一台东方红-12型拖拉机,在检修时更换了新的曲轴齿轮。经试车,启动容易,运转正常。但投入使用后的第3天,车速明显上升,加油时似有飞车的征兆。考虑到可能是调速拨叉与推力轴承之间的间隙偏大所致,当即拆开正时齿轮室盖检查,果然如此。于是通过调整杠杆上的固定螺钉将喷油泵齿杆在中间位置时的这个间隙调整为 A Dongfanghong-12 tractor, the replacement of a new crankshaft gear in the repair. After the test car, easy to start, normal operation. But put into use the first 3 days, the speed was significantly increased, refueling may seem signs of speeding. Taking into account the speed may be due to fork and thrust bearing gap between the larger due to the immediate disassembly of the timing gear chamber inspection, so it is. So by adjusting the lever on the fixed screw to the pump gear rack in the middle position of this gap adjustment