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我公司２０００年１０月购进的一台长江起重机厂ＱＹ２０Ａ型汽车起重机，仅使用了半年多，主机 ６１３５Ｑ－２ｄ柴油机的气门摇臂处就开始出现撞击异响，且响声逐渐加大。 拆检时发现，气门间隙过大，第Ｖ缸尤为严重（达２ ｍｍ左右）。调整后异响消失，但使用几天后又出现同
My company purchased in October 2000 a crane factory in the Yangtze QY20A crane, only used more than six months, the main engine 6135Q-2d diesel engine began to appear at the valve rocker impact noise, and gradually increased the sound. Disassembly found that the valve clearance is too large, V-cylinder is particularly serious (up to 2 mm or so). Allergenic disappeared after adjustment, but after a few days with the same appearance