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原船用柴油机修理技术标准(JT4021～4051—65,以下简称“原标”),是在一九六三年根据交通部保有船用柴油机机型编制的。试行十多年来,随着我国水运事业的发展,船用柴油机不断更新,修理技术水平日益提高,原标准已不能适应生产发展的需要。在交通部标准计量研究所的组织下,于一九七六年六月初,由上海、文冲、新港、东风等船厂组成重审修订工作组,开展了调查、集编、征询、修订等一系列工作,并于一九七七年四月在交通部《船用柴油机修理技术标准》审查会议上,讨论通过了重审修订工作组提出的标准草案(JT4021～4051—77以下简称“新标”),经部批准于一九七八年七月一日开始施行。为便于贯彻
The original marine diesel engine repair technical standards (JT4021 ~ 4051-65, hereinafter referred to as “original standard”), was built in 1963 according to the Department of Transportation to retain marine diesel engine models. Trial 10 years, with the development of China’s water transport industry, marine diesel engines are constantly updated, increasing the level of repair technology, the original standard can no longer meet the needs of production and development. Under the auspices of the Institute of Standards and Metrology of the Ministry of Communications, in early June 1976, the revising working group of Shanghai, Wenchong, Xingang, Dongfeng and other shipyards formed a series of surveys, collection compilation, consultation and revision And discussed and approved the draft standard proposed by the revising and revision working group (JT4021 ~ 4051-77, hereinafter referred to as “the new standard”) at the review meeting of “Technical Standards for Repair of Marine Diesel Engines” issued by the Ministry of Communications in April 1977, ), Approved by the Ministry on July 1, 1978 came into operation. To facilitate the implementation