对康明斯发动机ＰＴ泵喷油器调整时一般是看传动皮带轮的记号。但往往由于工程机械因外表面过脏，或维修人员对记号位置不熟悉，机罩或辅件碍事使标记不易观察等给调整工作带来了困难。笔者根据多年的实践经验，总结出以进气门摇臂刚刚碰上气门十字轴作为标记的调整法，简便易? Cummins engine PT pump injector adjustment is generally seen on the drive pulley mark. However, often due to construction machinery due to the outer surface is too dirty, or maintenance staff not familiar with the location of the marker, hood or accessories obstruction makes the mark is not easy to observe, etc. to the adjustment work has brought difficulties. The author based on years of practical experience, concluded that the intake valve rocker just hit the valve cross shaft as a marker adjustment method, easy?