东方红-28发动机上经常渗漏油部位主要有:1.缸盖上装起动活门操纵轴处;2.配气齿轮室上装液压泵分离手柄轴处;3.油标尺处。前两处原来采用油封总成密封;油尺处则采用外罩中加毡垫密封。我厂对上述防漏结构进行了两项改进: 1 采用新结构的油标尺(图1示)。新油尺由尺杆身1、尺杆套3(图2)、O形密封圈2(图3)组成, Dongfanghong -28 engines often leak oil parts are: 1. Cylinder head mounted on the starting valve operating shaft; 2. The gear box with hydraulic gear pump handle shaft separation; 3 oil ruler. The first two original oil seal assembly seal; oil dip at the place with a felt pad seal. I plant on the leak-proof structure of the two improvements: A new structure of the oil scale (Figure 1). The new oil dipstick by the rod shaft 1, rod rod sleeve 3 (Figure 2), O-ring 2 (Figure 3)