手扶拖拉机旋耕机上使用的滚子传动链条,往往由于使用时间长,出现链条拉长的情况,这样容易打破罩壳,甚至由于拉得过长,不能使用。过去,我们曾多次碰到这个问题,但是没有办法修理,只得请贫下中农重新换链条。新买一支链条,要化二、三十元钱,给贫下中农增加不少负担,特别是由于链条供应较紧张,配不到新链条,碰到春耕或夏收夏种大 Walking roller Rotary tiller used in the roller drive chain, often due to the use of a long time, there chain elongation situation, so easy to break the shell, and even pulled too long, can not be used. In the past, we had repeatedly encountered this problem but failed to repair it. Instead, we asked the poor and middle-peasants to resume chain replacement. Newly buy a chain, to be two or three yuan of money, to increase the burden on the poor middle peasants, especially due to the supply chain more intense, with less than a new chain, met Spring or Summer Harvest large