清澈透明、无气泡,由此说明油液无变质现象。检查液压泵吸油管路无漏油、无变形,系统无异常吸空噪声,由此说明液压泵不存在吸空现象。(2)检查先导油路压力将压力表接到先导泵出口测压点,
1. The whole machine weak motion 1 SC220.8 excavator working device weakness, rotation, walking slowly, hot car when the action is even more obvious weakness. Analysis that: the excavator all movements are weak, the failure may be before and after the suction pump air, the pilot line pressure is low, the main relief valve stuck or before and after the hydraulic pump due to serious wear and tear. (1) Check if the hydraulic pump sucks air Check the hydraulic oil tank check hole enough hydraulic oil, clear, no bubbles, thus indicating no deterioration of the oil phenomenon. Check the hydraulic pump suction pipe no oil leakage, no deformation, the system no abnormal suction noise, indicating that there is no suction pump hydraulic phenomenon. (2) Check the pilot oil pressure to the pilot pressure gauge connected to the outlet of the pilot pressure measurement point,