一台鞍山产AT-10型通井机,滚筒在挂上高挡位(Ⅲ挡或Ⅳ挡)正转时,突然加大油门或高速运转中突然减小油门时都会发出“咔啦、咔啦”的响声(但以Ⅰ、Ⅱ挡正转及各挡位反转时却不响),情况类似于停机挂挡、离合器分离不彻底时发出的打齿声。检查时发现,声音来自滚筒变速器处,而且是高速正转时发响;用手触摸变速器正反转 An Anshan production AT-10-type well machine, the drum hanging in the high gear (Ⅲ block or Ⅳ block) forward, suddenly increase the throttle or high-speed operation will suddenly reduce the throttle will issue a “click, click You ”sound (but to Ⅰ, Ⅱ block forward rotation and the gear reversal does not ring), the situation is similar to the gear hanging, the clutch is not completely separated when the tooth flapping issued. Inspection found that the sound from the drum gearbox, but also when the high-speed forward rotation; Hand touch the transmission is reversing