钻机车的分动箱一轴后端的花键常被磨损或变形，无法实现动力的正常传递，因此必须进行维修。
In practice, the splines in rear of first axle of transfer case are often worn out or deformed, failing to finish the normal transmission of power, which should be maintenance.
因此，当发现水泵抽水不良时必须及时进行维修与调整。
Therefore, when the water pumping was found to be non-performing timely maintenance and adjustment.
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