一台泰山-25型拖拉机,空载时出现“飞车”;有载时出现功率不足,且有明显的单缸工作现象。检查油泵发现:第一缸分泵随动柱开口转动了1名O“(正常时不转动),柱塞调节臂折断。原因是油泵第一缸分擎的随动柱定位螺钉松动i脱落。当定位螺钉松动脱落后,失去了对随动柱的限制,随动柱在凸轮的作用下,一边上、下运动,一边转动,久而久之,柱塞调节臂在随动柱 A Taishan -25 tractor, no-load ”speeding“; when there is power shortage, and there is a clear single-cylinder work phenomenon. Check the pump found: the first cylinder with the opening of the cylinder column opening a rotation O ”(normal does not rotate), the plunger arm broken off. The reason is the first cylinder of the first cylinder of the fuel pump servo column positioning screw loose i fall off When the locating screw loosens, it loses the restriction of the follower post, the follower post moves under the action of the cam while it is moving up and down, and as time passes, the plunger adjusting arm moves on the follower post