拖拉机上不能沾油的部位１．忌粘黄油处（１）安装活塞环时不能涂黄油如涂上黄油发动机工作时的高温会使黄油变成胶状物或结成炭渣，影响活塞环的弹力，使其密封性能降低，还会加剧机件的磨损。（２）装气缸垫时不能涂黄油因为发动机工作时，气缸的温度高达千度，黄油遇到... Tractor can not touch the site of oil 1. Avoid sticky butter (1) install the piston ring can not be coated with butter, such as butter when the engine is working will make the butter into a jelly or cinder residue, affecting the elasticity of the piston ring, so that the sealing performance is reduced, but also Will aggravate the wear and tear of the parts. (2) can not be coated with butter when the cylinder gasket because the engine work, the cylinder temperature up to a thousand degrees, the butter encountered ...