我队一台东方红—40拖拉机,大修后的第三个月,在冷却水箱中居然发现了机油,据大家分析,有两种可能性:一、机体与缸盖接合平面不平度过大。二、气缸垫冲坏。可是拆下缸盖和气缸垫时,发现气缸垫无明显异样,机体与缸盖接合面的不平度也没超过规定值,这样也就成了一个悬案。由于农忙季节来临,我们抱着一 I team a red-40 tractor, the third month after the overhaul, actually found in the cooling water tank oil, according to our analysis, there are two possibilities: First, the body and the cylinder head joint plane roughness is too large. Second, the cylinder pad washed. However, the removal of the cylinder head and cylinder head gasket, cylinder head gasket was found no significant difference, body and cylinder head joint surface roughness did not exceed the specified value, it will become a pending case. As the busy season approached, we held one