一台东方红—75推土机在保养期间,机手修理十几天未见效,接连几次试发动机都产生烧瓦,甚至连主轴瓦及连杆铜套也烧坏,损失千元。仔细检查原因,首先从油道着手,从主油道用风泵吹通各缸油道及进出油孔,也未见什么故障,拆下机油滤清器总成,才发现机油 During the maintenance of a Dongfanghong-75 bulldozer, the hand repaired a dozen days did not work, several times the engine has been burning test, and even the main bearing and connecting rod copper sleeve is also burned, the loss of thousands. Careful examination of the reasons, first of all proceed from the oil path, the main oil from the main shaft with a wind pump through the cylinder and into the oil hole, there is no fault, remove the oil filter assembly, only to find the oil